Accession Number : AD0482859

Title :   INFRARED SPECTRA OF SELECTED ALIPHATIC ACID HALIDES BETWEEN 2000-250 CM TO THE MINUS ONE POWER.

Descriptive Note : Summay technical rept. Sep 64-Jun 65,

Corporate Author : MONSANTO RESEARCH CORP DAYTON OH

Personal Author(s) : Feairheller, William R., Jr. ; Katon, John E.

Report Date : FEB 1966

Pagination or Media Count : 60

Abstract : The infrared spectra of acyl halides possess a number of absorption bands in the low frequency region that are of analytical significance. Certain bending vibrations have been observed to be consistently located in the same position. The greater than expected number of carbon-halogen stretching vibrations is due to the existence of discreet rotational isomers in the liquid state. The only satisfactory explanation for the number of carbon-halogen stretching vibrations is that rotational isomers formed by internal rotation about the alpha and beta carbon-carbon bonds possess different carbon-halogen stretching frequencies. This is the first example of this type of non-bonded interactions over such a great chain distance. An assignment of the carbon-halogen stretching frequencies to the possible rotational isomers is proposed, and the implications of the results concerning the nature of the non-bonded forces are discussed. (Author)

Descriptors :   (*HALIDES, ALIPHATIC COMPOUNDS), (*INFRARED SPECTRA, ABSORPTION SPECTRA), (*SPECTROSCOPY, IDENTIFICATION), LOW FREQUENCY, CHEMICAL ANALYSIS, MOLECULAR ISOMERISM, MOLECULAR ROTATION, CHEMICAL BONDS, CHLORIDES, BROMIDES, FATTY ACIDS, OCTANOIC ACID, ESTERS, PROPIONIC ACID, HALOGENATED HYDROCARBONS, MOLECULAR PROPERTIES.

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE