ELECTROCHEMICAL SYNTHESIS OF MANGANESE(II) COMPLEXES OF PYRIMIDINE-2-THIONES - THE CRYSTAL-STRUCTURES OF BIS-4,6-DIMETHYLPYRIMIDYL-2-2'-DISULFIDE AND IS(4,6-DIMETHYLPYRIMIDINE-2-THIOLATO)MANGANESE(II)

The electrochemical oxidation of anodic manganese in an acetonitrile s olution of pyrimidine-2-thione (pymtH) or 4,6-dimethylpyrimidine-2-thi one (4,6-Me(2)pymtH) and nitrogen donor bidentate ligands such as 1,10 -phenanthroline (phen) or 2,2'-bipyridine (bipy), yielded mixed comple xes [Mn(pymt)(2)phen], [Mn(4,6-Me(2)pymt)(2)phen] and [Mn(4,6Me(2)pymt )(2)bipy]. The crystal structures of bis-4,6-dimethylpyrimidyl-2-2'dis ulphide and -(4,6-dimethylpyrimidine-2-thiolato)managanese(II) have be en determined by X-ray diffraction. In the manganese complex the metal has a distorted octahedral trans-MnS2N4 geometry with one nitrogen at om of each pyrimidine ligand uncoordinated.