Complexes of the Proton and Its Hydrates with Carbamoylphosphine Oxide in Wet Dichloroethane Solutions Full article
Journal |
The Journal of Physical Chemistry A
ISSN: 1089-5639 , E-ISSN: 1520-5215 |
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Output data | Year: 2006, Volume: 110, Number: 30, Pages: 9505-9512 Pages count : 8 DOI: 10.1021/jp0609838 | ||||
Tags | Enthalpy; Hydrates; Nuclear magnetic resonance spectroscopy; Radioisotopes; Solvent extraction | ||||
Authors |
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Affiliations |
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Funding (2)
1 | Civilian Research and Development Foundation | RC2-2342-ST-02 |
2 | Dutch Research Council | 047.015.003 |
Abstract:
To better understand the complex equilibria involved in the UNEX process for acidic solvent extraction of radionuclides, the interaction of a carbamoylphosphine oxide ligand (L) with the proton of hydrated chlorinated cobalt(III)dicarbollide acid, H[Co(C2B9H8Cl3)2], has been studied in wet 1,2-dichlorethane (DCE) solution using IR and NMR (13C and 31P) spectroscopy. The formation of two groups of complexes has been determined. The first group contains three complexes with 1:1 composition of acid to ligand (Scheme 1). The second group of complexes has 1:2 composition in the equilibrium, shown in Scheme 2. Within each group, the complexes differ in composition only by the number of incorporated water molecules. The equilibria (Schemes 1 and 2) are both very sensitive to the content of self-associated water in solution and are driven by its concentration, which is unsteady and depends on the solution preparation history. The simultaneous presence of both anhydrous (I, II) and hydrated (III, IIIa, IV) proton solvates indicates that the enthalpies of carbamoylphosphine oxide complex formation with H+, H3O+, and H5O2+ are very close to each other.
Cite:
Stoyanov E.S.
, Smirnov I.V.
, Fedotov M.A.
Complexes of the Proton and Its Hydrates with Carbamoylphosphine Oxide in Wet Dichloroethane Solutions
The Journal of Physical Chemistry A. 2006. V.110. N30. P.9505-9512. DOI: 10.1021/jp0609838 WOS Scopus РИНЦ
Complexes of the Proton and Its Hydrates with Carbamoylphosphine Oxide in Wet Dichloroethane Solutions
The Journal of Physical Chemistry A. 2006. V.110. N30. P.9505-9512. DOI: 10.1021/jp0609838 WOS Scopus РИНЦ
Dates:
Submitted: | Feb 15, 2006 |
Accepted: | Jun 1, 2006 |
Published online: | Jul 13, 2006 |
Published print: | Aug 1, 2006 |
Identifiers:
Web of science | WOS:000239311100027 |
Scopus | 2-s2.0-33748316549 |
Elibrary | 13504855 |
Chemical Abstracts | 2006:675799 |
Chemical Abstracts (print) | 145:335636 |
PMID | 16869702 |
OpenAlex | W2004332807 |