Synthesis and structure of new homo-and heteroligand carbonyl cluster complexes with [Fe3(μ3-Q)(μ3-X)] core (Q = Se, Te; X = S, As) |
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| Authors: | N A Pushkarevsky D A Bashirov T G Terent’eva A V Virovets E V Peresypkina H Krautscheid S N Konchenko |
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| Institution: | (1) Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3, Novosibirsk, 630090, Russia;(2) Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia;(3) Institute of Inorganic Chemistry at Leipzig University, Germany |
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| Abstract: | New cluster complexes of iron Fe3Q(AsCp*)(CO)9] (Q = Se, Te, Cp* = C5(CH3)5) are synthesized with the square pyramidal cluster core Fe3QAs. A suitable procedure of the synthesis of known heterochalcogenide Fe3QS(CO)9] clusters is developed. Monosubstituted Fe3Q(AsCH3)(CO)8(PPh3)] and disubstituted Fe3Q(AsCH3)(CO)7(PPh3)2] clusters formed in the reactions of Fe3Q(AsCH3)(CO)9] with PPh3 are studied. In monosubstituted clusters, the phosphine ligand is coordinated in the axial position to the Fe atom in the base of the Fe3QAs square pyramid, while in disubstituted clusters, both phosphine ligands coordinate the Fe atoms in the pyramid base, one ligand being in the axial and another one in the equatorial position. The NMR data support the possibility of migration of the Fe-Fe bonds in a triangle in the cluster core in the case of disubstituted clusters. |
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