Synthesis of a tri(gold)boride complex (Cy3P)B[AuP(o-Tol) 3]3

Hubert Schmidbaur; M. Annette Blumenthal; Florian Kraus

doi:10.5560/ZNB.2013-3202

Synthesis of a tri(gold)boride complex (Cy₃P)B[AuP(o-Tol) ₃]₃

Hubert Schmidbaur, M. Annette Blumenthal, Florian Kraus

Department of Chemistry

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

Abstract

A tri(gold)boride of the formula B[AuP(o-Tol)₃]₃ (2) is generated in the reaction of the silylated phosphine borane Cy ₃PBH₂SiMe₃ with the tri(gold)oxonium tetrafluoroborate [(o-Tol)₃PAu]₃O⁺ BF ₄^- and isolated as its stable 1: 1 complex with tricyclohexylphosphine: Cy₃PB[AuP(o-Tol)₃]₃. The composition of the product has been confirmed by elemental analyses and mass spectrometry. Solution NMR data of 2 indicate a molecular structure with C _3v symmetry which has been confirmed by MP2 calculations for the model system H₃PB(AuPH₃)₃. The compound is a rare case of a trimetallated boride which is isolobal with the simple phosphineborane Cy₃PBH₃. With reagents bearing less bulky substituents (R₃ = ⁱPr₃, MePh₂, Ph₃), the reactions proceed to salts with the tetra-aurated cations [Cy₃PB(AuPR₃)₄]⁺.

Original language	English
Pages (from-to)	1321-1326
Number of pages	6
Journal	Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Volume	68
Issue number	12
DOIs	https://doi.org/10.5560/ZNB.2013-3202
State	Published - Dec 2013

Keywords

Boride
Boron Coordination
Gold
Phosphine Borane

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title = "Synthesis of a tri(gold)boride complex (Cy3P)B[AuP(o-Tol) 3]3",

abstract = "A tri(gold)boride of the formula B[AuP(o-Tol)3]3 (2) is generated in the reaction of the silylated phosphine borane Cy 3PBH2SiMe3 with the tri(gold)oxonium tetrafluoroborate [(o-Tol)3PAu]3O+ BF 4- and isolated as its stable 1: 1 complex with tricyclohexylphosphine: Cy3PB[AuP(o-Tol)3]3. The composition of the product has been confirmed by elemental analyses and mass spectrometry. Solution NMR data of 2 indicate a molecular structure with C 3v symmetry which has been confirmed by MP2 calculations for the model system H3PB(AuPH3)3. The compound is a rare case of a trimetallated boride which is isolobal with the simple phosphineborane Cy3PBH3. With reagents bearing less bulky substituents (R3 = iPr3, MePh2, Ph3), the reactions proceed to salts with the tetra-aurated cations [Cy3PB(AuPR3)4]+.",

keywords = "Boride, Boron Coordination, Gold, Phosphine Borane",

author = "Hubert Schmidbaur and Blumenthal, {M. Annette} and Florian Kraus",

year = "2013",

month = dec,

doi = "10.5560/ZNB.2013-3202",

language = "English",

volume = "68",

pages = "1321--1326",

journal = "Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences",

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T1 - Synthesis of a tri(gold)boride complex (Cy3P)B[AuP(o-Tol) 3]3

AU - Schmidbaur, Hubert

AU - Blumenthal, M. Annette

AU - Kraus, Florian

PY - 2013/12

Y1 - 2013/12

N2 - A tri(gold)boride of the formula B[AuP(o-Tol)3]3 (2) is generated in the reaction of the silylated phosphine borane Cy 3PBH2SiMe3 with the tri(gold)oxonium tetrafluoroborate [(o-Tol)3PAu]3O+ BF 4- and isolated as its stable 1: 1 complex with tricyclohexylphosphine: Cy3PB[AuP(o-Tol)3]3. The composition of the product has been confirmed by elemental analyses and mass spectrometry. Solution NMR data of 2 indicate a molecular structure with C 3v symmetry which has been confirmed by MP2 calculations for the model system H3PB(AuPH3)3. The compound is a rare case of a trimetallated boride which is isolobal with the simple phosphineborane Cy3PBH3. With reagents bearing less bulky substituents (R3 = iPr3, MePh2, Ph3), the reactions proceed to salts with the tetra-aurated cations [Cy3PB(AuPR3)4]+.

AB - A tri(gold)boride of the formula B[AuP(o-Tol)3]3 (2) is generated in the reaction of the silylated phosphine borane Cy 3PBH2SiMe3 with the tri(gold)oxonium tetrafluoroborate [(o-Tol)3PAu]3O+ BF 4- and isolated as its stable 1: 1 complex with tricyclohexylphosphine: Cy3PB[AuP(o-Tol)3]3. The composition of the product has been confirmed by elemental analyses and mass spectrometry. Solution NMR data of 2 indicate a molecular structure with C 3v symmetry which has been confirmed by MP2 calculations for the model system H3PB(AuPH3)3. The compound is a rare case of a trimetallated boride which is isolobal with the simple phosphineborane Cy3PBH3. With reagents bearing less bulky substituents (R3 = iPr3, MePh2, Ph3), the reactions proceed to salts with the tetra-aurated cations [Cy3PB(AuPR3)4]+.

KW - Boride

KW - Boron Coordination

KW - Gold

KW - Phosphine Borane

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DO - 10.5560/ZNB.2013-3202

M3 - Article

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SP - 1321

EP - 1326

JO - Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences

JF - Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences

IS - 12

ER -

Synthesis of a tri(gold)boride complex (Cy₃P)B[AuP(o-Tol) ₃]₃

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Keywords

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