Synthesis of Monomeric Divalent Tin(II) Compounds with Terminal Chloride, Amide, and Triflate Substituents

Monomeric three-coordinate (amidinato)tin chloride [PhC-(NtBu)(2)SnCl] (1) was prepared by the reaction of N,N'-di-tert-butylcarbodiimide, phenyllithium and SnCl2. The metathesis reaction of 1 with AgSO3CF3 and (Me3Si)(2)NLi afforded the formation of PhC(NtBu)(2)SnOTf (Tf = CF3SO2) (2) and PhC(NtBu)(2)SnN(SiMe3)(2) (3). The reductive dehalogenation of 1 with L-selectride resulted in the formation of the four-coordinate homoleptic tin compound Ph2C2(NtBu)(4)Sn (4). Compounds 1, 2, 3, and 4 were characterized by single-crystal structural analysis. Furthermore, 1 was treated with Fe-2(CO)(9) to afford the Lewis acid base adduct 5.