Abstract: A novel compound bis-(N,N-dimethyl-N-carbodecyloxymethyl-N-ethyleneammonium)-sulphide dichloride of the formula ##STR1## A method for preparing said novel compound comprising quaternization of bis-(.beta.-dimethylaminoethyl)-sulphide with monochloroacetic acid decyl ester, molar ratio of said reagents being not more than 1:2.A chemotherapeutic antimicrobial preparation comprising said novel compound as an active principle in combination with a pharmaceutical carrier.A plant growth regulator in the form of an aqueous solution of said novel compound in a concentration of from 0.0001 to 0.1 wt. %.

Abstract: The method for preparing cross-linked vinylaromatic polymers containing nitro groups having the general formula ##STR1## where R' is H, NO.sub.2, COOH, SO.sub.3 H, P(O)(OH).sub.2, or P(O)H(OH), m is from 60 to 99 and n is from 40 to 1, consists in treatment of the starting cross-linked polymers having the general formula ##STR2## where R is H, COOH, SO.sub.3 H, P(O)(OH).sub.2, or P(O)(OH), m is from 60 to 99 and n is from 40 to 1, with a mixture of an alkali metal nitrate and an acid agent, at a temperature from -5.degree. to 95.degree. C. The quantity of the alkali metal nitrate in the nitrating mixture is from 0.1 to 8 moles per mole of the starting cross-linked polymer.The method provides conditions for preparing cross-linked vinylaromatic polymers, containing nitro groups, having higher mechanical strength, high osmotic stability, and their volume in an ion-exchange column changes insignificantly as acid media are changed for alkaline, and vice versa.

Abstract: Novel compounds, viz., tris(perfluoroalkyl)phosphine oxides have the following general formula ##STR1## where R.sub.F is a perfluoroalkyl of normal and iso-structure, having from 2 to 8 carbon atoms.The method of preparing said compounds consists in that trialkylphosphine oxide having the general formula R.sub.3 PO, where R = C.sub.8 -C.sub.8, is fluorinated electrochemically in a medium of anhydrous hydrogen fluoride; whenever trialkylphosphine oxides having the general formula R.sub.3 PO, where R = C.sub.5 - C.sub.8, are used as the starting material, they are first brominated in a medium of anhydrous hydrogen fluoride, with subsequent isolation of the end product.The proposed novel compounds can be used as solvents for salts of rare earth elements and as complexing agents in the separation of valuable metals.

Abstract: The method for producing trialkylphosphine oxides having the general formula R.sub.3 PO, where R is an alkyl having from 1 to 16 carbon atoms, consists in that red phosphorus reacts with an alkyl iodide in the presence of a catalyst -- iodine or hexaalkyliodophosphoranephosphonium pentaiodide -- while gradually adding alkyl iodide to the reaction mixture, and maintaining the reaction temperature at 180.degree. - 230.degree. C., with subsequent isolation of the end product.The proposed method simplifies the process for preparing trialkylphosphine oxides, increases the yield of the end product to 80- 90 per cent by weight, rules out side reactions of dehydrohalogenation of alkyl iodides, and also shortens the process to 8- 10 hours.