SYNTHESIS, NMR-STUDIES AND MOLECULAR-STRUCTURES OF [(PHSSN)(2)(CH2)(3)](2) AND [PHSN(S(2)CNET(2))](2)(S)(CH2)(3)

Reaction of bis(dichlorophenylstannyl)propane (PhCl(2)Sn)(2)(CH2)(3) w ith Na2S gives the dimeric compound [(PhSSn)(2)(CH2)(3)](2) (1) which has been shown by X-ray crystallography to contain six-membered SnC3Sn S rings as well as eight-membered Sn4S4 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, resul ting in the formation of other geometrical isomers. The compound [Phsn (s(2)CNEt(2))](2)(s)(CH2)(3) (2) exists as the cis-isomer and contains six-membered SnC3SnS rings in the solid state. In solution, 2 exists as a mixture of cis-and trans-isomers.