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Synthesis of [Pt(SnBut3)(IBut)(μ-H)]2, a Coordinatively Unsaturated Dinuclear Compound which Fragments upon Addition of Small Molecules to Form Mononuclear Pt–Sn Complexes

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Figshare2016-12-16 更新2026-04-29 收录
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The reaction of Pt­(COD)2 with one equivalent of tri-tert-butylstannane, But3SnH, at room temperature yields Pt­(SnBut3)­(COD)­(H)­(3) in quantitative yield. In the presence of excess But3SnH, the reaction goes further, yielding the dinuclear bridging stannylene complex [Pt­(SnBut3)­(μ-SnBut2)­(H)2]2 (4). The dinuclear complex 4 reacts rapidly and reversibly with CO to furnish [Pt­(SnBut3)­(μ-SnBut2)­(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(SnBut3)­(IBut)­(μ-H)]2 (6). Complex 6 reacts with CO, C2H4, and H2 to give the corresponding mononuclear Pt complexes Pt­(SnBut3)­(IBut)­(CO)­(H)­(7), Pt­(SnBut3)­(IBut)­(C2H4)­(H)­(8), and Pt­(SnBut3)­(IBut)­(H)3 (9), respectively. The reaction of IBut with the complex Pt­(SnBut3)2(CO)2 (10) yielded an abnormal Pt-carbene complex Pt­(SnBut3)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(SnBut3)­(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.
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2016-12-16
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