Full-text Article (Subscribers only)
Full-text article (116 kB)
(subscribers only)

Buy article on-line and get access immediately
Buy article on-line for £11.75
(get immediate access)

Search
Search

Go Back

Eur. J. Mass Spectrom. 1, 229 - 236 (1995)

Unimolecular dissociation of tetramethylsilane radical cation: apparent absence of an ion/neutral complex intermediate

John E. Parker,* William Beveridge and Chris A.F. Johnson
Department of Chemistry, Heriot-Watt University, Edinburgh EH14 4AS, UK

ABSTRACT:
Quantum chemistry calculations and experimental investigations of the unimolecular dissociation step of the molecular radical cation oftetramethylsilane losing a methyl radical to give them/z 73 trimethyl silyl cation have been carried out. There is an apparent lack of an ion/neutral complex in the minimum energy reaction pathway, where in quaternary carbon compounds there is evidence of such complexes. It is suggested that at interfragment separation distances at which an ion/neutral complex would be expected the electrostatic interactions are swamped by the strength of the conventional covalent bonding interactions which are an order of magnitude greater than in the quaternary carbon systems at similar separations.

Keywords:

You can now buy this paper on-line in PDF format; it costs only £11.75. Just click on the BUY on-line button. You can pay on-line through a secure server and get access immediately.


© IM Publications
Any problems? E-mail .