UNSPECIFIED (1993) THE ROLE OF INTERMEDIATE OXIDATION-STATES OF TECHNETIUM IN CATALYSIS OF THE OXIDATION OF HYDRAZINE BY OXO-ANIONS .1. NITRATE IONS. JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS (17). pp. 2601-2605. ISSN 0300-9246

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Abstract

The catalysis by technetium of the oxidation of hydrazine by nitric acid has been studied over a wide range of concentrations of hydrazine and nitric acid and also in media where HNO3 is replaced by HBF4. The reaction is confirmed as a chain process, exhibiting a higher turnover number of hydrazine molecules per atom of Tc and a kinetic profile consisting of an initial slow stage, a very fast stage and a termination stage characterised by a high residual concentration of unreacted hydrazine and the existence of all Tc in the form of the initial pertechnetate ion. A model of the reaction which is an elaboration of that devised earlier by Garraway and Wilson, reproduces the main characteristics of reaction over a much wider range of reactants than before. The strong effects of increasing the acid concentration are in the opposite direction for HNO3 and HBF4.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry
Journal or Publication Title:	JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
Publisher:	ROYAL SOC CHEMISTRY
ISSN:	0300-9246
Date:	7 September 1993
Number:	17
Number of Pages:	5
Page Range:	pp. 2601-2605
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/21105

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