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Catalytic phosphorylation of α-trifluoromethylbenzyl alcohols with POCl 3 taken in a ratio of 3 : 1 under particular temperature conditions afforded predominantly symmetrical tris(α-trifluoromethylbenzyl) phosphates. The latter were obtained as mixtures of two diastereomers with a statistical...
Gas-phase reaction of acetylene with HgCl 2 resulting in β-chlorovinylmercury derivatives and their interaction with Cl – and I – anions and KI molecule was studied by the ab initio MP2 method with the Dunning—Hay double zeta basis set and LanL pseudopotential for Hg, K, and I atoms. The...
Multiple Attenuated Total Reflectance (MATR) IR spectra of solutions of methanesulfonic acid (MSA) in 2-pyrrolidone (Pyr) (0—100 % MSA) were examined at 30 °C. Depending on the ratio of components, two types of species with strong symmetric H bonds are formed: uncharged quasi-ion pairs of 1 :...
The reactions of perfluoro-2-methylpent-2-en-3-yl isothiocyanate with ambident N,O- and N,S-nucleophiles (thiazole-2-thione, pyridine-2-thione, 2-hydroxypyridine, benzothiazole-2-thione, benzoxazole-2-thione, 3,4,5,6-tetrahydropyrimidine-2-thione) in the presence of triethylamine yield only 2- N...
Heating of 6-amino-1,3-dimethyluracil with hexafluoroacetone and ethyl trifluoropyruvate benzoylimines in DMF in the presence of Et 3 N results in 1,3-dimethyl-7-phenyl-5,5-bis(trifluoromethyl)-1,2,3,4,5,8-hexahydropyrimido(4,5- d )pyrimidine-2,4-dione and...
The chemical composition of the above-ground parts of Astragalus danicus and A. inopinatus collected in the Baikal region (Eastern Siberia) was studied for the first time. From A. danicus , pentacyclic triterpene saponins were isolated and identified, viz ., 3- O...
A new method was developed for the synthesis of fluorine-containing functionally substituted vinyl sulfides and ketene dithioacetals from the corresponding derivatives of α-trifluoromethyl-substituted CH-acids and thiols in the presence of BF 3 ·NEt 3 .
The retention factors of C1—C9 n -alkanols on a capillary column with the SE-30 nonpolar phase were determined for temperatures between 320 and 400 K. From the temperature dependence of the free energy change, variations in the enthalpy of sorption of n -alkanols on the SE-30 polymethylsiloxane...
The new cubane cluster complex K 6 (Ta 4 (μ 4 -O)(μ 3 -Te) 4 (CN) 12 )·KOH·4H 2 O was prepared from a mixture of TaTe 4 and KCN by the high-temperature synthesis followed by crystallization from aqueous solutions. The compound was characterized by cyclic voltammetry, X-ray diffraction...
2,6-Di- tert -butylphenols containing the Pt—SnCl 3 and Pt—GeCl 3 groups in the para position exert a dual effect on the oxidation of methyl oleate by molecular oxygen. Initially, these compounds act as antioxidants producing the corresponding phenoxyl radicals whose decomposition is...
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