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Metal vapour synthesis and conformational analysis of bis(2-trimethylsilyl-3-methyl-phosphobenzene

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posted on 2023-06-07, 23:55 authored by Geoff Cloke, D Charmichael, A R Dias, A M Galvão, Ferreira da Silva, J L
Reaction between chromium and 2-trimethyl-silyl-3-methylphosphobenzene {C5PH3[Si (CH3)3](CH3)} vapours using metal vapour synthesis techniques produces an extremely air-sensitive yellow oil at room temperature; after sublimation and characterization by mass spectrometry and 1H and 31P NMR spectroscopy this oil proves to be a mixture of two isomers, which various techniques failed to separate. With the impossibility of obtaining crystal structures, we have used evidence from the NMR data that one of the isomers shows a long-distance P-P interaction, and extended Huckel calculations, to access the conformations of the two isomers. The calculations show that absolute minima occur for stereochemical reasons when both trimethylsilyl groups are pointing in opposite directions.

History

Publication status

  • Published

ISSN

02682605

Issue

10

Volume

14

Page range

561-564

Presentation Type

  • paper

Event name

Published in: Applied Organometallic Chemistry

Event type

conference

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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