The reaction of diphenylphosphine, PPh2H, with an alkyne-bridged dicobalt carbonyl complex; the synthesis crystal structure and reactivity of the complex [CO2{μ-C(CO2Me)CHCO2Me}(μ-PPh2)(CO)4]
作者:Andrew J.M. Caffyn、Martin J. Mays、Gráinne Conole、Mary McPartlin、Harold R. Powell
DOI:10.1016/0022-328x(92)85029-v
日期:1992.9
between [Co2(μ-C2(CO2Me)2)(CO)6] and diphenylphosphine gives the mono- and di-substituted complexes [Co2μ-C2}(CO2Me)2(CO)6-n(PPh2H)n] [n = 1 (1), 2 (2)]. Thermolysis of (1) leads to phosphorus-hydrogen bond cleavage and formation of the phosphido-, vinyl-bridged complex [Co2μ-C(CO2Me)CHCO2Me}(μ-PPh2(CO)4] (3) together with the trinuclear cobalt complex [Co3μ-C2(CO2Me)2}(μ-PPh2(CO)7 (4). An X-ray
之间的反应[CO 2(μ-C 2(CO 2 Me)的2)(CO)6 ]和二苯基膦给出单-和二-取代的配合物[CO 2 μ-C 2}(CO 2 Me)的2( CO)6- n(PPh 2 H)n ] [ n = 1(1),2(2)]。(热分解1)导致磷-氢键断裂和形成的phosphido-,乙烯基桥连的络合物[CO 2 μ-C(CO 2 Me)的CHCO 2我}(μ-PPH 2(CO)4 ](3)与三核钴络合物[CO一起3 μ-C 2(CO 2 Me)的2 }(μ-PPH 2(CO)7(4)。一种X射线的衍射研究3表明一个乙烯基配位体的甲基羧酸酯取代基的一部分经氧配位成钴,形成几乎平面的五元金属环,描述了(3)与叔膦和与苯乙炔的反应。