Accession Number : ADA265524


Title :   Vibrational Overtone Spectroscopy of Cyclic Amines: Pyridine and Related Compounds


Descriptive Note : Technical rept.


Corporate Author : BOWLING GREEN STATE UNIV OH CENTER FOR PHOTOCHEMICAL SCIENCES


Personal Author(s) : Overly, Joyce ; Snavely, Deanne


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a265524.pdf


Report Date : 27 May 1993


Pagination or Media Count : 10


Abstract : The vibrational overtone spectra of gaseous pyridine, 2,6- difluoropyridine, and pyrazole have been recorded using photoacoustic absorption spectroscopy. The pyridine overtone spectrum shows a progression of two peaks at each vibrational level. The widths of the overtone absorptions are compared to the known peak widths in the overtone spectrum of benzene. The spectrum has been analyzed in terms of a local mode model and, taken separately, the two peaks fit well to a Birge-Sponer plot. The v=4 overtone spectrum of 2,6-difluoropyridine is similar to that of pyridine but the peaks are shifted to higher energy. The presence of two peaks in this spectrum refutes a previous assignment of the liquid pyridine overtone spectrum in which the two peaks were attributed to structurally different C-H oscillators in the molecule. The overtone spectrum of pyrazole also shows two peaks.


Descriptors :   *CYCLIC COMPOUNDS , *PYRIDINES , VIBRATION , PYRAZOLES , AMINES , ABSORPTION SPECTRA


Subject Categories : Organic Chemistry
      Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE