l. Six-coordinate Cr(II) complexes of the type trans-[CrL4A2]n+ gercrally have magnetic moments consistent with three rrnpaired electrons, which suggests occupancy of the d orbitals as shown to the right. In principle, a complex with only one unpaired electon could be generated by a suitable choice of L and A suchthat the separation between the dxy and the degenerate dxz, dyz orbitals becomes larger than the spin pairing energy.
Assume that L is a o-donor only ligand. Would strong fi donors OR stong r acceptors be the best choice for axial ligand A in order to increase the separation of the dxy and the degenerate dxz, dyz orbitals? Explain the basis for yorn choice being careful to: 1) explicitly indicate the relative energies of the metal and ligand a orbitals and 2) explicrtly indicate the speci{ic ligand orbitalmetal orbital interactions that will influence the relative energies of the dxy and the degenerate dxz, dyz orbitals.