1023962-82-4Relevant academic research and scientific papers
Pyridine-2-thione (pySH) derivatives of silver(I): Synthesis and crystal structures of dinuclear [Ag2Cl2(μ-S-pySH)2(PPh3)2] and [Ag2Br2(μ-S-pySH)2(PPh3)2] complexes
Lobana, Tarlok S.,Sharma, Rohit,Butcher, Ray J.
, p. 1375 - 1380 (2008)
Reaction of silver(I) halides with PPh3 in acetonitrile and then with pyridine-2-thione (pySH) chloroform (1:1:1 molar ratio) has yielded sulfur bridged dimers of general formula, [Ag2X2(μ-S-pySH)2(PPh3)2] (X = Cl, 1, Br, 2). Both these complexes have been characterized using analytical data, NMR spectroscopy and single crystal X-crystallography. The central Ag2S2 cores form parallelograms with unequal Ag-S bond distances (2.5832(8), 2.7208(11) A?) in 1 and (2.6306(4), 2.6950(7) A?) in 2, respectively. The Ag?Ag contacts of compounds 1 and 2 are 3.8425(8) and 3.8211(4) A?, respectively. The angles around Ag (in the range 87.19(2)-121.71(2)° in 1 and 87.81(2)-121.53(2)° in 2) reveal highly distorted tetrahedral geometry. There are inter dimer π-π stacking interactions between pyridyl rings (inter ring distances of 3.498 and 3.510 A? in complexes 1 and 2, respectively). The solution state 31P NMR spectroscopy has shown the existence of both monomers and dimers. The studies reveal relatively weaker intramolecular -NH?Cl hydrogen bonding in case of AgCl vis-a?-vis that in CuCl which favored both a monomer and a dimer with AgCl, and only a monomer with CuCl.
