Synthesis and Structural Characterization of [κ<sup>3</sup>-<i>B,S,S</i>-B(mim<sup>R</sup>)<sub>3</sub>]Ir(CO)(PPh<sub>3</sub>)H (R = Bu<sup>t</sup>, Ph) and [κ<sup>4</sup>-B(mim<sup>Bu</sup><sup><sup>t</sup></sup>)<sub>3</sub>]M(PPh<sub>3</sub>)Cl (M = Rh, Ir): Analysis of the Bonding in Metal Borane Compounds
作者:Victoria K. Landry、Jonathan G. Melnick、Daniela Buccella、Keliang Pang、Joseph C. Ulichny、Gerard Parkin
DOI:10.1021/ic051975t
日期:2006.3.1
iridium and rhodium complexes that feature M-->B dative bonds, namely [kappa(3)-B,S,S-B(mim(R))3]Ir(CO)(PPh3)H (R = But, Ph) and [kappa4-B(mim(Bu)t)3]M(PPh3)Cl (M = Rh, Ir), has been synthesized via (i) the reactions of Ir(PPh3)2(CO)Cl with [Tm(Bu)t]Tl and [Tm(Ph)]Li and (ii) the reactions of (COD)M(PPh3)Cl with [Tm(Bu)t]K. The complexes have been structurally characterized by X-ray diffraction, thereby
一系列具有M-> B导数键的铱和铑配合物,即[kappa(3)-B,S,SB(mim(R))3] Ir(CO)(PPh3)H(R =但是, Ph)和[kappa4-B(mim(Bu)t)3] M(PPh3)Cl(M = Rh,Ir),是通过(i)Ir(PPh3)2(CO)Cl与[ Tm(Bu)t] T1和[Tm(Ph)] Li,以及(ii)(COD)M(PPh3)Cl与[Tm(Bu)t] K的反应。该复合物已通过X射线衍射进行了结构表征,从而证明了每个复合物中均存在M→B导数键。这些络合物中M-> B相互作用的性质已通过计算方法得到了解决,这些计算方法表明金属中心具有ad(6)构型。d(6)的配置与通过使用化合价确定d(n)()的方法预测的值一致,但不符合使用氧化数预测的d8构型。因此,即使可以将B(mim(R))3视为中性的闭壳配体,但通过硼与ad(n)过渡金属的配位也会形成络合物,其中金属中心具有ad(n