Abstract: Preparation of 2,3-dichloro-5-trichloromethylpyridine in high yields and purity by chlorinating 2-chloro-5-trichloromethylpyridine at 70.degree. to 250.degree. C. with chlorine in the presence of a catalyst containing one or more molybdenum, tungsten or ruthenium compounds.

Abstract: Ether cleavage in transesterifications of pyridyloxyphenoxy alkanoic acid compounds is reduced by employing titanium compounds as catalysts.

Abstract: Preparation of 2,3-dichloro-5-trichloromethylpyridine in high yields and purity by chlorinating 2-chloro-5-trichloromethylpyridine at 70.degree. to 250.degree. C. with chlorine in the presence of a catalyst containing one or more molybdenum, tungsten or ruthenium compounds.

Abstract: The novel compound (1,4)Dithiino(2,3-b) (1,2,5)-thiadiazole(3,4-e)pyrazine-6,7-dicarbonitrile, its method of use in the control and kill of bacteria and fungi, and compositions containing the novel compound as the active ingredient therein are claimed.

Abstract: The novel compounds corresponding to the formula ##STR1## or of the formula ##STR2## wherein R is a thiadiazole radical. These compounds exhibit utility in the control and kill of bacteria and fungi.

Abstract: Novel 1,4-Dithiinopyrazinetetracarbonitriles are disclosed. Their method of use in the control and kill of bacteria and fungi, and compositions containing the novel compounds as the active ingredients therein are claimed.

Abstract: Novel compounds corresponding to the formula ##STR1## wherein n, n' and x are, individually, 0 or 1. These compounds exhibit utility in the control and kill of bacteria and fungi.

Abstract: Novel (1,4)Dithiino(2,3-b)(1,3)thiazole-(4,5-e)pyrazine-6,7-dicarbonitriles, the ir method of use in the control and kill of bacteria and fungi, and compositions containing the novel compounds as the active ingredients therein are claimed.

Abstract: Processes for preventing marine fouling which employ either p-Dithiino(2,3-b)pyrazine-2,3-dicarbonitrile, 1,3-Dithiolo(4,5-b)pyrazin-2-ylidene-propanedinitrile or mixtures thereof.

Abstract: The novel compounds corresponding to the formula ##STR1## wherein x is 3 or 4. These compounds exhibit utility in the control and kill of bacteria and fungi.

Abstract: The compound of this invention is prepared by reacting phenol as such or as its alkali metal phenate with dichlorodifluoroethylene to form 2,2-dichloro-1,1-difluoroethoxybenzene and reacting the latter with chlorosulfonic acid and recovering the reaction product. The compound of this invention, when reacted with acrylonitrile gives the antimicrobial compound, 2-chloro-3-(4-(2,2-dichloro-1,1-difluoroethoxy)phenyl)sulfonyl)propanenitr ile.

Abstract: Compounds are prepared which correspond to the formula ##STR1## wherein n represents an integer of 0 to 3; p represents an integer of 0 to 2 and the sum of n + p is an integer of 0 to 3; and r is 0 or 1. These compounds have been found to be active as pesticides and find particular usage as fungicides, bactericides, nematocides and herbicides.

Abstract: The compound 3-((4-(2,2-dichloro-1,1-difluoroethoxy)-2-methyl-5-nitrophenyl)sulfonyl)-2 -propenenitrile. The compound has antimicrobial activity.

Abstract: The novel compounds corresponding to the formula ##STR1## wherein R is either H or CX.sub.3, with each X substituent being individually selected from the group consisting of H and X' wherein X' is either F or Cl, are prepared by reacting di(sodiomercapto)methylenemalononitrile with the corresponding 5,6-dihalothiazolo(4,5-b)pyrazine in dimethylformamide as a reaction medium at a temperature between about 0.degree. C and about 60.degree. C until the reaction is substantially complete. The novel compounds of the present invention have antimicrobial activity.

Abstract: (1,3-Dithiolo(4,5-b) (1,2,5)thiadiazolo(3',4'-e)pyrazin-6-ylidene)-propanedinitrile is prepared by reacting di(sodiomercapto)methylenemalononitrile with 5,6-dichloro-1,2,5-thiadiazole(3,4-b)pyrazine in dimethylformamide as reaction medium at a temperature between about 20.degree. C and about 60.degree. C until the reaction is substantially complete. The reaction product has antimicrobial utility.

Abstract: The new compound 1,3-dithiolo(4,5-b)pyrazin-2-ylidene-propanedinitrile 4-oxide is prepared by reacting substantially equimolar proportions of di-(sodiomercapto)methyleneamalononitrile with 2,3-dichloropyrazine 1-oxide. The compound has fungicidal, algicidal and marine antifoulant utility.

Abstract: 2-(Dicyanomethylene)-1,3-dithiolo(4,5-b)pyrazine-5,6-dicarbonitrile is prepared by reacting di(sodiomercapto)methylenemalononitrile with 2,3-dichloro-5,6-dicyanopyrazine in dimethylformamide as reaction medium at a temperature between about 25.degree. and about 60.degree. C until reaction is substantially complete. The reaction product has antimicrobial utility.

Abstract: The title compound is prepared by reacting trichloroethenylthiophenylsulfonyl chloride with acrylonitrile in the presence of a small amount of cupric chloride, acetonitrile and triethylamine hydrochloride, recovering the product from the reaction medium.

Abstract: 3-((4-(2,2-Dichloro-1,1-difluoroethoxy)phenyl)sulfonyl)-2-propenenitrile is prepared by mixing together 2-chloro-3-((4-(2,2-dichloro-1,1-difluoroethoxy)phenyl)sulfonyl)propanenit rile and a slight molar excess of triethylamine in the presence of benzene as reaction medium.

Abstract: 3-((3-(Trifluoromethyl)phenyl)sulfonyl)-2-propenenitrile. The compound has antimicrobial utility.