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Allan W. Timms
Researcher at Great Lakes Institute of Management
Publications - 20
Citations - 290
Allan W. Timms is an academic researcher from Great Lakes Institute of Management. The author has contributed to research in topics: Sandmeyer reaction & Aryl. The author has an hindex of 9, co-authored 20 publications receiving 282 citations. Previous affiliations of Allan W. Timms include University of York.
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Sandmeyer reactions. Part 7. An investigation into the reduction steps of Sandmeyer hydroxylation and chlorination reactions
TL;DR: In this paper, correlation analyses of the effects of diazonium ion substitution on the rates of reduction were performed for simple hydroxylation and chlorination in aqueous solution.
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Photochemistry and photocuring activity of novel 1-halogeno-4-propoxythioxanthones
Norman S. Allen,Deborah Mallon,Allan W. Timms,W.A. Green,Fernando Catalina,Teresa Corrales,Suppiah Navaratnam,Barry J. Parsons +7 more
TL;DR: The photochemical and photopolymerisation properties of 1-fluoro-4-propoxythioxanthone (FPTX), 1-chloro-4propoxyntioxanthones (CPTX) and BPTX have been determined and compared with the corresponding activity of ITX as discussed by the authors, where the latter two initiators exhibit rates of intersystem crossing which are almost comparable with that of benzophenone.
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Sandmeyer reactions. Part 6. A mechanistic investigation into the reduction and ligand transfer steps of Sandmeyer cyanation
TL;DR: For Sandmeyer cyanation at 298 K in 50% v/v aqueous acetonitrile buffered at pH 8, absolute rate constants have been obtained for the reduction of 4-methoxybenzenediazonium tetrafluoroborate by the cyanocuprate(I) anions CuI(CN)43−, CuII(NCMe)(CN)32− and CuI[NCMe)2(CN]2− as (0.50 ± 0.05), (0,12 ± 0,03
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Sandmeyer reactions. Part 5. Estimation of the rates of 1,5-aryl/aryl radical translocation and cyclisation during Pschorr fluorenone synthesis with a comparative analysis of reaction energetics
TL;DR: In this paper, the Pschorr cyclisation of 2-aroylphenyl radicals has been studied and the results show that the radical translocation occurs with a statistically corrected effective molarity of 2.2.
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Sandmeyer reactions. Part 1. A comparative study of the transfer of halide and water ligands from complexes of CuII to aryl radicals
TL;DR: The rate data indicate that aryl radicals exhibit nucleophilic character during these ligand transfers and that, in the competition between chlorination and hydroxylation, the reactivity–selectivity principle is not obeyed.