The coordination chemistry of the versatile ligand bis(2-pyridylthio)methane

Abstract

Bis(2-pyridylthio)methane [bpytm, (pyS)2CH2] and complexes of this ligand with ZnII, HgII, CuI, and AgI have been prepared and characterised by elemental analysis, by IR, Raman and 1H and 13C NMR spectroscopy, and by X-ray diffractometry. The ligand is N,N′-didentate in the ZnII complexes; N-monodentate in one HgII complex and N,N′-bis(monodentate) in the other; N-mono-N′,S-didentate in the CuI complex; and N,S′-bis(mono)-N′,S-didentate in the AgI complex. The structural parameters of the ligand in each coordination mode are compared with those of the free ligand and those of the triiodide salt of the protonated ligand.