Accession Number : AD0699727

Title :   THE ELECTRONIC SPECTRA OF n-ALKANES,

Corporate Author : MONTREAL UNIV (QUEBEC) DEPT OF CHEMISTRY

Personal Author(s) : Lombos,B. A. ; Sauvageau,P. ; Sandorfy,C.

Report Date : 16 FEB 1967

Pagination or Media Count : 16

Abstract : The far ultraviolet absorption spectra of the eight first normal paraffin hydrocarbons were measured down to 1150 angstroms under approximately 0.2 A resolution. Methane has a diffuse but not entirely structureless band system with a maximum at 1277 A. The other seven molecules all seem to have a weak band near 1625-1575 A. Towards shorter wavelengths strong bands follow. The first strong band system of ethane exhibits a relatively well-resolved vibrational fine structure. The first and second strong bands (and probably the following ones) show a systematic shift toward longer wavelengths and a corresponding increase in intensity. An attempt is made to interpret the spectra in terms of Mulliken's united atom treatment of the excited configurations of methane and ethane and of the Pariser- and Parr-type calculations of Katagiri and Sandorfy. (Author)

Descriptors :   (*ALKANES, *ULTRAVIOLET SPECTRA), MOLECULAR ENERGY LEVELS, ELECTRON TRANSITIONS, METHANE, DEUTERIUM COMPOUNDS, PROPANE, BUTANES, HYDROCARBONS, CANADA, (U)CANADA

Subject Categories : Organic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE