Equilibria in complexes of N-heterocyclic molecules. Part 29. An electron spin resonance study of some N-heterocyclic complex ions of silver(II)

Evans, Jeffrey C., Gillard, R. D., Lancashire, Robert J. and Morgan, Peter Huw ORCID: https://orcid.org/0000-0002-8555-3493 1980. Equilibria in complexes of N-heterocyclic molecules. Part 29. An electron spin resonance study of some N-heterocyclic complex ions of silver(II). Journal of the Chemical Society. Dalton Transactions (8) , pp. 1277-1281. 10.1039/dt9800001277

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Abstract

A critical assessment of the e.s.r. parameters for complex compounds of the silver(II) ion with the N-heterocyclic donors pyridine, 2,2′-bipyridyl, and 1,10-phenanthroline is presented. In previous reports, nitric acid has often been used as an ‘inert’ solvent; this is wrong. Protons and silver(II) ions compete for the ligands, equilibria being fairly rapidly established. Species studied in nitric acid solutions made from solid compounds of silver(II) are usually not those present in the pure solid. Another important difference in the present investigation is in the assignment of the nitrogen superhyperfine coupling constants. It is now well established that A∥N and A⊥N cannot be immediately obtained from the e.s.r. spectra. This paper also introduces the use of a new line-sharpening device, suitable for obtaining extremely well resolved e.s.r. spectra of solids.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Business (Including Economics) Chemistry
Subjects:	Q Science > QD Chemistry
Publisher:	Royal Society of Chemistry
ISSN:	0300-9246
Last Modified:	21 Oct 2022 09:49
URI:	https://orca.cardiff.ac.uk/id/eprint/37837

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