Date of Award
5-1974
Degree Type
Thesis
Degree Name
Doctor of Philosophy (PhD)
Department
Chemistry
Supervisor
Dr. G. W. King
Abstract
The vibrational spectra of the three isomeric diethynylbenzenes (ortho, meta and para) are analyzed and the fundamental frequencies are assigned.
Three electronic absorption systems are observed for each diethynylbenzene. The observed positions and intensities of these three transitions agree closely with the results of CNDO calculations. The transitions show large red shift with respect to the analogous absorptions in benzene.
Rotational band contour analysis confirms the occurrence of two types of bands, single and double headed, in the lowest-energy transition of the diethynylbenzenes.
It is argued that, at present, nothing definitive can be said about the geometry of the aromatic ring in the ground and first excited electronic state of derivatives of benzene.
Recommended Citation
Putten, Antoon A.G. Van, "The Spectra of the Diethynylbenzenes" (1974). Open Access Dissertations and Theses. Paper 950.
http://digitalcommons.mcmaster.ca/opendissertations/950