Co-ordination chemistry of heavy-atom group IV donors, and the crystal and molecular structure of [(Me3Si)2CH]2SnCr(CO)5

Abstract

A bulky monomeric tin(II) alkyl [R₂Sn, R =(Me₃Si)₂CH] is an example of a new type of ligand in which the ligating centre is a heavy Group IV atom; examples of new complexes include (i) tin(II) derivatives in which tin is three-co-ordinate in a planar environment, as confirmed (X-ray) for [R₂SnCr(CO)₅] and (ii) tin(IV) species resulting from R₂Sn insertion into M–H, M–alkyl, M–Cl, or M–M bonds, e.g., [R₂Sn{Fe(CO)₄}₂].