80031-87-4Relevant academic research and scientific papers
Electrochemical generation of stable cations of (arene)tricarbonyichromium complexes. Studies on thenoninteraction of the tricarbonyichromium groups in bis and tris complexes
Rieke, Reuben D.,Tucker, Indu,Milligan, Stuart N.,Wright, Dennis R.,Willeford, Bennett R.,Radonovich, Lewis J.,Eyring
, p. 938 - 950 (2008/10/08)
Complexes of the type (CH3)2Sn[ArCr(CO)3]2 were studied by cyclic voltammetry. The compounds can be made to undergo chemically reversible oxidation upon judicious choice of conditions and modification of Ar. The persistence of the cations seems to be a function of the steric bulk around the phenyl rings. Oxidation involves one electron per tricarbonylchromium group. The tricarbonylchromium moieties are essentially noninteracting and therefore adhere to the Bard-Anson-Saveant model. The same results are found for the bis and tris complexes of methyltriphenyltin where a dication and trication are formed, respectively. The structure of (CH3)2Sn[2,4,6-(CH3)3C 6H2Cr(CO)3]2 was determined from 5287 observed diffractometer data and refined to an R value of 4.4%. The compound crystallizes in space group P2l/c with Z = 4 and lattice constants of a = 15.514 (2) ?, b = 13.026 (2) ?, c = 15.709 (2) ?, and β= 119.51 (1)°. The structure consists of a tin atom that is bonded to two methyl and two mesityl groups in a distorted tetrahedral geometry. Each mesityl group is also bonded to a Cr(CO)3 moiety in a η6 fashion. The average Sn-C(methyl) and Sn-C(mesityl) distances are 2.149 (4) and 2.182 (3) ?, respectively. When the Cr-CO bonds are projected onto the mesityl plane, they eclipse the methyl-substituted ring carbon atoms.
