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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Infrared Spectra and ab initio Calculations for Fluoride-acetylene Clusters: F-(HCCH)n, n= 3–6

Duncan A. Wild A D , Zoë M. Loh B and Evan J. Bieske C
+ Author Affiliations
- Author Affiliations

A School of Biomedical, Biomolecular, and Chemical Sciences, The University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia.

B CSIRO Marine & Atmospheric Research/Centre for Australian Weather and Climate Research, PMB1, Aspendale, Vic. 3195, Australia.

C School of Chemistry, University of Melbourne, Parkville, Vic. 3010, Australia.

D Corresponding author. Email: duncan.wild@uwa.edu.au

Australian Journal of Chemistry 64(5) 633-637 https://doi.org/10.1071/CH11032
Submitted: 18 January 2011  Accepted: 11 February 2011   Published: 30 May 2011

Abstract

Infrared spectra and ab initio calculations are presented for gas phase clusters consisting of a fluoride anion attached to acetylene ligands. Spectra obtained in the C-H stretch region contain a single strong band, consistent with cluster structures in which roughly equivalent acetylene ligands are hydrogen bonded to a central fluoride anion core. Minimum energy structures predicted from ab initio calculations at the MP2 level of theory are highly symmetric with acetylene ligands equally spaced about a central fluoride anion core. The predicted H-bonded C-H stretching frequencies, after scaling to correct for anharmonicity, agree well with the experimental band positions.


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