EFFECT OF SOLVENTS ON ANION STRUCTURE

The nmr and electronic spectra of salts of 1-nitroindene and 9-nitrofluorene show significant changes between hydroxylic and nonhydroxylic solvents. These changes demonstrate that hydrogen bonding to the oxygens of the anions tends to localize the charge on the oxygens, and thereby causes alterations in the structure of the anions. Cation coordination to the oxygens in nonpolar aprotic solvents produces similar effects, but of smaller magnitude. Analogous effects are observed for some phenoxide salts. © 1969, American Chemical Society. All rights reserved.