Perfluormethyl-element-liganden XIII [1]: ein neuer weg zu zweikernkomplexen des typs M2(CO)8E(CF3)2X (M = Mn,Re) |
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| Authors: | J Grobe W Mohr |
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| Institution: | Eduard Zintl-Institut der Technischen Hochschule Darmstadt, D 6100 Darmstadt, Hochschulstaße 4 West-Germany |
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| Abstract: | The reactions of M(CO)5X ( M = Mn, Re; X = Cl, Br, I) with E2(CF3)4 (E = P, As) between 50 and 90°C yield binuclear complexes of the type M2(CO)8E(CF3)2X with two different bridging ligands, the formation of which is influenced by M (Mn > Re), E (P > As) , and X(I > Br > Cl). The main by-product is the symmetrical system M2(CO)8E(CF3)2]2, which is however not formed by the partial replacement of X by E(CF3)2 since this reaction requires temperatures above 120°C. The observed products can be explained by a three-step reaction path starting with the cleavage of E2(CF3)4 followed by the subtitution of a cis-CO group in the M(CO)5X component by M(CO)5E(CF3)2 and the ring closure. |
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