摘要:
The compound GeMe(2)H(2) reacted with [Fe-2{mu(4)-Ge[Co-2(CO)(7)]}(2)(CO)(7)], to replace only the mu-CO on the Co-Co bonds, forming [Fe{mu(4)-Ge[Co-2(CO)(6)(mu-GeMe(2))]}(2)(CO)(7)]. The monosubstituted product [Fe-2{mu(4)-Ge[Co-2(CO)(7)]}{mu(4)-Ge[Co-2(CO)(6)(mu-GeMe(2))]}(CO)(7)] and similar products from GeMeH(3) are also indicated. A crystal structure analysis of [Fe-2{mu(4)-Ge[Co-2(CO)(6)(mu-GeMe(2))]}(2)(CO)(7)] confirmed an extended core of six GeM(2) triangles, linked through the germanium apices and the Co-Co or Fe-Fe edges. Heating [Fe-2{mu(4)-Ge-[Co-2(CO)(7)]}(2)(CO)(7)] at 50-60 degrees C for 4-7 weeks yielded as major product [Fe2Co4Ge2(CO)(n)] (n = 19 or 20) whose spectroscopic properties indicate a square-bipyramidal cluster with a Fe2Co2Ge2 core. The minor product was the crystallographically characterised closo-trigonal-bipyramidal cluster [Fe-3{mu(3)-GeCo(CO)(4)}(2)-(CO)(9)] with a Ge2Fe3 core.