Phosphonate−Stannylene Coupling in the Reactions of the Anion [Mn<sub>2</sub>{μ-OP(OEt)<sub>2</sub>}{μ-P(OEt)<sub>2</sub>}(CO)<sub>6</sub>]<sup>2-</sup> with SnR<sub>2</sub>Cl<sub>2</sub> (R = Bu, Ph)
收藏资源简介：
Reaction of Na2[Mn2{μ-OP(OEt)2}{μ-P(OEt)2}(CO)6] with SnR2Cl2 (R = Bu, Ph) in tetrahydrofuran leads finally to the stannyl-bridged heptacarbonyl compounds [Mn2{μ-Sn:Sn,P-SnR2OP(OEt)2}{μ-P(OEt)2}(CO)7] or, in the presence of PR‘3 (R‘ = Ph, p-tol, Cy, iPr), to the corresponding hexacarbonyl complexes [Mn2{μ-Sn:Sn,P-SnR2OP(OEt)2}{μ-P(OEt)2}(CO)6(PR‘3)]. Several intermediates are involved in these reactions, which include the expected initial stannylene product [Mn2(μ-SnR2){μ-OP(OEt)2}{μ-P(OEt)2}(CO)6], detected when R = Bu, and unstable solvent adducts. The products isolated all display a one-electron-donor stannyl bridging group derived from the O−Sn coupling between the phosphonate and stannylene ligands present in the initial intermediate, as confirmed by an X-ray study on [Mn2{μ-Sn:Sn,P-SnPh2OP(OEt)2}(CO)6(PiPr3)] and the spectroscopic (IR, 1H and 31P NMR) analysis of the new complexes.
