This can also be described as saying that the molecular orbital approach neglects electron correlation while the valence bond approach overestimates it.
22.
Affleck et al . were interested in constructing a one-dimensional state with a valence bond between every pair of sites.
23.
Later, Linus Pauling used valence bond theory to propose that the most significant resonance canonicals had two ? bonds involving d orbitals.
24.
In valence bond theory, two atoms each contribute an atomic orbital and the electrons in the orbital overlap form a covalent bond.
25.
They showed that the system exhibits a " Landau forbidden " quantum phase transition between a Neel antiferromagnet and a valence bond solid.
26.
Valence bond theory proposes that covalent bonds consist of two electrons lying in overlapping, usually hybridised, atomic orbitals from two bonding atoms.
27.
Their valence bond treatment of this problem, in their joint paper, was a landmark in that it brought chemistry under quantum mechanics.
28.
In valence bond theory, the two electrons on the two atoms are coupled together with the bond strength depending on the overlap between them.
29.
The localized sp 3 orbitals corresponding to each individual bond in valence bond theory can be obtained from a linear combination of the four molecular orbitals.
30.
Molecular geometry is determined by the valence bond approximation this can be understood by the type of bonds between the atoms that make up the molecule.
