Reactions of Sodium N,N-Diethyldithiocarbamate and Potassium Ethyl Xanthate with some 3d Transition Metal Halides in the presence of 2,2′-Bipyridyl and 1,10-Phenanthroline

The synthesis and some properties of ethylxanthate (Xan − ) complexes, MXan 2 and MXan 3 − (M = manganese(II) and iron(II)) are reported. Reactions between divalent metal halides (manganese, iron, cobalt, nickel, copper, and zinc) and Xan − and between the metal halides and N,N-diethyldithiocarbamate (dtc − ) in the presence of nitrogen bases 1,10-phenanthroline (phen) and 2,2′-bipyridyl (bipy) are described. The major products of these reactions are complexes of the type MXan 2 .Base and Mdtc 2 .Base (with notable exceptions). In the former series with bipy, two different crystalline modifications of the manganese, iron, and cobalt complexes are formed, and copper(II) is reduced to copper(I) by Xan − in the presence of both bases. In the nickel-dtc system with bipy, Nidtc 2 is produced, while with phen, the complex [Niphen 3 ]dtc 2 is formed. The latter reacts very rapidly with methylene chloride. Cudtc 2 is produced from the copper(II)/base/dtc reactions.