Help! My homework calls for me to compare and contrast the Valence Bond Theory a
ID: 1021777 • Letter: H
Question
Help! My homework calls for me to compare and contrast the Valence Bond Theory and the Molecular Orbital theory by applying at least 2 chemical compounds.Looking for the simplest examples in order to show application for 2 chemical compounds. Thank you Help! My homework calls for me to compare and contrast the Valence Bond Theory and the Molecular Orbital theory by applying at least 2 chemical compounds.
Looking for the simplest examples in order to show application for 2 chemical compounds. Thank you
Looking for the simplest examples in order to show application for 2 chemical compounds. Thank you
Explanation / Answer
The bonding pairs of electrons are localized between two atoms in Valence bond theory, In Molecular orbital theory electrons in all bonds are spread out (delocalized) overall molecular bonding orbitals in molecule
Valence Bond Theory for O2
Lewis diagram predicts sp2 hybridization on O atoms. Molecular shape predicted to be flat. Correct bond order is 2. All orbitals are occupied by pairs of electrons – not paramagnetic
Molecular Orbital Theory for O2
No prediction about molecular shape. Correct bond order (net pairs of electrons in bonding orbitals). Some unpaired electrons – paramagnetic
Valence Bond Theory for inert gases
Valence Bond theory explains that in inert gases orbital have already spin paired, so they have no tendency to form any linkage.
Molecular Orbital Theory for inert gases
Molecular orbital theory explains the non-existence of molecules of inert gases, since number of bonding and antibonding electrons are equal.
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