Ion association in tetraalkylammonium pertechnetate solutions

The solubility of tetraalkylammonium pertechnetates in aqueous electrolyte solutions has been studied. It does not practically depend on ionic strength of the solution when specific interaction of own ions and ions of the dissolved electrolyte (e.g. LiNO₃ up to 5 mol/l) does not occur. A remarkable dependence of Bu₄NTcO₄ solubility on acidity of the solution has been found. The influence of ion association on the solubility is discussed.     

Caste and Population Specificity of Termite Cuticule Hydrocarbons

The composition of hydrocarbons from the termites Reticulitermes lucifugus Rossi and Kalotermes flavicollis Fabr. belonging to different castes and populations was determined using GC and mass spectrometry. The role of cuticular hydrocarbons in olfactory recognition of termite caste and population status was demonstrated.__________Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 3–6, January–February, 2005.     

473—Model reactions of nucleotide sorption: Part II. Effect of hydrogen ion activity on the ATP magnesium salt binding on the interface in hydrocarbon-water-CTAB (SDS) systems

The present work is concerned with the binding of the nucleotides (ATP, ADP) on the interface in hydrocarbon-water-CTAB and hydrocarbon-water-SDS (for ATP) model systems in the presence of Mg²⁺ ions. It has been shown that magnesium salts of ATP and ADP, unlike free anions, bind with the interface in the hydrocarbon-water-CTAB system without affecting either the interphase tension value (σ) or that of the potential jump (Δψ). It has also been demonstrated that the binding of ATP with the interface in the decane-water-SDS system occurs only in the presence of Mg²⁺ ions.On addition, a study has been made of the effect of the hydrogen ion activity on the binding of the ATP magnesium salt in the above systems. Model experiments indicated that there are at least two types of heterogeneous systems, in which the binding of the ATP magnesium salt with a charged interface is controlled by the hydrogen ion activity. In both cases studied, the rise in this activity causes desorption of the nucleotide salt from the interface.     

Electrophilic addition of lead tetraacetate to 2-carene in an acidic medium

Oxidation of 2-carene by lead tetraacetate in acetic acid afforded p-menth-1(10),2-dien-7-ol, 2-acetyl-6,6-dimethylbicyclo[3.1.0]hexane, p-menth-2-ene-1,7-diol, p-menth-1-ene-3,7-diol, and 2-(m-tolyl)propanol-2.Deceased.A. M. Butlerov Scientific Research Chemical Institute, V. I. Ul'yanov-Lenin Kazan' State University, 420008 Kazan. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 147–150, January, 1992.     

Indoles

The Fischer cyclization of cyclohexanone m-tolylhydrazone under various conditions always gives a mixture of isomers (5-methyl- and 7-methyl-1,2,3,4-tetrahydrocarbazole) with predominance of the 7-methyl isomer.See [1] for communication XVIII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 58–60, January, 1971.     

Some azole derivative phosphoric and thiophosphoric esters

Reaction of spiro[cyclohexane-1, 2-oxazolidine] (I) with phosphorochloridic and phosphorochloridothionic acids gave the corresponding ethers. It did not prove possible to prepare derivatives containing dispiro[cyclohexane-1, 2′-oxazolidine] radicals. Reaction of 2-thio-5, 5-dimethyloxazolid-4-one with diethylphosphorochloridate led to isolation of an alkylation product. 5, 5-Dimethylhydrantoin did not react with chlorides of phosphoric acid under the reaction conditions of these particular experiments.     

Indoles

The cyclization of diethyl ketone m-nitrophenylhydrazone under different conditions always gives a mixture of the isomeric 4-nitro-3-methyl-2-ethylindole and 6-nitro-3-methyl-2-ethylindole, generally with a certain predominance of the former. The isomer ratio depends on the nature of the catalyst used. Only 6-nitro-2,3,3-trimethylindolenine is formed in the cyclization of methyl isopropyl ketone m-nitrophenylhydrazone.See [1] for communication XXXIV.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 37–39, January, 1973.