作者:J. Geicke、I.-P. Lorenz、M. Engel、K. Polborn
DOI:10.1016/s0020-1693(97)05785-x
日期:1998.3
One PPh3 group of CpRu(PPh3)(2)Cl is easily substituted by PPh2H to give the asymmetrical complex CpRu(PPh3)(PPh2H)Cl (1) in a very good yield. Attempts to form the lambda(4)-phosphanediyl complex CpRu(PPh3)=PPh2 (1') by selective dehydrohalogenation of 1 failed. However, by using one equivalent of the chelating diphosphine dppa two PPh3 ligands are substituted to yield CpRu(dppa)Cl (2). With an excess of dppa the reaction yielded the N-iminophosphoranyl-substituted dppa complex CpRu(PPh2)(2)NPPh2=NH}Cl (3) and PPh2H. H-1, C-13H-1} and P-31H-1} NMR, IR and mass spectra of 1-3 are given. Crystals of 1 are monoclinic, space group P2(1)/c with a = 11.8446(12), b = 14.502(3), c = 17.504(2) Angstrom and beta = 95.55(9)degrees, Z = 4 and R = 0.0270 for 4299 observed reflections. Crystals of 2 are monoclinic, space group P2(1)/c with a = 10.7616(14), b = 18.263(4), c = 13.859(2) Angstrom and beta = 110.41(1)degrees, Z = 4 and R = 0.0327 for 4227 observed reflections. (C) 1998 Elsevier Science S.A.