Synthesis, NMR studies and molecular structures of [(PhSSn) 2(CH 2) 3] 2 and [PhSn(S 2CNEt 2)] 2(S)(CH 2) 3

Abstract

Reaction of bis(dichlorophenylstannyl)propane (PhCl 2Sn) 2(CH 2) 3 with Na 2S gives the dimeric compound [(PhSSn) 2(CH 2) 3] 2 ( 1) which has been shown by X-ray crystallography to contain six-membered SnC 3SnS rings as well as eight-membered Sn 4S 4 rings. NMR studies show that 1 is stable in toluene solution with the same structure as that in the solid state, but addition of chloride ion brings about exchange, resulting in the formation of other geometrical isomers. The compound [PhSn(S 2CNEt 2)] 2(S)(CH 2) 3 ( 2 exists as the cis-isomer and contains six-membered SnC 3SnS rings in the solid state. In solution, 2 exists as a mixture of cis-and trans-isomers.