14692-78-5Relevant academic research and scientific papers
Syntheses of gold-manganese and gold-rhenium clusters, and + (M = Mn, Re), and the crystal structure of BF4
Nicholson, Brian K.,Bruce, Michael I.,Shawkataly, Omar bin,Tiekink, Edward R. T.
, p. 411 - 418 (2007/10/02)
The specific additions of one, three or four Ph3PAu groups to - (M = Mn, Re) are described.Thus - in THF reacts with BF4 to give BF4.An X-ray crystal structure of the M = Mn example shows the cation to have a trigonal bipyramidal Au4Mn core with the Mn in an equatorial site.The previously known neutral (Ph3PAu)3M(CO)4 clusters are formed by addition of two Ph3PAu groups, using the mixed reagent BF4/, to Ph3PAuM(CO)5, which itself is readily prepared from - and Ph3PAuCl.
Cluster chemistry. 62. Preparation of the heptanuclear clusters Ru5M2(μ5-C2PPh2)(μ-PPh2)(CO)12 (PPh3)2 (M = Ag, Au). X-ray structure of Au2Ru5(μ5-C2PPh2)(μ-PPh2) (PPh3)2{P(OEt)3}
Bruce,Liddell,Williams,Nicholson
, p. 2903 - 2909 (2008/10/08)
The heptanuclear title complex was obtained from reactions between Ru5(μ5-C2PPh2)(μ-PPh2)(CO)13 and a mixture of [O{Au(PPh3)}3][BF4] and [ppn][M(CO)n] (M = Co, n = 4; M = Mn, n = 5) or by reduction (Na/Hg or K[HBBu38]) or the Ru5 complex and treatment with AuCl(PPh3); the silver analogue was made by the latter route. The structure of a P(OEt)3 derivative of the Au2Ru5 cluster was determined. The metal core consists of an Ru/AuRu2/Au trigonal bipyramid, two edges of which are bridged by Ru atoms. Addition of the Au2(PPh3)2 unit has resulted in cleavage of one of the Ru-Ru bonds present in the original Ru5 cluster. Au2Ru5(μ5-C2PPh2)(μ-PPh2)(CO)11 (PPh3)2{P(OEt)3} is triclinic, space group P1?, with a = 14.031 (15) A, b = 16.741 (4) A, c = 18.721 (6) A, α = 98.64 (2)°, β = 97.61 (6)°, γ = 98.04 (6)°, and Z = 4; 6848 data were refined to R = 0.0595 and Rw = 0.0617.
A Radical-Chain Mechanism for Dinuclear C-H Bond Formation
Edidin, Robin T.,Norton, Jack R.
, p. 948 - 953 (2007/10/02)
Both the formation of (Ph3PAu)2Os(CO)4 from Ph3PAuCH3 and H2Os(CO)4 and the formation of (Ph3PAu)Mn(CO)5 from Ph3PAuCH3 and HMn(CO)5 occur by radical-chain mechanisms.The chain carriers are .Mn(CO)5 and .Os(H)(CO)4, respectively, arising from hydrogen atom abstraction from the initial hydrides.Photolysis of a small amount of the appropriate dimer (Mn2(CO)10 or H2Os2(CO)8) generates the chain carrier and thus initiates the reaction.No such reaction occurs between Ph3PAuCH3 and HRe(CO)5, even in the presence of substantial amounts of .Re(CO)5.The formation of H2Os(CO)3PPh3 from Ph3P and H2Os(CO)4 also occurs by a radical-chain mechanism with .Os(H)(CO)4 as the chain carrier, and the reactions of Ph3PAuCH3 and Ph3P with H2Os(CO)4 can be simultaneously initiated.
