Abstract
The shortening of partly multiple M–Te (M = Mn, Fe, Co, Cr or W) bonds is observed for two classes of organometallic compounds: (1) formally electron-deficient species with additional donor–acceptor interaction between Te lone pairs and half-occupied d-orbitals of M; (2) formally electron-saturated species having additional dative interaction between M lone pairs and LUMO of Te. These compounds could be prepared by two main methods: (a) interaction of [CpMn(CO)2PhC(O)−]Li+ with Te proceeds via formation of intermediate {[CpMn(CO)2]2Te}2− which is further transformed into binuclear complex [CpMn(CO)2]2Te(CH2Ph)2 or into trinuclear ditelluride cluster [CpMn(CO)2]3Te2 on one hand or to mixed-metal monotelluride clusters [CpMn(CO)2]2TeM(CO)5 on another hand. (b) treatment of Fe(CO)5, CpMn(CO)2(THF) or Me4C4Co(CO)2I with [PhTeI]4, PhTeI3 or PhTeI2HC = CPhI results in different PhTeI-containing complexes of Fe, Mn or Co. The molecular structures of all new compounds were studied by means of X-ray diffraction analyses and the mechanism of M–Te bond shortening is discussed.
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Acknowledgments
The authors thank Dr. K.A. Lyssenko (A.N. Nesmeyanov Institute of Organoelement Compounds, RAS) for X-ray diffraction study and Russian Foundation of Fundamental Research (grant №06-03-32891), District of Chemistry and Materials Sciences of RAS (grant OKh 1.4) and Presidium of RAS (grant 8P15) for financial support.
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Proceeding of the international workshop on transition metal clusters, 3–5 July 2008, Université de Rennes 1, Campus de Beaulieu, Rennes, France.
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Pasynskii, A.A., Torubaev, Y.V., Grigor’ev, V.N. et al. The Shortened Transition Metal–Tellurium Bonds in Organometallic Clusters. J Clust Sci 20, 193–204 (2009). https://doi.org/10.1007/s10876-008-0227-0
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DOI: https://doi.org/10.1007/s10876-008-0227-0