THE SYNTHESIS AND X-RAY STRUCTURE OF A PHENOXIDE-BRIDGED HETEROBIMETALLIC ANION, W(CO)5OPH(CR(CO)3)-, AND ITS REACTIVITY WITH CARBON-DIOXIDE AND CARBONYL SULFIDE

The heterobimetallic complex, [Et4N][W(CO)5OPh(Cr(CO)3)] (1), Was prepared by the reaction of [Et4N][W(CO)5CH3] and (eta6C6H5OH)Cr(CO)3 in tetrahydrofuran. Complex 1 crystallizes from THF/hexane in the space group P2(1) with unit cell dimensions a = 7.036(2) angstrom, b = 11.766(4) angstrom, c = 15.460(4) angstrom, beta = 94.83(2)-degrees, V = 1275.3(7) angstrom3, and D(calcd) = 1.779 g cm-3 . The structure was refined to R = 0.084 and R(w) = 0.091 for 1136 reflections having F > 3.0sigma(F(o)). Complex 1 was completely inert towards carbon dioxide, even at high pressure (900 psi), but readily reacted with carbonyl sulfide to afford the thiocarbonate derivative, [Et4N][W(CO)5S-C(O)-OPh(Cr(CO)3)].