SCHEDULED MAINTENANCE
Methoxylation of the Re–Re bond in [Re2(CO)10] by methanol under ambient conditions
Abstract
Addition of 1,1′-bis(diphenylphosphino)ferrocene (dppf) to an ‘activated mixture’ containing [Re2(CO)10] and Me3NO·2H2O in thf–MeOH (2 : 1) in the molar ration 1.0 : 1.0 : 2.4 at 25 °C gives [Re2(µ-OMe)2(CO)6(µ-dppf)] in 34% yield. The molecular structure was determined by X-ray diffraction analysis: monoclinic, space group P21/n, a= 13.646(1), b= 18.440(2), c= 17.850(4)Å, β= 97.69(1)°, final R 0.030 for 3992 observations. It contains two tricarbonylrhenium(I) moieties bridged by dppf and two methoxo ligands. The cp–Fe–cp (cp =η-C5H5) axis of dppf makes a projection of 53.5° onto the Re–Re axis.
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