86847-08-7Relevant academic research and scientific papers
Mononuclear complexes of copper(I) and silver(I) featuring the metals exclusively bound to carbon. Synthesis and structure of (η 5-pentamethylcyclopentadienyl)[(triphenylphosphonio)- (triphenylphosphoranylidene)methyl]copper(I)
Zybill,Müller
, p. 2489 - 2494 (2008/10/08)
Hexaphenylcarbodiphosphorane, (C6H5)3P=C=P(C6H5) 3, forms monomeric 1:1 adducts [(C6H5)3-P=C=P(C6H5) 3]MCl with CuCl and AgCl. Chloride displacement by the cyclopentadienides M′C5R5 (M′ = Li Na; R = H, CH3) affords the compounds (η5-C5R5)M[(C6H 5)3P=C=P(C6H5)3]. Alternatively, (η5-C5R5)Cu[(C6H 5)3P=C=P(C6H5)3] (R = CH3) is accessible by a stepwise reaction of M′C5R5 with CuCl and (C6H5)3P=C=P(C6H5) 3. The intermediate cationic copper(I) half-sandwich complex [C5R5Cu+] has been trapped with triphenylphosphine. The structure of (η5-C5(CH3)5)Cu[(C 5H5)3P=C=P(C6H5) 3] shows the Cu(I) center to be linearly coordinated by the Cp* ligand and the ylidic C atom of hexaphenylcarbodiphosphorane. The Cu-C(ylide) bond (1.922 (6) A?) is comparable to other 2c-2e bonds. (Crystals of (η5-C5(CH3)5)Cu[(C 6H5)3P=C=P(C6H5) 3] are monoclinic of space group P21/n with a = 11.495 (1) A?, b = 17.147 (2) A?, c = 20.181 (2) A?, β = 101.11 (1)°, V = 3903.2 A?3, and Z = 4. Refinement of 286 parameters on 3499 observables produced Rw = 0.054, w = 1/σ2(Fo).)
