Conformational studies of ethylene glycol and its two methyl ether derivatives: II. A nuclear magnetic resonance study of 2-methoxyethanol and 1,2-dimethoxyethane

The bromination, debromination and debromosilylation of silylstyrenes and other vinylsilanes

The noncumulative effect of methyl substituents on the rate of addition of benzeneselenenyl chloride to olefins

The distribution of neutral lipids and phospholipids in Hymenolepis microstoma has been studied using Fettrot, Sudan Black B, Sudan IV and copper phthalocyanin staining techniques.

Qualitative distribution of neutral lipids and phospholipids in Hymenolepis microstoma from the cysticercoid to the egg producing adult

This review covers the published literature from July 1983 to August 1985 although some citations of other work are also included. As noted in earlier reviews it is impossible to summarize 2 years of NMR literature in so short a space. However, it is hoped that the books, reviews, and various citations will be a useful guide to the reader. The publication Spectroscopy (PO Box 50, Springfield, OR 97477; H. W. Lafferty, Ed.) has recently commenced and promises to be of interest and utility in various areas of spectroscopy, including NMR. Noninvasive Medical Imaging, an international journal published by Verlag Chemie GmbH (Federal Republic of Germany) and Reviews of Magnetic Resonance in Medicine published by Pergamon Press cover specialized application of NMR. The American Chemical Society has introduced an audiocassette course on Fourier Transform NMR Spectroscopy. An extensive C13 NMR Data Base has been made available by Science Information Services, Inc., Larchmont, NY, and City Software, Milwaukee, WI has introduced The NMR Simulator for the IBM PC. 342 references, 2 tables.

Nuclear magnetic resonance spectrometry

The n.m.r. spectra of 11 tetra-substituted ethanes have been obtained in a number of solvents. Changes in the vicinal coupling constants of 1-phenyl-1,2,2-trihaloethanes with solvent do not fit the electrostatic model for solvent effects. It is concluded that the theory breaks down because solute–solvent hydrogen bonding specifically favors the trans rotamers of these compounds. The conditions under which the theory would be expected to break down are also discussed in more general terms.

W. F. Reynolds

Papers

Effect of Solvent Upon the Vicinal Proton Coupling Constants of Complex Substituted Ethanes. II. Anomalous Results for 1-Phenyl-1,2,2-trihaloethanes