Linkage Modes of Nickel(II) and Cobalt(III) Complexes with C-C Linked Bimacrocyclic Ligands

The X-ray structural analysis revealed three types of linkage modes (eq-eq, ax-eq, and ax-ax) due to the stereochemical difference in bridging two macrocycles by a C-C bond for bimacrocyclic nickel(II) and cobalt(III) complexes.