88474-43-5Relevant academic research and scientific papers
The Synthesis, Reactivity, and Crystal and Molecular Structure of , an Unusual 50-Electron Closed Trinuclear Cluster Derivative of Rhodium
Haines, Raymond J.,Steen, Nick D. C. T.,English, Robin B.
, p. 2229 - 2234 (1983)
The reaction of 2> with PPh2H in benzene affords the mononuclear complex for a molar ratio of 1:4 and the trinuclear derivative , for a molar ratio of 1:2.The structure of the trinuclear derivative has been determined by X-ray crystallography.It crystallises in the monoclinic space group P21/n, with a=12.461(5), b=32.867(5), c=11.149(5) Angstroem, β=99.29(1) deg, Z=4, and R=0.085.The metal atoms adopt a triangular configuration with each edge of the triangle being bridged by a diphenylphosphido-group as well as by either a chloro or a carbonyl group.In spite of this compound beign a 50-electron system, all of the Rh-Rh distances correspond with those normally associated with a formal rhodium-rhodium bond.The chloro-groups in this compound can be extracted as radicals by the addition of NEt2H, affording, in the presence of CO, , or displaced as chloride ions by treatment of the complex with AgSbF6; the former reaction is a reversible process with dissolution of in CCl4 resulting in the regeneration of the title complex. is only moderately stable in solution and converts slowly to an insoluble species formulated as n>.
