Abstract: Disclosed are selected 3-trihalomethyl-5-ureido-1,2,4-oxadiazole and -1,2,4-thiadiazole compounds of the formula: ##STR1## wherein X is either Cl or F and Y is either O or S. These compounds are shown to be effective against agricultural viruses.

Abstract: Disclosed are selected 2-trichloromethyl-4-pyrimidinyl carbonates having the formula: ##STR1## wherein X is an atom selected from the group consisting of oxygen and sulfur; R is a lower alkyl group having 1 to 4 carbon atoms or a phenyl group; R.sup.1 is hydrogen or halo; and R.sup.2 is a lower alkyl group having 1 to 4 carbon atoms. These compounds are disclosed to be agricultural fungicides.

Abstract: Disclosed are selected 2-trichloromethyl-4-pyrimidinyl carboxylic esters having the formula: ##STR1## wherein R is a lower alkyl group having 1 to 4 carbon atoms, a lower alkenyl group having 1 to 4 carbon atoms a lower halo alkyl group having 1 to 4 carbon atoms or an unsubstituted or substituted phenyl group; R.sup.1 is hydrogen or halo; and R.sup.2 is a lower alkyl group having 1 to 4 carbon atoms. These compounds are disclosed to be agricultural fungicides.

Abstract: Disclosed are selected 5-benzamido-3-trichloromethyl-1,2,4-thiadiazole compounds of the formula: ##STR1## wherein R is phenyl which is unsubstituted or substituted by at least one member selected from the group consisting of lower alkyl having 1 to 4 carbon atoms, lower alkoxy having 1 to 4 carbon atoms, nitro and halo. These compounds are shown to have post-emergence herbicidal, fungicidal and insecticidal properties.

Abstract: Disclosed are selected 5-amido-3-trihalomethyl-1,2,4-thiadiazole compounds of the formula: ##STR1## wherein R.sub.1 is CCl.sub.3 or CF.sub.3 ; R.sub.2 is hydrogen, a lower alkyl group of 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms; and R.sub.3 is a lower alkyl group having from 2 to 4 carbon atoms, an aryl group having 6 to 8 carbon atoms, or CX.sub.3, where X is H, Cl, F or OCH.sub.3. These compounds are shown to have post-emergence herbicidal properties.

Abstract: Disclosed are selected 5-trichloromethylthioamino derivatives of 3-trihalomethyl-1,2,4-thiadiazole compounds which have the formula: ##STR1## wherein R.sub.1 is CCl.sub.3 or CF.sub.3 ; and wherein R.sub.2 is hydrogen, a lower alkyl having 1 to 4 carbon atoms, phenyl and substituted phenyl wherein said substituents are lower alkyl having 1 to 4 carbon atoms, lower alkoxy having 1 to 4 carbon atoms, amino, nitro, halo and mixtures thereof. These compounds are diclosed to be agricultural fungicides.

Abstract: Disclosed are selected thiolcarbamate derivatives of 3-trihalomethyl-1,2,4-thiadiazole compounds of the formula: ##STR1## wherein R.sub.1 is a CCl.sub.3 or CF.sub.3 group; R.sub.2 is hydrogen or a lower alkyl group of 1 to 4 carbon atoms and R.sub.3 is a lower alkyl group having 1 to 4 carbon atoms. These compounds are shown to have post-emergence herbicidal properties.

Abstract: Disclosed are selected 3-trichloromethyl-5-cyclic amine-1,2,4-thiadiazole compounds. These compounds can be applied to or spread upon soil by themselves or in inert carriers or with nitrogen-containing fertilizers to inhibit ammonium nitrification in the soil.

Abstract: Disclosed are selected biuret derivatives of 3-trihalomethyl-1,2,4-thiadiazole compounds of the formula: ##STR1## wherein R.sub.1 is a CCl.sub.3 or CF.sub.3 group; R.sub.2 and R.sub.3, separately, are either hydrogen or a lower alkyl group of 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms; and R.sub.4 and R.sub.5 are either hydrogen or a lower alkyl group of 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms or an acyl group having 1 to 8 carbon atoms, with the proviso that either R.sub.4 or R.sub.5, or both, must be a hydrogen.

Abstract: Disclosed are selected thiolcarbamate derivatives of 3-trihalomethyl-1,2,4-thiadiazole compounds of the formula: ##STR1## wherein R.sub.1 is a CCl.sub.3 or CF.sub.3 group; R.sub.2 is hydrogen or a lower alkyl group of 1 to 4 carbon atoms and R.sub.3 is a lower alkyl group having 1 to 4 carbon atoms. These compounds are shown to have post-emergence herbicidal properties.

Abstract: An improvement is disclosed in the preparation of pentachloronitrobenzene by the reaction of pentachlorobenzene with mixed nitration acid. The improvement, which is aimed at reducing undesirable impurities in the product, includes the use of a selected process step, wherein excess, unreacted nitric acid is reacted with HCl.

Abstract: Process for making highly pure pentachloronitrobenzene (PCNB) by the nitration of pentachlorobenzene (PENTA).

Abstract: A novel compound is described which is useful as a reversible oxygen carrier. This chelate compound is bis(3,5-difluorosalicylaldehyde)ethylenediimine-Co.sup.+.sup.2.

Abstract: p-Fluoro-m-phenylenediamine is prepared by deoxygenation and hydrofluorination of m-nitroacetanilide by the reaction of m-nitroacetanilide with anhydrous hydrogen fluoride at a temperature of 0.degree.-230.degree.C under a pressure of 15 to 1,500 psia in the presence of certain sulfur and phosphorus containing deoxygenating agents.

Abstract: A process is provided for preparing ortho substituted aryl fluorides from corresponding diazonium fluorides. More particularly, the invention relates to a method for thermally decomposing diazonium fluorides substituted in the ortho position with halogen or trihalomethyl to a corresponding aryl fluoride. The method involves heating the diazonium fluoride to a temperature above its decomposition temperature and above the temperature at which the resulting product distills by contacting the same with a heat exchange medium at a temperature in the range of 100.degree.-350.degree.C.