Synthesis and crystal structure of a heterobimetallic nickel-manganese 12-metallacrown-4 methanol disolvate monohydrate compound.

The synthesis and crystal structure of the title compound [systematic name: di-μ-acetato-tetra-kis-(μ-,2-dioxido-benzene-1-carboximidato)hexa-methano-ltetra-manganese(III)nickel(II) methanol disolvate monohydrate], [MnNi(CHNO)(CHO)(CHO)]·2CHO·HO or Ni(OAc)12-MC-4·2CHOH·HO, where MC is metallacrown, OAc is acetate, and shi is salicyl-hydroximate, are reported. The macrocyclic metallacrown is positioned on an inversion center located on the Ni ion that resides in the central MC cavity. The macrocycle consists of an Mn-N-O repeat unit that recurs four times to generate an overall square-shaped mol-ecule. Both the Ni and Mn ions are six-coordinate with an octa-hedral geometry. In addition, the Mn ions possess an elongated Jahn-Teller distortion along the -axis of the coordination environment. The inter-stitial water mol-ecule is slightly offset from and disordered about an inversion center.