New mixed-ligand isocyanide diphosphine ruthenium(II) derivatives. Synthesis of a potential metal-containing tetradentate ligand
作者:Javier Ruiz、V�ctor Riera、Marilin Vivanco
DOI:10.1039/dt9950001069
日期:——
Reaction of trans-[RuCl2(CNPh)(4)] with an excess of Ph(2)PCH(2)PPh(2) (dppm) in refluxing toluene gave two complexes cis,cis,trans-[RUCl(2)(CNPh)(2)(dppm-P)(2)] 1 and mer- [RuCl(CNPh)(3)(dppm)]Cl 2a; whereas in the reaction of trans-[RuCl2(CNBu(t))(4)] with dppm under the same conditions only mer-[RuCl-(CNBu(t))(3)(dppm)]Cl 2b was obtained. Complex 1 reacted with TlPF6 in CH2Cl2 to give [RuCl(CNPh)(2)(dppm) (dppm-P)]PF6 3, a cationic complex containing both a monodentate and a chelated dppm ligand. Complex 1 is remarkable in having two monohapto dppm ligands and can be used in the synthesis of heterometallic species. Thus, treatment of 1 with AgClO4 or HgCl2 gave the heterometallic complex [(dppm)(PhNC)(2)ClRu(mu-dppm)AgCl]ClO4 4 or [(dppm)(PhNC)(2)ClRu-(mu-dppm)HgCl2}(2)] Cl-2 5 respectively.
Complexes of Ruthenium(II) with Unsymmetrical Diphosphines and Diphosphinomethanides. A Way to Synthesize Chiral Metallodiphosphines
作者:Marta E. G. Mosquera、Javier Ruiz、Víctor Riera、Santiago Garcia-Granda、Miguel A. Salvadó
DOI:10.1021/om000097y
日期:2000.12.1
Ruthenium(II) complexes with the unsymmetrical diphosphinomethanide [(PPh2CHPBu2)-Bu-t](-) containing isocyanides and chiral amines as ancillary ligands were prepared, and the molecular structure of [Ru((CNBu)-Bu-t)(4)(PPh2CHPBu2)-Bu-t)}](+) was studied by X-ray crystallography. The reactivity of the coordinated methanide toward [AuCl(PPh3)] was investigated, leading to the stereoselective formation of the chiral metallodiphosphine [PPh2CH(AuPPh3)(PBu2)-Bu-t].