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    Bonding in coordination chemistry

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    Why do square planar geometries occur in d7, d8, and d9 ions with strong field- pi acceptor ligands, except in cases in which ligand geometry requires it?

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    Solution Preview

    The d orbitals of metal split into two groups with octahedral coordination, like the following
    - - dx2-y2, dz2
    - - - dxy, dxz, dyz

    When there are 7 d electrons, 6 go to the lower set of orbitals, one goes to the higher set of orbitals.
    If we get ...

    Solution Summary

    This solution is provided in 217 words. It references octahedral coordination in order to answer why square planar coordination occurs in certain ions.