which are consistent with a low spin state of Ni(II) ions, and exhibit spin states of (0, 0, 0) for the three Ni(II) ions. One of the terminal Ni(II) ions of [Ni(3)(Lms)(2)(dpa)(2)(H(2)O)] (Lms(2-) = N,N'-bis(4-methylsulfonyl)-pyridyldiamido) and [Ni(3)(Lpts)(2)(pepteaH(2))] (pepteaH(2)(2-) = pentapyridyldiamidodiamine) bonded with an axial ligand exhibits a square pyramidal (NiN(4)X) geometry with
ligand‐unbridged Cu(I)‐Cu(I) separations, but compound (3) does not. The ligand‐unbridged Cu(I)‐Cu(I) distances in (2) are shorter than those in (1). In absorption spectra, compound (2) displayed red shifts from (1) due to the increase in nuclearity and the number of the aromatic rings in ligands. TDDFT calculations suggest that in HOMOs, the major molecular orbital contribution is from the six Cu(I) atoms implying