ASSESSMENT OF ENVIRONMENTAL RISKS OF THE PETROLEUM SUPPLY SYSTEM

Gas stations are objects of increased fire and environmental hazard, which is due to the significant volume of stored fuel, the presence of equipment operating both at atmospheric and elevated pressure, the peculiarities of conducting technological operations associated with the reception, storage and delivery of fuel, the possibility of locating the gas station within the boundaries of dense buildings settlement.The paper analyzes the environmental risks posed by three gas stations in the city of Angarsk. It was found that in the process of their operation, additional pollution enters the city atmosphere through the seals of fixed joints and shut-off and control valves, the tank farm. Emissions from these sources are fugitive. During periods of unfavorable meteorological conditions, there will be an accumulation of harmful substances in the surface layer of the atmosphere, the concentration of impurities in the air can sharply increase

Highly Selective Synthesis and Fungicidal Activity of the Novel 2-Alkylthio-5-Amino-1,3,4-Thiadiazoles

ABSTRACT Selective alkylation of 5-amino-1,3,4-thiadiazole-2-thione with alkyl (C2-C9) halides have been studied and exclusively S-alkyl derivatives were obtained in excellent yields. It was found that the alkylation products in the presence of amino group or a nitrogen atom in position 3 are not observed. Reaction conditions, structure and fungicidal activity of the synthesized compounds have been investigated. It was found that the obtained S-alkyl derivatives have weak activity against Xanthomonas malvacearum bacteria

N-(5-Benzylsulfanyl-1,3,4-thiadiazol-2-yl)-2-(piperidin-1-yl)acetamide

The title compound, C16H20N4OS2, was synthesized by the reaction of 2-benzylsulfanyl-5-chloroacetamido-1,3,4-thiadiazole and piperidine in a 1:2 ratio. The planes of the acetamide and 1,3,4-thiadiazole units are twisted by 10.8 (4)°. The thiadiazole S atom and the acetamide O atom are syn-oriented due to a hypervalent S...O interaction of 2.628 (4) Å. In the crystal, molecules form centrosymmetric dimers via N—H...N hydrogen bonds. These dimers are further connected by C—H...O interactions into (100) layers