1H and 199Hg NMR spectra of methylmercury(II) complexes. Effects of basicity and ortho substitution in pyridines(L) in complexes [MeHgL]NO3

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Title 1H and 199Hg NMR spectra of methylmercury(II) complexes. Effects of basicity and ortho substitution in pyridines(L) in complexes [MeHgL]NO3
Author Canty, Allan J.; Barron, Peter; Healy, Peter Conrad
Journal Name Journal of Organometallic Chemistry
Year Published 1979
Place of publication The Netherlands
Publisher Elsevier Sequoia S.A.
Abstract Linear complexes [MeHgL]NO3 (L = substituted pyridine) have been prepared and their 1H and 199Hg NMR spectra measured and compared with other complexes of this series reported previously. The coupling constant J(1H−199Hg) correlates directly with pKa and with the gas phase enthalpy of ionization [ΔGi(g)] of LH+; with J(1H−199Hg) decreasing with increasing pKa or ΔGi(g). The chemical shift, δ, for 199Hg does not correlate with either pKa or ΔGi(g). Complexes without substituents in the 2 position of pyridine have δ199Hg ca. 80–100 ppm downfield from MeHgNO3, those with one methyl group in the 2 position ca. 125–150 ppm, and those with methyl groups in the 2 and 6 position (or benzyl or 3′-methylpyridyl groups in the 2 position) ca. 160–200 ppm downfield from MeHgNO3. The coupling constant J(1H−199Hg) is found to be more useful than δ199Hg in determination of solution structures of MeHg(II) complexes of this type of ligand.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.sciencedirect.com/science/journal/0022328X
Alternative URI http://dx.doi.org/10.1016/S0022-328X(00)91861-8
Copyright Statement Copyright 1979 Elsevier. Please refer to the journal's website for access to the definitive, published version.
Volume 179
Page from 447
Page to 458
ISSN 0022-328X
Date Accessioned 2007-12-03
Date Available 2009-08-06T06:08:18Z
Language en_AU
Faculty Faculty of Science
Subject PRE2009-Chemical Spectroscopy
URI http://hdl.handle.net/10072/25045
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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