Collect. Czech. Chem. Commun. 1994, 59, 1349-1355

Acceptor Numbers for Binary Mixtures of Dipolar Aprotic Solvents with Methanol

Malgorzata Podsiadla, Jadwiga Rzeszotarska and Marek K. Kalinowski

Department of Chemistry, University of Warsaw, 02-093 Warsaw, Poland


Using bis(cyano)bis(9,10-phenanthroline)iron(II) as solvatochromic indicator, the acceptor numbers, AN, were determined for binary mixtures of benzene, benzonitrile, acetonitrile, acetone, N,N-dimethylformamide, dimethyl sulfoxide and hexamethylphosphoric triamide with methanol. Deviations from linearity of the plots of AN values against the molar fraction of the components were interpreted both in terms of changes in solvent liquid structure and in cathegories of preferential solvation.