Phosphaallyl complexes of Ru(<scp>ii</scp>) derived from dicyclohexylvinylphosphine (DCVP)
作者:Dorota Duraczyńska、John H. Nelson
DOI:10.1039/b413446j
日期:——
The complexes [(η5-RC5H4)Ru(CH3CN)3]PF6
(R = H, CH3) react with DCVP (DCVP = Cy2PCHCH2) at room temperature to produce the phosphaallyl complexes [(η5-C5H5)Ru(η1-DCVP)(η3-DCVP)]PF6
(1) and [(η5-MeC5H4)Ru(η1-DCVP)(η3-DCVP)]PF6
(2). Both compounds react with a variety of two-electron donor ligands displacing the coordinated vinyl moiety. In contrast, we failed to prepare the phosphaallyl complexes [(η5-C5Me5)Ru(η1-DCVP)(η3-DCVP)]PF6, [(η5-MeC5H4)Ru(CO)(η3-DCVP)]PF6 and [(η5-C5Me5)Ru(CO)(η3-DPVP)]PF6
(DPVP = Ph2PCHCH2).The compounds [(η5-MeC5H4)Ru(CO)(CH3CN)(DPVP)]PF6 and [(η5-C5Me5)Ru(CO)(CH3CN)(DPVP)]PF6
(12) react with DMPP (3,4-dimethyl-1-phenylphosphole) to undergo [4 + 2] Diels–Alder cycloaddition reactions at elevated temperature. Attempts at ruthenium catalyzed hydration of phenylacetylene produced neither acetophenone nor phenylacetaldehyde but rather dimers and trimers of phenylacetylene. The structures of the complexes described herein have been deduced from elemental analyses, infrared spectroscopy, 1H, 13C1H}, 31P1H} NMR spectroscopy and in several cases by X-ray crystallography.
[(η5-RC5H4)Ru(CH3CN)3]PF6 (R = H, CH3) 复合物在室温下与DCVP (DCVP = Cy2PCHCH2) 反应,生成膦杂烯丙基复合物 [(η5-C5H5)Ru(η1-DCVP)(η3-DCVP)]PF6 (1) 和 [(η5-MeC5H4)Ru(η1-DCVP)(η3-DCVP)]PF6 (2)。这两种化合物均能与多种二电子供体配体反应,取代配位的乙烯基部分。相比之下,我们未能制备出膦杂烯丙基复合物 [(η5-C5Me5)Ru(η1-DCVP)(η3-DCVP)]PF6, [(η5-MeC5H4)Ru(CO)(η3-DCVP)]PF6 和 [(η5-C5Me5)Ru(CO)(η3-DPVP)]PF6 (DPVP = Ph2PCHCH2)。化合物 [(η5-MeC5H4)Ru(CO)(CH3CN)(DPVP)]PF6 和 [(η5-C5Me5)Ru(CO)(CH3CN)(DPVP)]PF6 (12) 在高温下与DMPP (3,4-二甲基-1-苯基膦杂环) 反应,发生[4 + 2] Diels-Alder环加成反应。尝试使用钌催化苯乙炔的水合反应,既没有生成乙酰苯也没有生成苯乙醛,而是生成了苯乙炔的二聚体和三聚体。本文所述复合物的结构已通过元素分析、红外光谱、1H、13C1H}、31P1H}核磁共振光谱以及在几种情况下的X射线晶体学推断得出。