R. Hittich
Apr 1, 1982
Citations
0
Influential Citations
8
Citations
Journal
Magnetic Resonance in Chemistry
Abstract
The 300 MHz 1H NMR spectra of 1-chloro- and 1-methylcyclobutane and all monomethylated homologues are reported and analysed with regard to the ring conformations. The results indicate that halogen substituents in methylated halocyclobutanes have a greater preference for the pseudo equatorial position than do methyl groups. The 13C NMR spectral data are given, and substituent parameters for halogen substituents and methyl groups are calculated. Of note are the variable γ effects, especially the remarkable difference between the γ-methyl effects of the stereo-isomeric 1,3-substituted cyclobutane compounds.