Electronic Structures of Square Planar Metal Complexes
The relative energies of the molecular orbitals in square planar metal complexes is a problem which has received considerable attention in the last few years (1–10). of the antibonding molecular orbitals derived from the d valence orbitals, it is generally accepted that the σ*(x2-y2) orbital is much less stable than the other four levels [π*(xy), σ*(z2), π*(xz, yz)]. This level scheme is consistent with the fact that almost all known square planar metal complexes contain a d8central metal ion and are diamagnetic, since eight valence electrons can be exactly accomodated in the four reasonably stable orbitals.
KeywordsIntramolecular Charge Transfer Stable Orbital Valence Orbital Planar Copper Coordination Octahedron
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