Ruthenium complexes with the stanna-closo-dodecaborate ligand: Coexistence of η1 (Sn) and η3(B-H) coordination

Torben Gädt; Beatrice Grau; Klaus Eichele; Ingo Pantenburg; Lars Wesemann

doi:10.1002/chem.200500761

Ruthenium complexes with the stanna-closo-dodecaborate ligand: Coexistence of η¹ (Sn) and η³(B-H) coordination

Torben Gädt, Beatrice Grau, Klaus Eichele, Ingo Pantenburg, Lars Wesemann

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

29 Scopus citations

Abstract

Four stanna-closo-dodecaborate complexes of ruthenium have been prepared and characterized by multinuclear NMR studies in solution and in the solid state. The solid-state structures of the dimeric zwitterions [{Ru(dppb)(SnB ₁₁H₁₁)}₂] (2) (dppb = bis(diphenylphosphino) butane), [{Ru-(PPh₃)₂(SnB₁₁H ₁₁)}₂] (3), and the dianionic ruthenium complex [Bu ₃MeN]₂[Ru(dppb){2,7,8-(μ-H)₃-exo-SnB ₁₁H₁₁} SnB₁₁H₁₁)] (4) were determined by X-ray crystal structure analysis; they establish an unprecedented structural motif in the chemistry of heteroboranes and transition-metal fragments with the stanna-closo-dodecaborate moiety as a two-faced ligand that exhibits η¹(Sn) as well as η³(B-H) coordination. The η³-coordinated stannaborate in 4 and in the isostructural compound [Bu₃MeN]₂[Ru(PPh₃)2{2,7,8-(μ-H) ₃-exo-SnB₁₁H₁₁}(SnB₁₁H ₁₁)] (5) shows fluxional behavior, which was studied in detail by using ³¹P{¹H} EXSY and DNMR experiments. The activation parameters for the dynamic process of 5 are given.

Original language	English
Pages (from-to)	1036-1045
Number of pages	10
Journal	Chemistry - A European Journal
Volume	12
Issue number	4
DOIs	https://doi.org/10.1002/chem.200500761
State	Published - 23 Jan 2006
Externally published	Yes

Keywords

Boron
Cluster compounds
NMR spectroscopy
Ruthenium
Tin

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10.1002/chem.200500761

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title = "Ruthenium complexes with the stanna-closo-dodecaborate ligand: Coexistence of η1 (Sn) and η3(B-H) coordination",

abstract = "Four stanna-closo-dodecaborate complexes of ruthenium have been prepared and characterized by multinuclear NMR studies in solution and in the solid state. The solid-state structures of the dimeric zwitterions [{Ru(dppb)(SnB 11H11)}2] (2) (dppb = bis(diphenylphosphino) butane), [{Ru-(PPh3)2(SnB11H 11)}2] (3), and the dianionic ruthenium complex [Bu 3MeN]2[Ru(dppb){2,7,8-(μ-H)3-exo-SnB 11H11} SnB11H11)] (4) were determined by X-ray crystal structure analysis; they establish an unprecedented structural motif in the chemistry of heteroboranes and transition-metal fragments with the stanna-closo-dodecaborate moiety as a two-faced ligand that exhibits η1(Sn) as well as η3(B-H) coordination. The η3-coordinated stannaborate in 4 and in the isostructural compound [Bu3MeN]2[Ru(PPh3)2{2,7,8-(μ-H) 3-exo-SnB11H11}(SnB11H 11)] (5) shows fluxional behavior, which was studied in detail by using 31P{1H} EXSY and DNMR experiments. The activation parameters for the dynamic process of 5 are given.",

keywords = "Boron, Cluster compounds, NMR spectroscopy, Ruthenium, Tin",

author = "Torben G{\"a}dt and Beatrice Grau and Klaus Eichele and Ingo Pantenburg and Lars Wesemann",

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doi = "10.1002/chem.200500761",

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T1 - Ruthenium complexes with the stanna-closo-dodecaborate ligand

T2 - Coexistence of η1 (Sn) and η3(B-H) coordination

AU - Gädt, Torben

AU - Grau, Beatrice

AU - Eichele, Klaus

AU - Pantenburg, Ingo

AU - Wesemann, Lars

PY - 2006/1/23

Y1 - 2006/1/23

N2 - Four stanna-closo-dodecaborate complexes of ruthenium have been prepared and characterized by multinuclear NMR studies in solution and in the solid state. The solid-state structures of the dimeric zwitterions [{Ru(dppb)(SnB 11H11)}2] (2) (dppb = bis(diphenylphosphino) butane), [{Ru-(PPh3)2(SnB11H 11)}2] (3), and the dianionic ruthenium complex [Bu 3MeN]2[Ru(dppb){2,7,8-(μ-H)3-exo-SnB 11H11} SnB11H11)] (4) were determined by X-ray crystal structure analysis; they establish an unprecedented structural motif in the chemistry of heteroboranes and transition-metal fragments with the stanna-closo-dodecaborate moiety as a two-faced ligand that exhibits η1(Sn) as well as η3(B-H) coordination. The η3-coordinated stannaborate in 4 and in the isostructural compound [Bu3MeN]2[Ru(PPh3)2{2,7,8-(μ-H) 3-exo-SnB11H11}(SnB11H 11)] (5) shows fluxional behavior, which was studied in detail by using 31P{1H} EXSY and DNMR experiments. The activation parameters for the dynamic process of 5 are given.

AB - Four stanna-closo-dodecaborate complexes of ruthenium have been prepared and characterized by multinuclear NMR studies in solution and in the solid state. The solid-state structures of the dimeric zwitterions [{Ru(dppb)(SnB 11H11)}2] (2) (dppb = bis(diphenylphosphino) butane), [{Ru-(PPh3)2(SnB11H 11)}2] (3), and the dianionic ruthenium complex [Bu 3MeN]2[Ru(dppb){2,7,8-(μ-H)3-exo-SnB 11H11} SnB11H11)] (4) were determined by X-ray crystal structure analysis; they establish an unprecedented structural motif in the chemistry of heteroboranes and transition-metal fragments with the stanna-closo-dodecaborate moiety as a two-faced ligand that exhibits η1(Sn) as well as η3(B-H) coordination. The η3-coordinated stannaborate in 4 and in the isostructural compound [Bu3MeN]2[Ru(PPh3)2{2,7,8-(μ-H) 3-exo-SnB11H11}(SnB11H 11)] (5) shows fluxional behavior, which was studied in detail by using 31P{1H} EXSY and DNMR experiments. The activation parameters for the dynamic process of 5 are given.

KW - Boron

KW - Cluster compounds

KW - NMR spectroscopy

KW - Ruthenium

KW - Tin

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JO - Chemistry - A European Journal

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IS - 4

ER -

Ruthenium complexes with the stanna-closo-dodecaborate ligand: Coexistence of η¹ (Sn) and η³(B-H) coordination

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Keywords

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