SYNTHESIS AND CRYSTAL-STRUCTURE OF (ET(4)N)[(MU(3)-SBI)FE-3(ETA(5)-C5H5)(CO)(10)]

Crystal structure of (Et(4)N)[{mu(3)-SbI}Fe(3)Cp(CO)(10)] was determin ed by X-ray diffraction analysis. The compound was synthesized by the reaction between (Et(4)N)(2)[Fe-2(CO)(8)] and CpFe(CO)(2)SbI2 in a THF solution with cooling in an argon atmosphere. The crystals are monocl inic, a = 12.792(2), b = 14.152(3), c = 17.373(3) Angstrom, beta = 92. 32(1)degrees, V-cell = 3143(1) Angstrom(3), space group P2(1)/n, Z = 4 , d(calc) = 1.885 g/cm(3), Syntex P2(1), lambda CuKalpha radiation, R( F) = 0.0744 for 877 F-hkl > 6 sigma(F-hkl). The data were corrected fo r crystal decomposition according to the drop in the intensities of co ntrol reflections (by 23% during 29 h X-ray exposure). In the cluster anion, the Sb-Fe distances (ave. 257(1) Angstrom and the I-Sb-Fe and F e-Sb-Fe angles (ave. 102.7(6) and 115.4(4)degrees) have virtually the same values as in other known complexes containing HalSbFe(3) and SbFe 4 fragments, The Fe...Fe distances of 4.312-4.369 Angstrom indicate th at the metal-metal bonds are absent.