Abstract
The alkylidyne-metal complexes [CrM{µ-σ:η6-CC6H4(OMe-2)}(O2CCF3)(CO)5L2][M = Mo or W, L2= tmen (Me2NCH2CH2NMe2) or bipy (2,2′-bipyridine)] and [CrM{µ-σ:η6-CC6H4(OMe-2)}(CO)5L]{M = Mo, L =η-C5H5 or HB(pz)3[hydrotris(pyrazol-1-yl)borate]; M = W, L =η-C5H5} have been prepared. In these species the alkylidyne ligand attached to Mo or W is η6-co-ordinated to a Cr(CO)3 group. Several reactions of the complexes [CrM{µ-σ:η6-CC6H4(OMe-2)}(CO)5(η-C5H5)] with low-valent metal compounds have been studied. These have led to the isolation of various heteronuclear metal cluster compounds with bonds between molybdenum or tungsten and platinum, nickel, cobalt, and rhodium. The n.m.r. data for the new products are reported and discussed in relation to the structures proposed.
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