[en] Dithioacids of phosphorus react with p-vinylbenzyltrimethylstannane forming anti-Markovnikov addition products. Reaction with S-trimethylsilyldithiophosphate proceeds with cleavage of the Sn-C bond. In the reaction of dimethoxyphosphorylsulfenyl chloride with p-vinylbenzyltrimethylstannane both reactive centers of the unsaturated compound participate. Phenylsulfenyl chloride attaches solely at the C-C double bond of the organotin partner. The difference in the course of these processes is caused by the different structures of the first intermediates. A comprehensive analysis is made of IR and NMR spectral data including the categorizing of chemical shifts and spin-spin coupling constants for all products

[en] The reduction of phosphabicyclodecanones containing 3- and 4-coordinate phosphorus with lithium tetrahydroaluminate and with aluminum isopropoxide was studied. It was shown that in both cases epimeric pairs of secondary alcohols are formed; the proportions of the individual epimers depend on the nature of the reducing agent. The structures of the phosphabicyclodecanols synthesized and their acetates were established on the basis of ¹H and ³¹P NMR data

[en] By the heterofunctional condensation of organosilicon cyclic branched tetrols with alkyl- and aryl-trichlorosilanes dichloroorganospirotricyclosiloxanes were prepared in which the silicon atoms of the side rings were framed with methyl and ethyl groups. Analysis of the ¹H and ²⁹Si NMR spectra revealed the existence of cis and trans forms of 4,16-dihydroxy-2,2,6,6,14,14,18,18-octamethyl-4,10,10,16,21,21-hexaphenyldispiro[7.3.7.3]-decasiloxane

[en] The reactions of 2-propynyl hydrogen and propadienylphosphonite with some carbonyl compounds and azomethines lead to the formation of the corresponding propadienylphosphinic esters. The reactions of (3-methyl-1,2-butadienyl) phosphonous acid with aromatic aldehydes is accompanied by heterocyclization with the formation of 1,2-oxaphosphol-3-enes

[en] It was shown earlier that the determination of the composition and type of the complexes is possible by the use of the NMR method applied to various nuclei. This method is based on the simultaneous solution of equations describing the concentration dependence of the NMR chemical shifts for the various nuclei in the system and material-balance equations. It has been applied to the investigation of complex-formation and proton-transfer processes in the nitric acid-water system. In the present work the authors studied aqueous solutions of an acid that is weaker than nitric acid, namely trifluoroacetic acid, both of the usual isotopic composition, and also a sample deuterated to the extent of 97.65%, in the concentration range of 0-100 mole %. The considerable changes in the chemical shifts of the ¹H, ¹³C, and ¹⁹F nuclei, depending on the concentration, indicate the formation of complexes of various types and compositions

[en] 1-Phenoxy-2-thiocyanatoethene undergoes reaction with phosphorus pentachloride with the participation of two reaction centers, vinyl and thiocyanate groups, to form a phosphorus-containing heterocycle, a derivative of 1,3,4-thiazaphosph-2-ole. Transformations of the phosphorylation product were studied. The ¹H, ³¹P, and ¹³C NMR spectra were recorded on a WP-200SY Bruker spectrometer at room temperature. The stabilization was carried out with respect to a deuterium signal in CDCl₃. The ³¹P NMR signals were recorded relative to 85% H₃PO₄ as external standard (the positive values designate shift to the weak field) with a heteronuclear broadband uncoupling from protons

[en] A feature of the homolytic hydrophosphorylation of alkynes, as compared with alkenes, is more ready addition of phosphinous acids in presence of benzoyl peroxides. A difference was found in the hydrophosphorylation of acetylenes with dibutylphosphinous acid and with diarylphosphinous acids: the latter tend to form diaddition products

[en] To construct the wave functions of the excited states of aromatic amines, it is sufficient to use the singly excited configurations π,π* of the aromatic portion of the molecule and conformations with charge transfer from the orbital of the unshared electron pair to the ring. The purpose of this work was to establish the main principles of the photodissociation of aniline and its derivatives and the influence of intermolecular interactions on the photochemical properties of these compounds

[en] In continuation of the authors study of phosphorylation of acetamides we found that N-acetylurea reacts readily with both a solution and with a dispersion of PCl₅ in benzene to form 2,6-dichloro-1,3,4-diazaphosphorine (I), a crystalline compound which is stable during distillation in vacuo, but which hydrolyzes in air. Compound (I) is soluble in benzene, diethyl ether, and chloroform. The elemental analysis and ³¹P, ¹H, and ¹³C NMR and ³⁵Cl NQR spectroscopy data conform well with the proposed structure of compound (I)

[en] This paper examines new methods for the chemical grafting of azo compounds to silica which include the minimum number of successive reactions on the surface of the carrier, and to study some physicochemical properties of the materials obtained. The authors studied various methods of obtaining aromatic amines fixed on silica. The simplest of these consisted in the reactions of bromopropyl groups grafted on the surface with sodium O- and p-aminophenoxides (the use of silica with grafted chloropropyl groups gives worse results.)