SOME PYRIDINE-2-THIOLATO AND 6-METHYLPYRIDINE-2-THIOLATO COMPLEXES OFMANGANESE - CRYSTAL-STRUCTURE OF [MN-2(MU-PYS)(2)(CO)(6)] (PYS=PYRIDINE-2-THIOLATO LIGAND)

The complexes [Mn-2(mu-pyS)(2)(CO)(6)] (1) and [Mn-2(mu-MepyS)(2)(CO)( 6)] (2), where pySH=pyridine-2-thiol and MepySH=6-methylpyridine-2-thi ol, have been made by reaction of Mn-2(CO)(10) with the appropriate py ridinethiol in refluxing hexane. In these complexes pyS and MepyS act as both six electron donor chelating and bridging groups which form fo ur-membered N,S chelate rings at one metal centre and bridge to the ot her metal atom through sulphur. Complex 2 reacts with PPh(3) and Ph(2) PCH(2)PPh(2) (dppm) in refluxing cyclohexane to give [Mn(MepyS)(PPh(3) )(CO)(3)] (3) acid [Mn(MepyS)(eta(1)-dppm)(2)(CO)(2)] (4) respectively . The crystal structure of 1 was determined.