SYNTHESIS OF MIXED-LIGAND MANGANESE(II) COMPLEXES WITH ALKYL XANTHATEIONS AND NITROGEN-CONTAINING HETEROCYCLES - CRYSTAL AND MOLECULAR-STRUCTURE OF THE [MN(S2COC3H7-I)2(2,2'-BIPY)] COMPLEX

We have synthesized high-spin mixed-ligand Mn2+ complexes Mn(S2COR)2L where R = i-C3H7, i-C4H9; [L = 1,10-phenanthroline (Phen), 2,2'-bipyri dyl (2,2'-Bipy), 4,4'-bipyridyl (4,4'-Bipy)]. As solids, the compounds are stable to oxidation by atmospheric oxygen. An X-ray structural st udy of the [Mn(S2COC3H7-i)2(2,2'-Bipy)] complex was carried out. The s tructure is composed of discrete monomeric molecules. The coordination polyhedron of the Mn atom is a distorted [4S + 2N] octahedron. The mo lecules are bonded by van der Waals interactions.