Inorganic Chemistry, Vol.41, No.16, 4102-4104, 2002
Alkylation reactions of [WS4](2-) and [(eta(5)-C5Me5)WS3](-) with 2,6-bis(bromomethyl)pyridine: The first isolation of bisalkylated tetrathiometalate WS2{2,6-(SCH2)(2)(C5H3N)}
The trithio and tetrathio complexes of tungsten (PPh4)[Cp*WS3] (Cp* = eta(5)-C5Me5) and (PPh4)(2)[WS4] undergo alkylation reactions with 2,6-bis(bromomethyl)pyridine to yield [(Cp*WS2)(2){2,6-(SCH2)(2)(C5H3N)}].CH3CN (1.CH3CN) (73.1% yield) and WS2{2,6-(SCH2)(2)(C5H3N)} (2) (76.0% yield), respectively. In the dinuclear complex 1, two Cp*WS3 units are linked by a 2,6-dimethylenepyridine bridge, and the pyridine nitrogen is not coordinated at tungsten. Complex 2 is the first example of bisalkylated tetrathiometalates, the mononuclear structure of which is stabilized by coordination of the pyridine nitrogen.