Rotational correlation times and coefficients of viscosity of electrolytic

_1) and the solvent molecular rotational correlation time (r2) is relatively weakly dependent on concentration as assumed earlier. For aqueous solutio...
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DONALD E. O’REILLYAND E. MARKPETERSON

3280

Rotational Correlation Times and Coefficients of Viscosity of Electrolytic Solutions’

by Donald E. O’Reilly and E. Mark Peterson Argonne National Laboratory, Argonne, Illinois 60439 (Received February 27, 1970)

Assumptions implicit in an earlier theory of the viscosity of electrolytic ammonia solutions2are examined experimentally. For NaN03 solutions in liquid NH3 the translational Stokes-Einstein relation is obeyed for the solvent at low concentrations ( 0). Hence from this point of view the terminology referred to above should be modified. I n both cases the salts greatly disrupt the hydrogen bond structure of the solvent water as pointed out previously by Frank and Evansz3and others. (21) D.E. O’Reilly, J. Phgs. Chem., 74, 3277 (1970). (22) 0.Ya. Samoilov, “Structure of Aqueous Electrolyte Solutions and the Hydration of Ions,” translated by D. G. Ives, Consultants Bureau Enterprises, Inc., New York, N.Y.,1965. (23) H.S. Frank and M. W. Evans, J. Chem. Phys., 13, 507 (1945).

Laser Photolysis of Alkali Metal-Amine Solutions by D.Huppert and K. H. Bar-Eli Department of Chemistry, TeGAviv University, Tel-Auiu, Ierael

(Received March 6,1870)

Solutions of sodium in propylenediamine (PDA) and ethylenediamine (EDA) were photolyzed by a giant pulse ruby laser. It was found that (a) the 670-mp species (V species) is 70% bleached immediately after the pulse (time resolution