Catalysis and inhibition of the uranyl nitrate-tributylphosphate exchange reaction

Benyamin Cohen; Shmuel Weiss; Yair Egozy

doi:10.1016/0022-1902(78)80508-9

Catalysis and inhibition of the uranyl nitrate-tributylphosphate exchange reaction

Benyamin Cohen, Shmuel Weiss, Yair Egozy

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

The exchange reaction UO₂(NO₃)₂·2TBP + TBP^* ⇌ TBP + UO₂(NO₃)₂·2TBP^* was studied in acetonitrile and was found to be catalyzed by water and methanol and to be inhibited by added nitrate. The observations were interpreted in terms of a mechanism composed of two parallel reactions: one which proceeds via a UO₂(NO₃)₂·3TBP activated complex, similar to what happens in low dielectric constant solvents, and one which depends on ionization of uranyl nitrate and a UO₂(NO₃)·3TBP+ activated complex. Rate constants and activation energies and entropies were evaluated.

Original language	English
Pages (from-to)	1059-1062
Number of pages	4
Journal	Journal of Inorganic and Nuclear Chemistry
Volume	40
Issue number	6
DOIs	https://doi.org/10.1016/0022-1902(78)80508-9
State	Published - 1 Jan 1978

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abstract = "The exchange reaction UO2(NO3)2·2TBP + TBP* ⇌ TBP + UO2(NO3)2·2TBP* was studied in acetonitrile and was found to be catalyzed by water and methanol and to be inhibited by added nitrate. The observations were interpreted in terms of a mechanism composed of two parallel reactions: one which proceeds via a UO2(NO3)2·3TBP activated complex, similar to what happens in low dielectric constant solvents, and one which depends on ionization of uranyl nitrate and a UO2(NO3)·3TBP+ activated complex. Rate constants and activation energies and entropies were evaluated.",

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AU - Weiss, Shmuel

AU - Egozy, Yair

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N2 - The exchange reaction UO2(NO3)2·2TBP + TBP* ⇌ TBP + UO2(NO3)2·2TBP* was studied in acetonitrile and was found to be catalyzed by water and methanol and to be inhibited by added nitrate. The observations were interpreted in terms of a mechanism composed of two parallel reactions: one which proceeds via a UO2(NO3)2·3TBP activated complex, similar to what happens in low dielectric constant solvents, and one which depends on ionization of uranyl nitrate and a UO2(NO3)·3TBP+ activated complex. Rate constants and activation energies and entropies were evaluated.

AB - The exchange reaction UO2(NO3)2·2TBP + TBP* ⇌ TBP + UO2(NO3)2·2TBP* was studied in acetonitrile and was found to be catalyzed by water and methanol and to be inhibited by added nitrate. The observations were interpreted in terms of a mechanism composed of two parallel reactions: one which proceeds via a UO2(NO3)2·3TBP activated complex, similar to what happens in low dielectric constant solvents, and one which depends on ionization of uranyl nitrate and a UO2(NO3)·3TBP+ activated complex. Rate constants and activation energies and entropies were evaluated.

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JO - Journal of Inorganic and Nuclear Chemistry

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ER -

Catalysis and inhibition of the uranyl nitrate-tributylphosphate exchange reaction

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