Stopped-Flow Studies of the Oxidation of Organic Substrates by Cerium(IV), Thallium(III) and Vanadiu (V)

Amjad, Zahid (1975) Stopped-Flow Studies of the Oxidation of Organic Substrates by Cerium(IV), Thallium(III) and Vanadiu (V). PhD thesis, University of Glasgow.

Full text available as:
[img]
Preview
PDF
Download (7MB) | Preview

Abstract

The Cerium(lV) ion has been shown to exist in perchloric acid solution as a mixture of Ce4+ and CeOH3+ The hydrolysis constant has been determined spectrophotometrically and compared with the existing data on tetravalent ions. From a spectrophotometric study, values of the molar extinction coefficients of each ion have been determined over a wavelength range of 300-400 nm. Two different types of apparatus utilizing the stopped-flow technique have been used to study the following reactions: a) the cerium(lV) oxidation of alpha-hydroxy acids, malonic acid, L-cysteine and DL-penicillamine b) the reaction of thiomalic acid with thalliuim(III) and c) the vanadium(v) oxidation of thiourea. Ceriuro(lV) has been shown to oxidise alpha-hydroxy acids (HI) in perchlorate media via well defined intermediate complexes. The ultraviolet spectra and the equilibrium constants of these complexes have been determined and a comparison made with the kinetically derived values and compared with other oxygen containing substrates. The rates of decomposition of the intermediate complex, CeL3+, have been evaluated over a range of acidities (0.25-1.50M) and temperatures (6.8-30

Item Type: Thesis (PhD)
Qualification Level: Doctoral
Keywords: Physical chemistry, Organic chemistry
Date of Award: 1975
Depositing User: Enlighten Team
Unique ID: glathesis:1975-78706
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 30 Jan 2020 15:00
Last Modified: 30 Jan 2020 15:00
URI: http://theses.gla.ac.uk/id/eprint/78706

Actions (login required)

View Item View Item