Bimetallic complexes of molybdenum and tungsten with functionalized diphosphines: X-ray crystal structure of [{W(CO)3}(μ-mtppe)]
作者:Mohammed F.M. Al-Dulaymmi、Peter B. Hitchcock、Raymond L. Richards
DOI:10.1016/s0277-5387(00)80681-6
日期:1989.1
The binuclear complexes [M(CO)3}2(μ-diphos)] (M = Mo or W; diphos = mtppm, mtppe or iptppe) (X-ray structure for M = W, diphos = mtppe), [M(CO)4}2 (μ-dppmpe)] and [MBr2(CO)2}2(μ-mtppe)], and the mononuclear compounds [M(CO)4(dbtpe)] and [MoBr2(CO)2(mtppe)] have been prepared.
Mono- and bi-nuclear complexes of rhodium with functionalised diphosphine ligands
作者:Mohammad F. M. Al-Dulaymmi、Adrian Hills、Peter B. Hitchcock、David L. Hughes、Raymond L. Richards
DOI:10.1039/dt9920000241
日期:——
Treatment of [RhCl(PPh3)3] with R2PCH2CH2PR2 (R = C6H4SMc-2 or C6H4SPr 2) gives the ionic complexes [Rh(R2PCH2CH2PR2)]Cl A. When R = C7H4NS (benzothiazolyl) or C8H7N7 (N-methyl-bonzimidazolyl), however, the partially substituted complex [RhCl(PPh3)(R2PCH2CH2PR2)] B result. Treatment of B (R = C7H4NS) with CHCl3 results in oxidation and disproportionation to the salt \ (RhCl)2-(mu-dbtpe)2][RhCl4(dbtpe)]2 C [dbtpe = (C7H6NS)2PCH2CH2P(SNC7H4)2]. X-ray diffraction analysis of C shows the cation to have a structure with a P-P chelated dbtpe ligand on each RhCl unit spanning the two metals by P,N ligation. The anion has regular octahedral co-ordination. Reaction of dbtpe with [RhCl(cod)}2] (cod - cycloocta-1,5-diene) or [RhCl(CO)2}2\ gives [(RhCl)2(mu-dbtpe)2] D which also has two P-P chelated RhCl units linked by P,N ligation, as shown by an X-ray crystal structure analysis. Full spectroscopic details are given for these compounds and their possible inter-relationship is discussed.