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The possibility of controlling the physicochemical properties of suspensions and the electrical properties of filled latex composites containing dispersed ferroelectrics was examined. The use of ferroelectrics as fillers allows preparation of polymeric composites with high dielectric constant ɛ and low dielectric loss, used, e.g., for the development of dielectric functional layers of electroluminescence light sources.

The possibility of controlling the physicochemical and electric properties of conducting latex composites based on butadiene-acrylonitrile latex and carbon fillers, using data on the content of active centers on the filler surface and their distribution with respect to donor-acceptor properties, was examined. To make the fillers compatible with the latexes and prevent their coagulation, the fillers were modified with Leukanol.

Substituted ethanone oximes react with S2Cl2 and pyridine to give 1,2,3-dithiazolium chlorides. The treatment of these products with malonodinitrile in dichloromethane affords 4-substituted 5 H-1,2,3-dithiazol-5-ylidenes. The reaction of the latter compounds with n-butylamine unexpectedly yielded addition products at one of the nitrile groups, viz. substituted 1,2,3-dithiazol-5-ylideneethanimidamides.

Chemical ligations to form native peptides from N→N acyl migrations in Trp-containing peptides via 10- to 18-membered cyclic transition states are described. In this study, a statistical, predictive model that uses an extensive synthetic and computational approach to rationalize the chemical ligation is reported. N→N acyl migrations that form longer native peptides without the use of Cys/Ser/Tyr residues or an auxiliary group at the ligation site were achieved. The feasibility of these traceless chemical ligations is supported by the N-C bond distance in N-acyl isopeptides. The intramolecular nature of the chemical ligations is justified by using competitive experiments and theoretical calculations.

5-Oxo[1,3]dithiolo[4,5-d][1,3,2]dithiazol-1-ium chloride was converted into [(4-sulfanylidene-4H-1λ4,3,2-dithiazol-5-yl)sulfanyl]-formic acid esters and amides upon treatment with alcohols and amines, respectively; the structure of propyl [(4-sulfanylidene-4H-1λ4,3,2-dithiazol-5-yl)sulfanyl]formate was confirmed by X-ray diffraction.

The synthesis of 5-oxo[1,3]dithiolo[4,5- d ][1,3,2]dithiazol-1-ium chloride 1a from easily available zink chelate, TEA[Zn(DMIT) 2 ], has been developed; salt 1a has been converted to the first representative of [1,3]dithiolo[4,5- d ]dithiazolyl radical, which was identified by EPR and CV data.