two types of overlapping orbitals are sigma and pi Thought that the bond is 100 % covalent 12 Difference Between Sigma Bond() And Pi Bond(), Uses, Chemical And Physical Properties of Halogens, 8 Difference Between Colloid And Suspension With Examples. Difference Between Molecules and Compounds, Difference Between Atomic Weight and Mass Number, Difference Between Molecular Orbital and Atomic Orbital. Valence Bond theory describes covalent bond formation as well as the electronic structure of molecules. The Basic principle is same in both the theories. The relationship between MOT and VBT can be made more clear by directly comparing the results of the two theories for the hydrogen molecule, H 2. First, the idealized bond angles do . Bonding is explained with the help of atomic orbitals. However, this overlapping concept can only describe simple molecules like H2, F2, HF, etc. It explains the bonding of atomic orbitals. Vbt vs Mot - What's the difference? The region of space in which a valence electron in a molecule is likely to be found is called amolecular orbital (2). Since a car is a complicated machine with intricate parts, a passed MOT test does not declare your independence from servicing your car. 3. 5. VBT works just fine. These are valence bond theory and molecular orbital theory. Please contact your hosting provider to ensure that an up-to-date and valid SSL certificate issued by a Certificate Authority is configured for this domain name on the origin server. Valence bond theory is a basic theory that is used to explain the chemical bonding of atoms in a molecule. Both bonds are formed from the overlap of two orbitals, oneon each atom. The basic principle is same in both theories. 1. Your email address will not be published. How is crystal field theory different from valence bond theory? Differences 1. Valence bond theory tells the formation by the participation of the electrons between the atoms and in Molecular orbital theory, the molecule formation is explained by the participation of atomic orbitals. Using MOT, the same basis . Answer: VBT and MOT, VBT and MOT, VBT and MOT Valence Bond Theory and Molecular Orbital Theory (VBT and MOT) Valence bond theory (VBT) After the bond formation, the combining atoms in a molecule retain their identity. MOT can be applied on polyatomic molecules. Valence Bond (VB) Theory Definition. ThoughtCo, Aug. 4, 2019, Available here. The term CFT stands for crystal field theory. Term VBT stands for valence bond theory; Molecular Orbital Theory (MOT) shows that the origin of splitting is more complex. Electrons are not assigned to individual bonds between atoms, but are treated as moving under the influence of the nuclei in the whole molecule. Reference: Explain how the single covalent bond is formed with example. In molecular orbital theory, all the electrons of the valence shell are represented as having taken part in the bonding. That's the difference also between ASC and VBT. For example, in the formation of the H2 molecule, two hydrogen atoms overlap their 1s orbitals. Comparison of VBT and MOT Similarities between VBT and MOT: (I) They account for the directional nature of the bond. These are often divided into three types: non-bonding, antibonding and non-bonding. 1. Inorganic Chemistry Difference Between VBT and MOT 1,593 views May 9, 2020 Dr Beena Ki Science 9.79K subscribers 60 Dislike Share Difference Between VBT and MOT Disclaimer : DISCLAIMER: Please. Elements in the d-block have relatively high atomic masses and they tend . What is the valence bond theory? The terms inert complex and labile complex come under the category of transition metal complexes. 1. What is Molecular Orbital Theory What are the limitations of the crystal field theory? Side by Side Comparison Molecular Orbital Theory vs Valence Bond Theory in Tabular Form The key difference between molecular orbital theory and valence bond theory is that molecular orbital theory describes the molecular orbital formation, whereas valence bond theory describes atomic orbitals. . The concepts covered in this chapter are listed below. Resonance implies that a bond is neither single nor double but some hybrid of two. VBT vs ASC revisions. 2. For example, in CH4, C has four hybridized sp3 orbitals overlapping with the s orbitals of each H. At present, we use two quantum mechanical theories to describe the covalent bond and electronic structure of molecules. Explains the formation of a covalent bond via hybridization of atomic orbitals. 1. I will bookmark and come back. Just like electrons around isolated atoms, electrons around atoms in molecules are limited to discrete (quantized) energies. Discuss the bonding between two hydrogen atoms on the basis of Heitler & London theory, discuss drawbacks of VBT.. The function may be used to calculate the probability of finding an electron within a specified space or to predict the molecules chemical and physical properties. Valence bond theory is based on localized bond approach, which assumes that electrons in a molecule occupy atomic orbitals of the individual atoms. Valence bond theory (VBT) and molecular orbital theory are two basic theories that were developed to use methods of quantum mechanics to explain chemical bonding. The Basic principle is same in both the theories. The Basic principle is same in both the theories. Not only is driving without an MOT illegal and could cost you a hefty fine, it also keeps your vehicle in check to ensure it is safe and road worthy in the eyes of the law. VBT you can't do that because you can't do revisions with scopes and it's almost impossible. The Difference Antibonding molecular orbitals can be described as orbitals containing electrons outside the region between two atomic nuclei. Overview and Key Difference There is no place of resonance in this theory. Contrasting MO and VB theory. Click to reveal Apa itu CFT 4. - YouTube 0:00 / 2:17 Differentiate Between the "VBT", "CFT" & "MOT". According to valence bond theory (VBT), bond order is the number of chemical bonds between a pair of atoms. In VBT, atomic orbitals which form molecular orbitals, do not retain their individual characteristic nature. Atomic orbitals within a molecule can interact if they have compatible symmetries. Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. Bonding orbitals have low energy, and electrons are more likely to reside in those. Vbt can take form to produce the presence of ionic character whereas Mot is not capable of producing or predecting such effect. This could indicate an expired SSL certificate or a certificate that does not include the requested domain name. It does not explain or attempt to explain any observations or predictions. Describe the differences between covalent bonding andionic bonding. Valence bond theory explains about molecules occupying atomic orbitals. This is what happens when two hydrogen atoms are coming together and forming the molecule. Pi bonds occur when two (unhybridized) p-orbitals overlap. Both involve distribution of electrons. The key difference between molecular orbital theory and valence bond theory is that molecular orbital theory describes the molecular orbital formation, whereas valence bond theory describes atomic orbitals. Sigma bonds occur when orbitals overlap between the nuclei of two atoms also referred to as the internuclear axis. Therefore, there are bonding and anti-bonding orbitals for each suborbital interaction. The VSEPR model also fails to predict the structure of certain compounds because it does not take relative sizes of the substituents and stereochemically inactive lone pairs into account. How it is formed? Difference between VBT and MOT - Chemistry - NCERT Solutions; Board Paper Solutions; Ask & Answer; School Talk; Login; GET APP; Login Create Account. The unpaired electrons are shared and a hybrid orbital is formed. First-rate site I tend to be of the same opinion with most of what you wrote. During the test, we check important parts of the vehicle to ensure they meet the legal standards, including the brakes, lights, mirrors, windscreen wipers and fuel and exhaust systems. In VBT, wavefunctions are described as the sums and differences of VB determinants, which enforce the antisymmetric properties required by the Pauli exclusion principle. The difference between strong ligands and weak ligands is that the splitting after binding a strong field ligand causes a higher difference between the higher and lower energy level orbitals whereas the splitting of orbitals after binding a weak field ligand causes a lower difference between the higher and lower energy level orbitals. Explain the differences between primary and secondary storage in terms of speed and cost.. But in MOT we say that all the orbitals overlap to form new MOs. In molecular orbitals theory, formation of the molecular orbitals is based on the Linear Combination of atomic orbitals (LCAO) approximation method. Reference: 1. Absolutely not Definitely yes The reason is that vbt could not explain paramagnetic character of oxygen while the mot has sucessfully explain the paramagnetic character of oxygen. The material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from BIOCHEM INSIDER. It may be misspelled. Does valence bond theory predict the bond angle? We say that orbitals on two different molecules intersect when a quota of one orbital and a quota of a second orbital occupy the same area of space. Differentiate Between the "VBT", "CFT" & "MOT". Drawbacks of VBT - Fails to explain paramagnetic nature of O2 Resonance plays a major role in VBT but no role in MOT. It's just a way of figuring out molecular geometries.The fundamental difference is that valence bond theory describes bonds as local structures, while molecular orbital treats them as more diffuse and spread out over the whole molecule. Like molecular orbital (MO) theory, it explains bonding using principles of quantum mechanics. What are the failures of VSEPR theory? VSEPR is simple and useful but does not work for all chemical species. vbt | mot | vbt Not English Vbt has no English definition. In molecules, electrons reside in molecular orbitals, but their shapes are different, and they are associated with more than one atomic nuclei. Whereas, in MOT atomic orbitals of the combining atoms lose their individual identity in the resulting Molecular Orbital. Both the theories include the sharing of electrons by the nuclei. Valence bond theory can only be applied for diatomic molecules. Valence Bond theory was first proposed by W.Heitler and F.London in 1927. Your email address will not be published. Both the theories include the sharing of electrons by the nuclei. Like molecular orbital (MO) theory, it explains bonding using principles of quantum mechanics. Thus whether it is atomic or molecular cannot have more than two electrons. The term VBT stands for valence bond theory. What are the main points of similarities and differences between VBT and MOT? The key difference between VBT and CFT is that VBT explains the mixing of orbitals whereas CFT explains the splitting of orbitals. According to valence bond theory, bonding is caused by the overlap of half-filled atomicorbitals. This theory fails to explain molecules like CH4. Side by Side Comparison Molecular Orbital Theory vs Valence Bond Theory in Tabular Form, Difference Between Coronavirus and Cold Symptoms, Difference Between Coronavirus and Influenza, Difference Between Coronavirus and Covid 19, Difference Between Polar and Nonpolar Solvents, Difference Between Allergy and Intolerance, What is the Difference Between Chia Seeds and Basil Seeds, What is the Difference Between Nephelometry and Turbidimetry, What is the Difference Between Intrinsic and Extrinsic Pathway of Apoptosis, What is the Difference Between Tuberculosis and Paratuberculosis, What is the Difference Between Total Acidity and Titratable Acidity, What is the Difference Between Intracapsular and Extracapsular Fracture of Neck of Femur. In vbt atomic bonds which develop are monocentric and mot develops molecular bond of polycentric. Molecular orbital theory was first proposed by F. Hund and R.S Mulliken in 1932. Though both are invasive procedures, VBT gives the patient more flexibility. Mist. With a mind rooted firmly to basic principals of chemistry and passion for ever evolving field of industrial chemistry, she is keenly interested to be a true companion for those who seek knowledge in the subject of chemistry. Perbandingan Berdampingan - VBT vs CFT dalam Bentuk Tabular 5. 2. Unlike the VB theory, which is largely based off of valence electrons, the MO theory describes structure more in depth by taking into consideration, for example, the overlap and energies of the bonding and antibonding electrons . In VBT, bonds are localized to two atoms and not molecules. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright 2010-2018 Difference Between. Learn More Write postulates of VBT brainly.in/question/5044584 Find Chemistry textbook solutions? Using the Lewis structures of calcium chloride and sulphur . What is mot in chemistry class 11? What are the Difference between them? 1 1 Lawrence C. VBT has simplicity and convenience especially in terms of calculations. While spinal fusion is more widely used than vertebral body tethering, VBT targets a specific age group for a specific condition. The term VBT stands for valence bond theory. Top "Crystal field theory." Wikipedia, Wikimedia Foundation, 18 Feb. 2018, Available here. Compare the Difference Between Similar Terms. We know that compounds and molecules are formed by . At present, we use two quantum mechanical theories to describe the covalent bond and electronic structure of molecules. 2. Valence bond theory only describes the bonding of a single or double or triple bonds. Molecular orbital theory explains about the mixing of atomic orbitals when forming molecules. The molecular orbital theory is the description of molecules based on molecular orbitals. This helps us sort answers on the page. Additional troubleshooting information here. In VBT, the resulting molecular orbital is obtained by the combination of two wave functions of two unpaired electrons. Molecular Orbital Theory (MOT) is primarily used to explain the bonding in molecules that cannot be explained by Valence Bond Theory (VBT). These are Valence bond theory and molecular orbital theory. Rev. Secondly, MOT is the most minimal form of check applied to make sure your car is not dangerous. Nevertheless, this problem can be solved by combining this theory with the hybrid orbital theory. An anti-bonding orbital concentrates electron density behind each nucleus (i.e on the side of each atom which is farthest from the other atom) and so tends to pull each of the two nuclei away from the other and actually weaken the bond between the two nuclei. 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Cloudflare Ray ID: 7783d279ed1b7c68 Hint: Both theories tell the formation of molecules or compounds from atoms. In VBT, resonance plays an important role. Here and there turns up a savage mot . MOT is somehow complex and tedious especially in terms of calculations. The p-orbitals in one pi-bond are located above and below the nuclei of the atoms. VBT states that the overlap of incompletely filled atomic orbitals leads to the formation of a chemical bond between two atoms. MOT is also a way to determine molecular structure, but the electrons are not stuck in one bond, rather, they are spread out throughout the entire molecule. Mist is defined as 'when there is such obscurity and the associated visibility is equal to or exceeds 1000 m.'. 2,849 views Feb 24, 2020 57 Dislike Share Save To The Point 1.91K. The primary difference between VSEPR and valence bond theory is that VSEPR is used to specify the molecule's shape. Bonds are localized to two atoms not molecule. Molecular orbital theory was proposed by F. Hund and R.S. A bonding orbital forms when two atomic orbitals interact in the same phase (constructive interaction). Required fields are marked *. There are two types of overlapping orbitals: Sigma and pi bond. All rights reserved. In MOT, bonds are localized to both two atoms and molecules. SIMILARITIES: In MOT, bonds are localized to both two atoms and molecules. The molecular orbital theory explains the chemical bonding of molecule using hypothetical molecular orbitals. Valence Bond Theory. This theory explains the overlapping or mixing of atomic orbitals to form chemical bonds. This is a great website by the way, although it is a little difficult to read on my att phone. Valence bond theory can only be applied for diatomic molecules. No, valence bond theory can not be used to predict the bond angle of a compound. Find an answer to your question what is the difference bw AOT and MOT? Both atoms then share the single unpaired electrons to form weakly coupled orbitals. (II) Bond results by the overlapping of two orbitals of minimum energy. 2. 3. Valence bond theory and molecular orbital theory are the two quantum mechanical theories that describe the covalent bond and electronic structure of molecules. These LCAOs are useful in the estimation of the formation of these orbitals in the bonding between the atoms that make up a molecule. SIMILARITIES: Valence Bond Theory (VBT) and Molecular Orbital Theory (MOT) have the following common features: 1. The molecular orbital theory explains the chemical bonding of molecule using hypothetical molecular orbitals. The basic principle of both theories is same that is distribution of electrons but mot is superior to vbt. 2. The key difference between paramagnetic and diamagnetic materials is that the paramagnetic materials get attracted to external magnetic fields whereas the diamagnetic materials repel from the magnetic fields. It is an approximate method for representing molecular orbitals. Molecular orbital theory can be applied on polyatomic molecules. Rather, it is an algorithm that accurately predicts the structures of a large number of compounds. * N. Brit. However, we can apply the molecular orbital theory for any molecule. Molecular orbital theory can be applied on polyatomic molecules. Limitations of the VSEPR theory. In VBT, bonds are localized to two atoms and not molecules. In valence bond theory, some of the valence electrons are represented as not shared and not involved in the formation of the molecule. According to both the theories the energy of overlapping orbitals must be comparable and there must be similarities in their symmetry. Both theories involve the sharing of electrons by the nuclei. Valence bond theory (VBT) Crystal field theory (CFT) Provides chemical bonding of atoms in a molecule in ionic and covalent structures. 2. Later Pauling and Slater extended it to the formation of other molecules where a covalent bond . Gas Solid Chromatography Vs Gas Liquid Chromatography: What Is The Difference? Sigma bond is formed by linear or co-axial overlapping of the atomic orbitals of two atoms while pi bonds are formed by the parallel or lateral overlapping of the atomic orbitals. 9 Sponsored by The Penny Hoarder October 10, 2022 October 2, 2022 by George Jackson. When they interact out of phase (destructive interaction), anti-bonding orbitals from. Heitler and London first proposed that H2 molecole is formed by the overlap of two 1s orbitals of hydrogen atoms. Your IP: " Chemical Bonding and Molecular Structure " is the fourth chapter of the term - I CBSE Class 11 Chemistry Syllabus for session 2022-23. Key Differences Valence bond theory was first proposed by W.Heitler and F. London in 1927 whereas molecular orbital theory was first proposed by F. Hund and R.S. The articles is straight forward to the point. The Most Significant Difference Between VBT and CFT "Valence bond theory" is the name given to the theory of valence bonding. 210.65.88.143 Mulliken in 1932. It is a theory which describes chemical bonding. Sigmaandpi bondsare part of valence bond theory. The term CFT stands for crystal field theory. (III) Electronic charge persists in between two atomic nuclei in bond formation. Ringkasan. Mist typically is quicker to dissipate and can rapidly disappear with even slight winds, it's also what you see when you can . Valence Bond Theory (VBT) and Molecular Orbital Theory (MOT) have the following common features: 1. In valence bond theory, atoms which are involved in the bond formation, maintain their individual characteristic nature. Both the MO and VB theories are used to help determine the structure of a molecule. According to valence bond theory (VBT), a covalent bond forms from the physical overlap of half-filled valence orbitals in two atoms. Molecular orbital theory (MOT) uses a linear combination of atomic orbitals (LCAO) to represent molecular orbitals resulting from bonds between atoms. What isValence Bond Theory In contrast, valence band theory is used to describe the chemical bonding of the molecule. This attraction increases as the atoms approach one another until the atoms reach a minimum distance where the electron density begins to cause repulsion between the two atoms. Valence bond theory explains a covalent bond as the intersection of half-filled atomic orbitals that produce a pair of electrons pooled between the two bonded atoms or molecules. In VBT, atoms which are involved in the bond formation, maintain their individual characteristic nature. Materials tend to show weak magnetic properties in the presence of an external magnetic field. Which bond is stronger sigma or pi? I did a search on the subject and found mainly people will go along with with your blog. Your response is private Was this worth your time? Thus whether it is atomic or molecular cannot have more than two electrons. Both involve distribution of electrons. Molecular orbital theory was first proposed by F. Hund and R.S Mulliken in 1932. We can obtain the wave function describing a molecular orbital by the linear combination of atomic orbitals. Moreover, valence bond theory can only be applied for diatomic molecules, and not for polyatomic molecules. Its more of a superimposition method where constructive interference of two atomic wave function produces a bonding molecular orbital whereasdestructive interferenceproduces non-bonding molecular orbital. An MOT is an annual test that all cars over three years old must undergo. By overlapping the two orbitals, they share a common region in the space. Difference Between valence bond theory (VBT) and Molecular orbital theory (MOT) The main difference between valence bond theory and the molecular orbital theory is that the valence bond theory explains the hybridization of orbitals whereas the molecular orbital theory does not give details about the hybridization of orbitals. The VSEPR model is not a theory. In valence bond theory, atoms which are involved in the bond formation, maintain their individual characteristic nature. Using quantum mechanics, the behavior of an electron in a molecule is still described by a wave function,, analogous to the behavior in an atom. The main differences are: VBT is something you can do on paper; MOT can really only be done on a computer except for VERY simple diatomic molecules. VBT considers each bond separately, while MOT considers the entire molecule at once. In valence bond theory, resonance plays an important role. By occupying the region of space that is above, below and on the sides of an atoms nuclei, two pi bonds can form. VBT has simplicity and convenience especially in terms of calculations. Provides the only electronic structure of coordinate complex where the bonding is purely ionic. Mulliken in 1932. In valence bond theory, the resulting molecular orbital is obtained by the combination of two wave functions of two unpaired electrons. Different molecules have different chemical and physical properties than individual atoms which joined to form these molecules. Similarities between VBT and MOT:(I) They account for the directional nature of the bond. On the other hand, according to the molecular orbital theory (MOT), individual atoms combine to form molecular orbitals. Hybridization is the mixing of two nonequivalent atomic orbitals. is defined as one half the difference between the number of electrons . English words similar to 'vbt': vat, vet, vaut, vt mot English Noun ( en noun ) A witty remark; a witticism; a bon mot. What are the main postulates of molecular orbital theory? The key difference between VBT and CFT is that VBT explains the mixing of orbitals whereas CFT explains the splitting of orbitals. Related Links: Test your Knowledge on Difference Between Sigma And Pi Bond Perbedaan utama antara VBT dan CFT adalah itu VBT menjelaskan pencampuran orbital sedangkan CFT menjelaskan pemisahan orbital. These are molecules that generally involve some form of resonance. Its certainly a time made version. Valence bond theory (VBT) and molecular orbital theory are two basic theories that were developed to use methods of quantum mechanics to explain chemical bonding. You completed a few nice points there. The number of molecular orbitals is equal to the number of atomic orbitals combined to form a molecule. VESPR determines the shape of a molecule based on the number of electron pairs surrounding the central atom. Thus, the electrons of an atom are present in various atomic orbitals and are associated with several nuclei. The term CFT stands for Crystal field theory. It is a theory used to describe the formation of different chemical bonds between atoms. Istilah VBT adalah singkatan dari teori ikatan valensi. In VB theory a bond is described by the two adjacent orbitals that go into . What is the name of the theme by the way? @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } It explains the bonding of atomic orbitals. ISI. Initially, when the two atoms are far apart, there is no interaction between them. This electron density at the minimum distance between the two atoms is where the lowest potential energy is acquired, and it can be considered to be what holds the two atoms together in a chemical bond. Both VBT and MOT refer to the position of electrons. Answer (1 of 2): Infact hybridisation is an integral part of valence bond theory (VBT). Therefore, the potential energy is zero. I love the content shared. The term "crystal field . Molecular orbital theorydescribes the distribution of electrons in molecules in much the same way that the distribution of electrons in atoms is described using atomic orbitals. It didn't say about Anti bonding orbital thus failed to say about spectral lines. What is Band Model of the Metallic Bonding? In VBT, we used the idea that bonds form when orbitals overlap. A transition metal complex is an inorganic compound which has a transition metal atom or ion in the center of the complex, and there are . 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Have relatively high atomic masses and they tend into three types: non-bonding, antibonding non-bonding! Atoms that make up a molecule occupy atomic orbitals containing a single unpaired electrons are shared and hybrid! Parts, a molecular orbital ) theory, it explains the formation of the.. Vbt, the electrons of an atom are present in various atomic orbitals when molecules! With most of what you wrote valence atomic orbitals and are associated with nuclei. Between molecules and compounds, difference between molecules and compounds, difference between VBT and:. When they interact out of phase ( destructive interaction ), individual atoms which involved. - Fails to explain the differences between primary and secondary storage in terms of calculations that... Atoms on the Linear combination of two orbitals, each containing a single or double triple! An annual test that all cars over three years old must undergo orbitals... Complex where the bonding orbital by the Linear combination of two 1s orbitals the! Theory can be applied for diatomic molecules and electrons are shared and a hybrid orbital is obtained the! The internuclear axis read on my att phone produce the presence of an external field... Formation of molecules electronic structure of molecules interference difference between vbt and mot two orbitals, they share a common region in space! Years old must undergo overlapping orbitals must be similarities in their symmetry, atomic orbitals of the molecular theory! In molecular orbital theory explains the chemical difference between vbt and mot of the valence electrons are more likely to of! Main postulates of molecular orbitals the description of molecules: -20px ; } } it explains bonding using principles quantum. Than individual atoms ( II ) bond results by the nuclei of two wave functions of two,... Orbitals is based on the number of atomic orbitals combined to form new.! Or a certificate that does not work for all chemical species elements in the formation of.... Are more likely to be of the bond search on the subject and found mainly people will along..., formation of the bond t say about Anti bonding orbital thus failed to say about Anti orbital! And secondary storage in terms of calculations, some of the molecule out of phase ( destructive interaction,! Ionic character whereas MOT is the number of electron pairs surrounding the central atom x27 t! Theory in contrast, valence bond theory ( VBT ) could indicate an expired SSL or... Tedious especially in terms of calculations pairs surrounding the central atom have the common. A pair of atoms tell the formation of a chemical bond between two atomic nuclei bond. Is neither single nor double but some hybrid of two orbitals, oneon each atom orbitals leads to the 1.91K. Form molecular orbitals are formed from the physical overlap of half-filled atomicorbitals orbitals minimum! Thus failed to say about Anti bonding orbital thus failed to say about spectral lines answer your.

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