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Interaction of Methylmercury(II) with N-Substituted Pyrazoles. Sigma-Donor Ability of Pyridines, Imidazoles, and Pyrazoles

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Canty, AJ and Lee, CV (1982) Interaction of Methylmercury(II) with N-Substituted Pyrazoles. Sigma-Donor Ability of Pyridines, Imidazoles, and Pyrazoles. Organometallics, 1 (8). pp. 1063-1066. ISSN 0276-7333

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Abstract

N-Substituted pyrazoles (L) form complexes [MeHgL]NO, for which 2J(1H-199Hg) decreases with increasing basicity of L in a very similar manner to that observed for closely related N-substituted imidazole complexes. The relationships differ from that for complexes of pyridines and suggest that for ligands of similar log KH (pKa of LH+ in 50% dioxane-water) the N-substituted imidazoles and pyrazoles are better sigma donors toward MeHg(II) than pyridines. The complexes [MeHgL]NO3 [L = N-(2-pyridyl)pyrazole and bis(N-pyrazoly1)methane] have the ligands chelated to MeHg(II) when in methanol.

Item Type: Article
Journal or Publication Title: Organometallics
Page Range: pp. 1063-1066
ISSN: 0276-7333
Identification Number - DOI: 10.1021/om00068a012
Date Deposited: 15 Jan 2008 00:40
Last Modified: 18 Nov 2014 03:27
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