ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The stability constants of the methylmercury complexes CH3HgL1-λ with a considerable number of ligands Lλ- have been determined (Table 1). Like H+, the cation CH3Hg+ reveals the coordination number 1 almost exclusively. Some ligands form also binuclear adducts (CH3Hg)2L2-λ and sulfide even forms (CH3Hg)3S+. The coordination behaviours of CH3Hg+ and H+ however are very different concerning the selection of ligands, the former being a soft and the latter a hard acid in the sense of PEARSON. The entropy ΔS of the reaction: H+ + L- → HL is more positive by about 14 c.u. than ΔS of the reaction: CH3HG+ + L- → CH3HgL. The hydrogen ion in aqueous solution has a far greater order producing action on the solvent than CH3Hg+. Two dyes also have investigated, which may serve as indicators for CH3HG+ and for the determination of pCH3Hg (= -log[CH3Hg+]).
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19650480104
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