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Showing papers on "Organomercury Compounds published in 1968"


Book ChapterDOI
TL;DR: Formulations containing organo- mercurials have been found to give a better control of fungal diseases of grain than non-mercurial formulations.
Abstract: Mercury compounds were first used in Germany as seed dressings to control seed-borne diseases of cereals about 1914. ‘Uspulun’, described as a ‘chlorophenolmercury’ compound was placed on the market in 1915 by Bayer A.G. as a liquid dressing and was soon widely used. Dusts, such as ‘Ceresan’, at first having phenylmercury acetate as the active ingredient and, subsequently, a methoxyethylmercury compound, and ‘Agrosan’, a tolylmercury acetate formulation, became more widely used ten years later. Liquid treatments, using alkylmercury active ingredients, were reintroduced about the time of World War II because of the reduced hazards and inconvenience to operators dressing the grain in specially designed machines, although alkylmercury compounds are more toxic than arylmercurials. In Sweden it has recently been found that the extensive use of alkylmercury compounds can lead to harmful contamination of the environment and there they have been replaced by other organomercury compounds. In most countries both liquid and dust treatments are commonly used. Formulations containing organo- mercurials have been found to give a better control of fungal diseases of grain than non-mercurial formulations.

50 citations


Journal ArticleDOI
TL;DR: Pentafluorophenylmercuric carboxylates, C6F5HgOCOR (R = CF3, CHF2, CH2F, or CH3), have been prepared by reaction of pentafluornobenzene with the appropriate mercuric carbonylate as mentioned in this paper.
Abstract: Pentafluorophenylmercuric carboxylates, C6F5HgOCOR (R = CF3, CHF2, CH2F, or CH3), have been prepared by reaction of pentafluorobenzene with the appropriate mercuric carboxylate. The compounds are monomeric in toluene, and their infrared spectra suggest the presence of unidentate carboxylate groups. Mercuration of pentafluorobenzene with mercuric trifluoroacetate, followed by reaction of the crude product with sodium iodide in aqueous ethanol, gives a good yield of bispentafluorophenylmercury.

14 citations







Patent
31 Oct 1968
TL;DR: In this article, the authors present a taxonomy of PHENYL and ALKYL-SUBSTITUTED PHENYCLOSES, where the taxonomy can be used in CONTROLLING UNDESIRABLE VEGETATION or in PLANT DEFOLIATION without KILLING the PLANT ITSELF.
Abstract: ORGANOMERCURY COMPOUNDS HAVING THE FORMULA: R-HG-X-C(=X)-N(-R'')-R" WHEREIN R IS PHENYL OR AN ALKYL-SUBSTITUTED PHENYL GROUP HAVING UP TO 12 CARBON ATOMS, R'' AND R" ARE ALKYL GROUPS HAVING UP TO SIX CARBON ATOMS, AND X IS SULFUR WHICH POSSESS HERBITOXIC PROPERTIES. THEREFORE, FORMULATIONS CONTAINING SUCH COMPOUNDS ARE USEFUL IN CONTROLLING UNDESIRABLE VEGETATION OR IN PLANT DEFOLIATION WITHOUT KILLING THE PLANT ITSELF.

2 citations


Patent
31 Dec 1968

2 citations


Journal ArticleDOI
TL;DR: In this paper, the chemical properties of α-mercurated sulfones by way of example of methylphenylsulfone derivatives were studied and it was shown that the sulfonyl group has a stabilizing effect with respect to electrophilic attack at the mercury-carbon bond and promotes resistance to spontaneous symmetrization of unsymmetric organomercury compounds of the type RHgR′.
Abstract: 1. We have studied the chemical properties ofα-mercurated sulfones by way of example of methylphenylsulfone derivatives. 2. It is shown that the sulfonyl group has a stabilizing effect with respect to electrophilic attack at the mercury-carbon bond and promotes resistance to spontaneous symmetrization of unsymmetric organomercury compounds of the type RHgR′. 3. The infrared spectra indicate the absence of conjugation and coordination of the mercury atom with the sulfonyl group.

1 citations


Journal ArticleDOI
TL;DR: The reactions take place via intermediate stages of formation of silico-acetylene organomercury compounds as mentioned in this paper, and they have been studied the reactions of ethinylsilane with mercuric acetate and iodine and found a method of obtaining iodoethinylsilanes.
Abstract: 1. We have studied the reactions of ethinylsilanes with mercuric acetate and iodine and found a method of obtaining iodoethinylsilanes. 2. The reactions take place via intermediate stages of formation of silico-acetylene organomercury compounds.

Journal ArticleDOI
TL;DR: In this paper, the trichloromethylmercury RHgCCl3 (R=n-C3H7, cyclo-C6H11, C6H5CH2, and C 6H5) was obtained in almost quantitative yield by the reaction of the corresponding mercury tert-butoxides RHgOC(CH3)3 with chloroform at room temperature.
Abstract: Derivatives of trichloromethylmercury RHgCCl3 (R=n-C3H7, cyclo-C6H11, C6H5CH2, and C6H5), which are stable in the absence of air, were obtained in almost quantitative yield by the reaction of the corresponding mercury tert-butoxides RHgOC(CH3)3 with chloroform at room temperature.