Tellurium as a bridging ligand in cluster synthesis

Pradeep Mathur, Ipe J. Mavunkal, B. H.S. Thimmappa, V. Rugmini, B. B.S. Shastri

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The compounds Fe2(CO)62-Te2) and Fe3(CO)93-Te)2 have served as useful starting materials for the synthesis of several new tellurium bridged complexes. Addition across the Te-Te bond occurs readily. For instance, the room temperature reaction of Fe2(CO)62-Te2) with Ru(CO)4(C2H4) leads to an immediate and almost quantitative formation of the novel mixed-metal cluster Fe2Ru(CO)93-Te)2. The formation of this cluster most likely proceeds via the initial formation of an Fe-Ru bond to give Fe2Ru(CO)93-Te)2. On treatment of the mixed-metal cluster with NaOMe and acidification of the solution, Fe2(CO)62-Te2) is obtained, suggesting that during the formation of Fe2Ru(CO)93-Te)2 from Fe2(CO)62-Te2), the Fe-Fe bond is retained intact. Also, Fe2Ru(CO)93-Te)2 reacts at room temperature with Pt(PPh3)4 to give (CO)6Fe23-Te)2Pt(PPh3)2. Reflux of a benzene solution of Fe2(CO)93-Te)2 within Ru3(CO)12 forms the novel cluster Ru4(CO)10(μ-CO)(μ4-Te)2. This electron-deficient cluster reacts with various phosphines to give substituted derivatives. With PPh3 the tris(triphenylphosphine) derivative Ru3(CO)6(PPh3)33-Te)2 is also obtained at room temperature.

Original languageEnglish
Pages (from-to)395-402
Number of pages8
JournalProceedings of the Indian Academy of Sciences - Chemical Sciences
Issue number3
Publication statusPublished - 01-06-1990

All Science Journal Classification (ASJC) codes

  • Chemistry(all)


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