Phosphine (PH3) complexes of ruthenium, osmium and iridium as precursors of terminal phosphido (PH2) complexes and the crystal structure of [Os(μ2-PH2) Cl(CO) (PPh3)2]2 · (C2H2Cl4)4
作者:D. Scott Bohle、George R. Clark、Clifton E.F. Rickard、Warren R. Roper、Michael J. Taylor
DOI:10.1016/0022-328x(88)80421-2
日期:1988.7
complexes. The ligands Cl−, PMe3, and CO can be substituted for the labile acetonitrile in 9a to give OsCl2(PH3)(CO)(PPh3)212 [OsCl(PH3)(PMe3)(CO)- (PPh3)2]ClO410 and [OsCl(PH3)(CO)2(PPh3)2]ClO411, respectively. Base deprotonates 10 and 11 to give stable isolable terminal phosphido complexes OsCl- (PH2)L(CO)(PPh3)2 (L = CO, 14, L = PMe3, 15, but when 9a is deprotonated, acetonitrile is also lost and a dimeric
稳定的膦配合物MHCl(PH 3)(CO)(PPh 3)2(M = Os,1a,M = Ru,1b和IrHXCl(PH 3)(PPh 3)2(X = H,2,X = Cl,3)是通过用膦代替三(三苯基膦)前体中不稳定的三苯基膦制备的,强酸(例如CH 3 CN中的HClO 4水溶液)裂解1a,1b中的氢化物金属键,得到[MCl(PH 3) (NCCH 3)(CO)(PPh 3)2 ] ClO 4图9a,9b为异构体复合物的混合物。配体氯-,PME 3和CO可取代的不稳定的乙腈在图9a,得到OSCL 2(PH 3)(CO)(PPH 3)2 12 [OSCL(PH 3)(PME 3)(CO) - (PPh 3)2 ] ClO 4 10和[OsCl(PH 3)(CO)2(PPh 3)2 ] ClO 4 11。碱使10和11质子化以得到稳定的可分离终端膦络合物OsCl-(PH 2)L(CO)(PPH