Accession Number : AD0608243

Title :   NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY. STUDIES OF 1, 1, 4, 4-TETRAFLUORO-1, 3-ALKADIENES.

Descriptive Note : Technical rept. no. 34,

Corporate Author : CALIFORNIA INST OF TECH PASADENA GATES AND CRELLIN LABS OF CHEMISTRY

Personal Author(s) : Servis,Kenneth L. ; Roberts,John D.

Report Date : SEP 1964

Pagination or Media Count : 34

Abstract : 1, 1, 4, 4-Tetrafluoro-1, 3-butadiene is indicated by dipole-moment studies to exist in the s-trans conformation. The F19-F19 spin-spin couplings constants for this compound are surprisingly similar to those of bis-4, 5(difluoromethylene)-cyclohexene and perfluoro-1, 2dimethylenecyclobutane both of which substances have their double bonds held in s-cis configurations. The results are related to the mechanism of transmission of fluorinefluorine spin-spin interactions and are inconsistent with a predominance of a 'through-space' mechansism of coupling. (Author)

Descriptors :   (*NUCLEAR MAGNETIC RESONANCE, HALOGENATED HYDROCARBONS), (*HALOGENATED HYDROCARBONS, NUCLEAR MAGNETIC RESONANCE), (*FLUORINE COMPOUNDS, NUCLEAR MAGNETIC RESONANCE), DIPOLE MOMENTS, MOLECULAR ISOMERISM, NUCLEAR SPINS, CHEMICAL BONDS, ATOMIC ORBITALS, CYCLOBUTANES, CYCLOHEXENES, SPECTROSCOPY

Distribution Statement : APPROVED FOR PUBLIC RELEASE