Solvation of the dioxouranium(VI) ion by dimethyl sulfoxide

Journal Article · Thu Jun 01 00:00:00 EDT 1978 · J. Solution Chem.; (United States)

DOI:https://doi.org/10.1007/BF00646114· OSTI ID:6781254

Honan, G J; Lincoln, S F; Williams, E H

The species UO/sub 2/(DMSO)/sup 2 +//sub 5/ is shown from /sup 1/H NMR studies to be the predominant dioxouranium (VI) species existing in dilute anhydrous acetonedimethyl sulfoxide (DMSO) solutions, and this result is compared with data reported for the analogous water-acetone-dimethyl sulfoxide system. Complete line-shape analyses of exchange-modified /sup 1/H NMR line shapes indicate that the mechanism for DMSO exchange on UO/sub 2/(DMSO)/sup 2 +//sub 5/ is probably of the D or I/sub D/ type. A typical set of rate parameters are K/sub ex/(260/sup 0/K)/sub 0/ = 273 +- 14 sec/sup -1/, ..delta..H = 38.9 +- 0.5 kJ-mole/sup -1/, and ..delta..S = -47.5 +- 1.8 J-/sup 0/K/sup -1/-mole/sup -1/ for a solution in which (UO/sub 2/(DMSO)/sup 2 +//sub 5/), (DMSO), and (d/sub 6/ acetone) are, respectively, 0.0155, 0.0875, and 13.00 moles-dm/sup -3/.

• Research Organization: Univ. of Adelaide
• OSTI ID: 6781254
• Journal Information: J. Solution Chem.; (United States), Vol. 7:6
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
URANYL COMPOUNDS
SOLVATION
ACETONE
AQUEOUS SOLUTIONS
COMPARATIVE EVALUATIONS
DMSO
EQUILIBRIUM
NUCLEAR MAGNETIC RESONANCE
REACTION KINETICS
SOLUTIONS
ACTINIDE COMPOUNDS
DISPERSIONS
KETONES
KINETICS
MAGNETIC RESONANCE
MIXTURES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
RESONANCE
SULFOXIDES
URANIUM COMPOUNDS
400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials