Tellurium as a bridging ligand in cluster synthesis

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

doi:10.1007/BF02841951

Tellurium as a bridging ligand in cluster synthesis

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

Department of Chemistry, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	395-402
Number of pages	8
Journal	Proceedings of the Indian Academy of Sciences - Chemical Sciences
Volume	102
Issue number	3
DOIs	https://doi.org/10.1007/BF02841951
Publication status	Published - 01-06-1990

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Chemistry(all)

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10.1007/BF02841951

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@article{27157ab95c9a41f2909d111cc11ca5bb,

title = "Tellurium as a bridging ligand in cluster synthesis",

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.",

author = "Pradeep Mathur and Mavunkal, {Ipe J.} and Thimmappa, {B. H.S.} and V. Rugmini and Shastri, {B. B.S.}",

year = "1990",

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doi = "10.1007/BF02841951",

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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.

PY - 1990/6/1

Y1 - 1990/6/1

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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Tellurium as a bridging ligand in cluster synthesis

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