Steric Effects in
Heteroboranes.  Part 8.  Sterically-Induced Exo-Skeletal Isomerisation of Di-Copper Carbametallaboranes.  Syntheses and Molecular Structures of (Ph3PCu)2Ph2C2B9H9 and {(o-tol)3PCu}2Ph2C2B9H9

Kerry J. Adams; Jill Cowie; Steven G. D. Henderson; Gillian J. McCormick; Alan J. Welch

doi:10.1016/0022-328X(94)85038-0

Steric Effects in Heteroboranes. Part 8. Sterically-Induced Exo-Skeletal Isomerisation of Di-Copper Carbametallaboranes. Syntheses and Molecular Structures of (Ph₃PCu)₂Ph₂C₂B₉H₉ and {(o-tol)₃PCu}₂Ph₂C₂B₉H₉

Kerry J. Adams
, Jill Cowie
, Steven G. D. Henderson
, Gillian J. McCormick
, Alan J. Welch^*

^*Corresponding author for this work

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

14 Citations (Scopus)

Abstract

In (Ph₃PCu)₂Ph₂C₂B₉H₉ (Ia) and {(o-tol)₃PCu}₂Ph₂C₂B₉H₉ (Ic) one copper atom occupies a polyhedral vertex position but is slipped away from the cage carbon atoms (the latter the more so) to relieve phosphine ṫ C_cage-phenyl crowding. The second copper atom is exo-facially bonded to the B(8)B(9)B(12) triangular face, in contrast to the situation in (Ph₃PCu)₂C₂B₉H₁₁, where the exo-metal caps the Cu(3)B(4)B(8) triangle. Compounds Ia, Ic and the related species (Cy₃PCu)₂Ph₂C₂B₉H₉ (Ib) display fluxionality in solution at room temperature that renders equivalent the two phosphorus nuclei. It is speculated that this fluxional process involves a unique bis(eto-metal) nido carbaborane.

Original language	English
Pages (from-to)	C9-C11
Number of pages	3
Journal	Journal of Organometallic Chemistry
Volume	481
Issue number	2
DOIs	https://doi.org/10.1016/0022-328X(94)85038-0
Publication status	Published - 15 Nov 1994

Keywords

Boron
Carborane
Copper
Fluxionality
Metalla-carborane
X-ray diffraction

ASJC Scopus subject areas

Biochemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Materials Chemistry

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Adams, K. J., Cowie, J., Henderson, S. G. D., McCormick, G. J., & Welch, A. J. (1994). Steric Effects in Heteroboranes. Part 8. Sterically-Induced Exo-Skeletal Isomerisation of Di-Copper Carbametallaboranes. Syntheses and Molecular Structures of (Ph₃PCu)₂Ph₂C₂B₉H₉ and {(o-tol)₃PCu}₂Ph₂C₂B₉H₉. Journal of Organometallic Chemistry, 481(2), C9-C11. https://doi.org/10.1016/0022-328X(94)85038-0

@article{c119e77d155d4847a6ed5768a798ade8,

title = "Steric Effects in Heteroboranes. Part 8. Sterically-Induced Exo-Skeletal Isomerisation of Di-Copper Carbametallaboranes. Syntheses and Molecular Structures of (Ph3PCu)2Ph2C2B9H9 and \{(o-tol)3PCu\}2Ph2C2B9H9",

abstract = "In (Ph3PCu)2Ph2C2B9H9 (Ia) and \{(o-tol)3PCu\}2Ph2C2B9H9 (Ic) one copper atom occupies a polyhedral vertex position but is slipped away from the cage carbon atoms (the latter the more so) to relieve phosphine ṫ Ccage-phenyl crowding. The second copper atom is exo-facially bonded to the B(8)B(9)B(12) triangular face, in contrast to the situation in (Ph3PCu)2C2B9H11, where the exo-metal caps the Cu(3)B(4)B(8) triangle. Compounds Ia, Ic and the related species (Cy3PCu)2Ph2C2B9H9 (Ib) display fluxionality in solution at room temperature that renders equivalent the two phosphorus nuclei. It is speculated that this fluxional process involves a unique bis(eto-metal) nido carbaborane.",

keywords = "Boron, Carborane, Copper, Fluxionality, Metalla-carborane, X-ray diffraction",

author = "Adams, \{Kerry J.\} and Jill Cowie and Henderson, \{Steven G. D.\} and McCormick, \{Gillian J.\} and Welch, \{Alan J.\}",

year = "1994",

month = nov,

day = "15",

doi = "10.1016/0022-328X(94)85038-0",

language = "English",

volume = "481",

pages = "C9--C11",

journal = "Journal of Organometallic Chemistry",

issn = "0022-328X",

publisher = "Elsevier B.V.",

number = "2",

}

Adams, KJ, Cowie, J, Henderson, SGD, McCormick, GJ & Welch, AJ 1994, 'Steric Effects in Heteroboranes. Part 8. Sterically-Induced Exo-Skeletal Isomerisation of Di-Copper Carbametallaboranes. Syntheses and Molecular Structures of (Ph₃PCu)₂Ph₂C₂B₉H₉ and {(o-tol)₃PCu}₂Ph₂C₂B₉H₉', Journal of Organometallic Chemistry, vol. 481, no. 2, pp. C9-C11. https://doi.org/10.1016/0022-328X(94)85038-0

Steric Effects in Heteroboranes. Part 8. Sterically-Induced Exo-Skeletal Isomerisation of Di-Copper Carbametallaboranes. Syntheses and Molecular Structures of (Ph₃PCu)₂Ph₂C₂B₉H₉ and {(o-tol)₃PCu}₂Ph₂C₂B₉H₉. / Adams, Kerry J.; Cowie, Jill; Henderson, Steven G. D. et al.
In: Journal of Organometallic Chemistry, Vol. 481, No. 2, 15.11.1994, p. C9-C11.

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

TY - JOUR

T1 - Steric Effects in Heteroboranes. Part 8. Sterically-Induced Exo-Skeletal Isomerisation of Di-Copper Carbametallaboranes. Syntheses and Molecular Structures of (Ph3PCu)2Ph2C2B9H9 and {(o-tol)3PCu}2Ph2C2B9H9

AU - Adams, Kerry J.

AU - Cowie, Jill

AU - Henderson, Steven G. D.

AU - McCormick, Gillian J.

AU - Welch, Alan J.

PY - 1994/11/15

Y1 - 1994/11/15

N2 - In (Ph3PCu)2Ph2C2B9H9 (Ia) and {(o-tol)3PCu}2Ph2C2B9H9 (Ic) one copper atom occupies a polyhedral vertex position but is slipped away from the cage carbon atoms (the latter the more so) to relieve phosphine ṫ Ccage-phenyl crowding. The second copper atom is exo-facially bonded to the B(8)B(9)B(12) triangular face, in contrast to the situation in (Ph3PCu)2C2B9H11, where the exo-metal caps the Cu(3)B(4)B(8) triangle. Compounds Ia, Ic and the related species (Cy3PCu)2Ph2C2B9H9 (Ib) display fluxionality in solution at room temperature that renders equivalent the two phosphorus nuclei. It is speculated that this fluxional process involves a unique bis(eto-metal) nido carbaborane.

AB - In (Ph3PCu)2Ph2C2B9H9 (Ia) and {(o-tol)3PCu}2Ph2C2B9H9 (Ic) one copper atom occupies a polyhedral vertex position but is slipped away from the cage carbon atoms (the latter the more so) to relieve phosphine ṫ Ccage-phenyl crowding. The second copper atom is exo-facially bonded to the B(8)B(9)B(12) triangular face, in contrast to the situation in (Ph3PCu)2C2B9H11, where the exo-metal caps the Cu(3)B(4)B(8) triangle. Compounds Ia, Ic and the related species (Cy3PCu)2Ph2C2B9H9 (Ib) display fluxionality in solution at room temperature that renders equivalent the two phosphorus nuclei. It is speculated that this fluxional process involves a unique bis(eto-metal) nido carbaborane.

KW - Boron

KW - Carborane

KW - Copper

KW - Fluxionality

KW - Metalla-carborane

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/4243583730

U2 - 10.1016/0022-328X(94)85038-0

DO - 10.1016/0022-328X(94)85038-0

M3 - Article

AN - SCOPUS:4243583730

SN - 0022-328X

VL - 481

SP - C9-C11

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

IS - 2

ER -

Steric Effects in Heteroboranes. Part 8. Sterically-Induced Exo-Skeletal Isomerisation of Di-Copper Carbametallaboranes. Syntheses and Molecular Structures of (Ph3PCu)2Ph2C2B9H9 and {(o-tol)3PCu}2Ph2C2B9H9