Platination of [3-X-7,8-Ph2-7,8-nido-C2 B9H8]2- (X=Et, F)Synthesis and characterisation of slipped and 1,2→1,7 isomerised products

Susan Robertson, David Ellis, Georgina M. Rosair, Alan J. Welch

Research output: Contribution to journalArticle

Abstract

The reaction of the labelled carborane ligand [3-Et-7, 8-Ph2-7,8- nido -C2B9H8] 2- with a source of {Pt(PMe2Ph)2} 2+ affords non-isomerised 1,2-Ph2-3, 3-(PMe2Ph) 2-6-Et-3,1,2-closo-PtC2 B9H8 (1). The analogous reaction between [3-F-7, 8-Ph2-7,8- nido -C2B9H8] 2- and {Pt(PMe2Ph)2}2+ yields 1,8-Ph2-2,2-(PMe2Ph)2-4-F-2,1, 8- closo -PtC2B9H8 (3). Compound 1 has a heavily slipped structure (? 0.72 Å), which to some degree obviates the need for C atom isomerisation. However, that it is a kinetic product of the reaction is evident from the fact that it reverts to isomerised 1,8-Ph2-2,2-(PMe2Ph) 2-4-Et-2,1,8-closo-PtC2B9H8 (2) slowly at room temperature but more rapidly with gentle warming. The heteroatom and labelled-B atom positions in the isomerised compounds 2 and 3 may be explained most simply by the rotation of a CB2 face of an intermediate based on the structure of 1. Compounds 1-3 were characterised by a combination of spectroscopic and crystallographic techniques. © 2003 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)286-293
Number of pages8
JournalJournal of Organometallic Chemistry
Volume680
Issue number1-2
DOIs
Publication statusPublished - 29 Aug 2003

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Atoms
Isomerization
Ligands
Kinetics
Temperature

Keywords

  • Carborane
  • Crystallographic study
  • Isomerisation
  • Metallacarborane
  • Spectroscopy
  • Synthesis
  • Vertex labelling

Cite this

@article{1007f77b2a904b4f928af7a4a6d17d90,
title = "Platination of [3-X-7,8-Ph2-7,8-nido-C2 B9H8]2- (X=Et, F)Synthesis and characterisation of slipped and 1,2→1,7 isomerised products",
abstract = "The reaction of the labelled carborane ligand [3-Et-7, 8-Ph2-7,8- nido -C2B9H8] 2- with a source of {Pt(PMe2Ph)2} 2+ affords non-isomerised 1,2-Ph2-3, 3-(PMe2Ph) 2-6-Et-3,1,2-closo-PtC2 B9H8 (1). The analogous reaction between [3-F-7, 8-Ph2-7,8- nido -C2B9H8] 2- and {Pt(PMe2Ph)2}2+ yields 1,8-Ph2-2,2-(PMe2Ph)2-4-F-2,1, 8- closo -PtC2B9H8 (3). Compound 1 has a heavily slipped structure (? 0.72 {\AA}), which to some degree obviates the need for C atom isomerisation. However, that it is a kinetic product of the reaction is evident from the fact that it reverts to isomerised 1,8-Ph2-2,2-(PMe2Ph) 2-4-Et-2,1,8-closo-PtC2B9H8 (2) slowly at room temperature but more rapidly with gentle warming. The heteroatom and labelled-B atom positions in the isomerised compounds 2 and 3 may be explained most simply by the rotation of a CB2 face of an intermediate based on the structure of 1. Compounds 1-3 were characterised by a combination of spectroscopic and crystallographic techniques. {\circledC} 2003 Elsevier Science B.V. All rights reserved.",
keywords = "Carborane, Crystallographic study, Isomerisation, Metallacarborane, Spectroscopy, Synthesis, Vertex labelling",
author = "Susan Robertson and David Ellis and Rosair, {Georgina M.} and Welch, {Alan J.}",
year = "2003",
month = "8",
day = "29",
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pages = "286--293",
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publisher = "Elsevier",
number = "1-2",

}

Platination of [3-X-7,8-Ph2-7,8-nido-C2 B9H8]2- (X=Et, F)Synthesis and characterisation of slipped and 1,2→1,7 isomerised products. / Robertson, Susan; Ellis, David; Rosair, Georgina M.; Welch, Alan J.

In: Journal of Organometallic Chemistry, Vol. 680, No. 1-2, 29.08.2003, p. 286-293.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Platination of [3-X-7,8-Ph2-7,8-nido-C2 B9H8]2- (X=Et, F)Synthesis and characterisation of slipped and 1,2→1,7 isomerised products

AU - Robertson, Susan

AU - Ellis, David

AU - Rosair, Georgina M.

AU - Welch, Alan J.

PY - 2003/8/29

Y1 - 2003/8/29

N2 - The reaction of the labelled carborane ligand [3-Et-7, 8-Ph2-7,8- nido -C2B9H8] 2- with a source of {Pt(PMe2Ph)2} 2+ affords non-isomerised 1,2-Ph2-3, 3-(PMe2Ph) 2-6-Et-3,1,2-closo-PtC2 B9H8 (1). The analogous reaction between [3-F-7, 8-Ph2-7,8- nido -C2B9H8] 2- and {Pt(PMe2Ph)2}2+ yields 1,8-Ph2-2,2-(PMe2Ph)2-4-F-2,1, 8- closo -PtC2B9H8 (3). Compound 1 has a heavily slipped structure (? 0.72 Å), which to some degree obviates the need for C atom isomerisation. However, that it is a kinetic product of the reaction is evident from the fact that it reverts to isomerised 1,8-Ph2-2,2-(PMe2Ph) 2-4-Et-2,1,8-closo-PtC2B9H8 (2) slowly at room temperature but more rapidly with gentle warming. The heteroatom and labelled-B atom positions in the isomerised compounds 2 and 3 may be explained most simply by the rotation of a CB2 face of an intermediate based on the structure of 1. Compounds 1-3 were characterised by a combination of spectroscopic and crystallographic techniques. © 2003 Elsevier Science B.V. All rights reserved.

AB - The reaction of the labelled carborane ligand [3-Et-7, 8-Ph2-7,8- nido -C2B9H8] 2- with a source of {Pt(PMe2Ph)2} 2+ affords non-isomerised 1,2-Ph2-3, 3-(PMe2Ph) 2-6-Et-3,1,2-closo-PtC2 B9H8 (1). The analogous reaction between [3-F-7, 8-Ph2-7,8- nido -C2B9H8] 2- and {Pt(PMe2Ph)2}2+ yields 1,8-Ph2-2,2-(PMe2Ph)2-4-F-2,1, 8- closo -PtC2B9H8 (3). Compound 1 has a heavily slipped structure (? 0.72 Å), which to some degree obviates the need for C atom isomerisation. However, that it is a kinetic product of the reaction is evident from the fact that it reverts to isomerised 1,8-Ph2-2,2-(PMe2Ph) 2-4-Et-2,1,8-closo-PtC2B9H8 (2) slowly at room temperature but more rapidly with gentle warming. The heteroatom and labelled-B atom positions in the isomerised compounds 2 and 3 may be explained most simply by the rotation of a CB2 face of an intermediate based on the structure of 1. Compounds 1-3 were characterised by a combination of spectroscopic and crystallographic techniques. © 2003 Elsevier Science B.V. All rights reserved.

KW - Carborane

KW - Crystallographic study

KW - Isomerisation

KW - Metallacarborane

KW - Spectroscopy

KW - Synthesis

KW - Vertex labelling

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DO - 10.1016/S0022-328X(03)00406-6

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SP - 286

EP - 293

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JF - Journal of Organometallic Chemistry

SN - 0022-328X

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