THE CHEMISTRY OF PYRIDINE THIOLS AND RELATED LIGANDS .5. SYNTHESIS AND SPECTROSCOPY OF NICKEL(II) AND COPPER(II) COMPLEXES CONTAINING 1-OXOPYRIDINE-2-THIONE AND 2,2'-BIPYRIDINE OR 1,10-PHENANTHROLINE

Reactions of bis(1-oxopyridine-2-thione) Ni-II or Cu-II with 2,2'-bipy ridine (bipy) or 1,10-phenanthroline (phen) yield complexes of stoichi ometry: Ni(C5H4NOS)(2)L {L = bipy, two isomers: (1) and (2), L = phen, one isomer (3)} and Cu(C5H4NOS)(2)(phen). 0.75CHCl(3) (4). The spectr oscopy (i.r., u.v.-vis., e.s.r.) and magnetism studies of the above co mplexes are described. On the basis of conductivity, the Cu-II-phen co mplex has been formulated as [Cu(C5H4NOS)(phen)(2)] [Cu(C5H4NOS)(3)]. 1.5CHCl(3) (4). The vis. absorption spectra support similar octahedral structures for the minor bipy isomer (2) and for the Ni-II-phen compl ex [(3)], whereas the major isomer C(I)1 has a different structure. Th e e.s.r. spectrum of the Cu-II-phen complex (4) is commensurate with a n elongated octahedral structure. New methods for the preparation and spectroscopy of M(C5H4NOS)(2) (M = Mn, Ni, Cu or Zn) compounds have be en investigated.