Recent developments in the synthesis of metal complexes of sulphur-don
or ligands are discussed, together with an account of the preparation
of the new 1,2-dithiolate ligand 6-methylene-1,4-dithiepin-2,3-dithiol
(H-2 dpdt). The structure and electrochemical properties of [Bu(4)N][
Cu(dpdt)(2)] are described.