Ultraviolet photoelectron spectroscopic investigation of electronic structure of some organic thio- and isothio-cyanates and their selenium analogues
- 1 January 1979
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 75, 105-112
- https://doi.org/10.1039/f29797500105
Abstract
He(I) photoelectron spectra of CH3SCN and CH3SeCN exhibit a series of five ionization bands < 15 eV, the first four being assigned to a sequence of n, π and σ orbitals of the S(Se)CN group on the grounds both of empirical correlations with simpler molecules, and of semi-empirical and ab initio quantum mechanical calculations. Theoretical calculations are reported and discussed also for the isomeric CH3NCS molecule, already reported in the literature, but re-examined here for comparison. In phenyl-substituted thio- and isothio-cyanates and their selenium analogues, photoelectron spectra are dominated by the presence of strong benzenoid bands, yet some general trends related to structural effects can be recognized.Keywords
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