The reaction of Pt(COD)2 with one equivalent of tri-tert-butylstannane, But 3SnH, at room temperature yields Pt(SnBut 3)(COD)(H)(3) in quantitative yield. In the presence of excess But 3SnH, the reaction goes further, yielding the dinuclear bridging stannylene complex [Pt(SnBut 3)(μ-SnBut 2)(H)2]2 (4). The dinuclear complex 4 reacts rapidly and reversibly with CO to furnish [Pt(SnBut 3)(μ-SnBut 2)(CO)(H)2]2 (5). Complex 3 reacts with N,N′-di-tert-butylimidazol-2-ylidene, IBut, at room temperature to give the dinuclear bridging hydride complex [Pt(SnBut 3)(IBut)(μ-H)]2 (6). Complex 6 reacts with CO, C2H4, and H2 to give the corresponding mononuclear Pt complexes Pt(SnBut 3)(IBut)(CO)(H)(7), Pt(SnBut 3)(IBut)(C2H4)(H)(8), and Pt(SnBut 3)(IBut)(H)3 (9), respectively. The reaction of IBut with the complex Pt(SnBut 3)2(CO)2 (10) yielded an abnormal Pt-carbene complex Pt(SnBut 3)2(aIBut)(CO) (11). DFT computational studies of the dimeric complexes [Pt(SnR3)(NHC)(μ-H)]2, the potentially more reactive monomeric complexes Pt(SnR3)(NHC)(H) and the trihydride species Pt(SnBut 3)(IBut)(H)3 have been performed, for NHC = IMe and R = Me and for NHC = IBut and R = But. The structures of complexes 3-8 and 11 have been determined by X-ray crystallography and are reported.
ASJC Scopus subject areas
- Inorganic Chemistry
- Physical and Theoretical Chemistry