Tellurium as a bridging ligand in cluster synthesis

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

Research output: Contribution to journalArticle

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Abstract

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
Volume102
Issue number3
DOIs
Publication statusPublished - 01-06-1990

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Tellurium
Ligands
Metals
Phosphines
Derivatives
Acidification
Benzene
Temperature
Electrons

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Mathur, Pradeep ; Mavunkal, Ipe J. ; Thimmappa, B. H.S. ; Rugmini, V. ; Shastri, B. B.S. / Tellurium as a bridging ligand in cluster synthesis. In: Proceedings of the Indian Academy of Sciences - Chemical Sciences. 1990 ; Vol. 102, No. 3. pp. 395-402.
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abstract = "The compounds Fe2(CO)6(μ2-Te2) and Fe3(CO)9(μ3-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)6(μ2-Te2) with Ru(CO)4(C2H4) leads to an immediate and almost quantitative formation of the novel mixed-metal cluster Fe2Ru(CO)9(μ3-Te)2. The formation of this cluster most likely proceeds via the initial formation of an Fe-Ru bond to give Fe2Ru(CO)9(μ3-Te)2. On treatment of the mixed-metal cluster with NaOMe and acidification of the solution, Fe2(CO)6(μ2-Te2) is obtained, suggesting that during the formation of Fe2Ru(CO)9(μ3-Te)2 from Fe2(CO)6(μ2-Te2), the Fe-Fe bond is retained intact. Also, Fe2Ru(CO)9(μ3-Te)2 reacts at room temperature with Pt(PPh3)4 to give (CO)6Fe2(μ3-Te)2Pt(PPh3)2. Reflux of a benzene solution of Fe2(CO)9(μ3-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)3(μ3-Te)2 is also obtained at room temperature.",
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Tellurium as a bridging ligand in cluster synthesis. / Mathur, Pradeep; Mavunkal, Ipe J.; Thimmappa, B. H.S.; Rugmini, V.; Shastri, B. B.S.

In: Proceedings of the Indian Academy of Sciences - Chemical Sciences, Vol. 102, No. 3, 01.06.1990, p. 395-402.

Research output: Contribution to journalArticle

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T1 - Tellurium as a bridging ligand in cluster synthesis

AU - Mathur, Pradeep

AU - Mavunkal, Ipe J.

AU - Thimmappa, B. H.S.

AU - Rugmini, V.

AU - Shastri, B. B.S.

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N2 - The compounds Fe2(CO)6(μ2-Te2) and Fe3(CO)9(μ3-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)6(μ2-Te2) with Ru(CO)4(C2H4) leads to an immediate and almost quantitative formation of the novel mixed-metal cluster Fe2Ru(CO)9(μ3-Te)2. The formation of this cluster most likely proceeds via the initial formation of an Fe-Ru bond to give Fe2Ru(CO)9(μ3-Te)2. On treatment of the mixed-metal cluster with NaOMe and acidification of the solution, Fe2(CO)6(μ2-Te2) is obtained, suggesting that during the formation of Fe2Ru(CO)9(μ3-Te)2 from Fe2(CO)6(μ2-Te2), the Fe-Fe bond is retained intact. Also, Fe2Ru(CO)9(μ3-Te)2 reacts at room temperature with Pt(PPh3)4 to give (CO)6Fe2(μ3-Te)2Pt(PPh3)2. Reflux of a benzene solution of Fe2(CO)9(μ3-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)3(μ3-Te)2 is also obtained at room temperature.

AB - The compounds Fe2(CO)6(μ2-Te2) and Fe3(CO)9(μ3-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)6(μ2-Te2) with Ru(CO)4(C2H4) leads to an immediate and almost quantitative formation of the novel mixed-metal cluster Fe2Ru(CO)9(μ3-Te)2. The formation of this cluster most likely proceeds via the initial formation of an Fe-Ru bond to give Fe2Ru(CO)9(μ3-Te)2. On treatment of the mixed-metal cluster with NaOMe and acidification of the solution, Fe2(CO)6(μ2-Te2) is obtained, suggesting that during the formation of Fe2Ru(CO)9(μ3-Te)2 from Fe2(CO)6(μ2-Te2), the Fe-Fe bond is retained intact. Also, Fe2Ru(CO)9(μ3-Te)2 reacts at room temperature with Pt(PPh3)4 to give (CO)6Fe2(μ3-Te)2Pt(PPh3)2. Reflux of a benzene solution of Fe2(CO)9(μ3-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)3(μ3-Te)2 is also obtained at room temperature.

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