Step-wise nucleophilic substitution of bis(cyclopentadienyl)-tin(II); synthesis and structural characterisation of [{Sn(η3-C5H5)[µ-NC(NMe2)2]}2] and [{Sn[S(CH2)3SC(R)][µ-NC(NMe2)2]}2](R = H or SiMe3)

Abstract

Nucleophilic substitution of Sn(C₅H₅)₂ with LiNC(NMe₂)₂ led to the monosubstitution of only one C₅H₅ ligand yielding dimeric [{Sn(η³-C₅H₅)[µ-NC(NMe₂)₂]}₂] in which the remaining C₅H₅ group can be further substituted by reactions with lithiated 1,3-dithianes to give the dimeric mixed-ligand imino–1,3-dithiane complexes [{Sn[[graphic omitted](R)][µ-NC(NMe₂)₂]}₂](R = H or SiMe₃).