Abstract

The reactions of dicobaltoctacarbonyl with Cl3BN(C2H5)3, Br3BN(C2H5)3 and Br3AlN(C2H5)3 in benzene at 60° lead to the methylidynetricobalt-nonacarbonyl cluster compounds Co3(CO)9COBCl2N(C2H5)3, Co3(CO)9COBBr2N(C2H5)3 and Co3(CO)9COAlBr2N(C2H5)3. The IR-, 11B-, ESR- and mass spectra are discussed. The reaction of AlBr3 with Co2(CO)8 leading to the cluster system co3(CO)9COAlBr2·AlBr3 via the addition compound Co2(CO)8·AlBr3 allows conclusions on the mechanism of the formation of methylidynetricobalt-nonacarbonyl cluster compounds.

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