Showing papers on "Organomercury Compounds published in 1967"

Organomercury compounds. IV. Infrared spectra, structures, and thermal decomposition of mercuric arylsulphinates

Abstract: The structures of mercuric benzenesulphinate and p-toluenesulphinate have been investigated by infrared spectroscopy, and it has been shown that the arylsulphinate ions are coordinated to mercury through sulphur and not through oxygen. Thermal decomposition of the benzenesulphinate, at the melting point or in toluene, gives good yields of diphenylmercury. No di-p-tolylmercury is obtained from pyrolysis of the p-toluenesulphinate in absence of a solvent, but a moderate yield is obtained when the compound is decomposed in boiling toluene.

Field methods for determining certain organomercurial vapours in air

Abstract: Two methods are proposed for determining the vapours of certain organomercury compounds in air, at concentrations in the region of 10 µg of mercury per cu.m. The mercurial vapours are collected either on a glass-fibre pad treated with cadmium sulphide, or on a fluidised bed of active carbon. Mercury vapour is released by heating, and is determined by comparing the colour produced on selenium sulphide test-papers with a range of standard colours. The cadmium sulphide method is applicable to the determination of ethylmercury chloride, ethylmercury phosphate, diphenylmercury and methylmercury dicyandiamide; the fluidised-bed method is also applicable to this range of compounds and, in addition, to diethyl mercury. Mercurial dusts can be determined by the cadmium sulphide method, and mercury vapour by a slight modification of the fluidised-bed technique. In both methods the apparatus used is simple to manipulate and the time needed for a complete determination is less than 30 minutes.

Mechanism of reactions of electrophilic substitution at a saturated carbon atom

Abstract: CONTENTS I. Introduction 164 II. Bimolecular electrophilic substitution (SE2) at a saturated carbon atom 164 III. Symmetrisation of organomercury compounds with the aid of diphenylmercury 166 IV. Stereochemistry of the SE2 reactions 166 V. Unimolecular electrophilic substitution at a saturated carbon atom 166 VI. Anionic catalysis of one-alkyl isotopic exchange 168 VII. Halodemercurations 169 VIII. Protodemercuration 170 IX. "Internal catalysis" in SE reactions of organomercury compounds 171 X. The reactivity of organomercury compounds of the alkene and aromatic series 173

Organomercury compounds. Part V. Preparations of pentachlorophenylmercury compounds by decarboxylation reactions

Abstract: Mercuric pentachlorobenzoate and arylmercuric pentachlorobenzoates, RHgOCO·C6Cl5(R = Ph, p-MeC6H4, or p-MeO·C6H4), undergo decarboxylation in boiling pyridine to give bispentachlorophenylmercury and arylpentachlorophenylmercurials, respectively. Reactions of phenylmercuric chloride, p-tolymercuric chloride, and mercuric chloride with thallous pentachlorobenzoate in boiling pyridine yield pentachlorophenylphenylmercury, pentachlorophenyl-p-tolymercury, and pentachlorophenylmercuric chloride, respectively.