Synthesis of Tetrafluorocyclobutanes by Cycloalkylation
作者:Donald D. Coffman、Paul L. Barrick、Richard D. Cramer、Maynard S. Raasch
DOI:10.1021/ja01170a033
日期:1949.2
Monomeric fluorine compounds containing a four-carbon atom ring
申请人:DU PONT
公开号:US02462345A1
公开(公告)日:1949-02-22
Fluorine Magnetic Resonance Spectra of some Mono‐ and Disubstituted Tetrafluorocyclobutanes
作者:W. D. Phillips
DOI:10.1063/1.1743149
日期:1956.11
The fluorine magnetic resonance spectra of a series of tetrafluorocyclobutane molecules substituted unsymmetrically with respect to the plane of the cyclobutane ring are reported. The complex spectra of these compounds are interpreted in terms of nonequivalence of fluorine atoms bonded to a common ring carbon atom. Nonequivalence of fluorine atoms bonded to a common carbon atom is discussed in terms of restricted rotation about C–C bonds in cyclic structures and possible intramolecular interaction mechanisms for producing the nonequivalence.