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We report on the results of experimental investigations of plasma discharges in air during which red Flashes similar to those arising in the upper layers of atmosphere have been observed. In addition, it was shown that under the influence of acoustic waves in the atmosphere, a response in the form of visible radiation was brought about, and pulsed electromagnetic waves were generated.

The structures of the potential anti-human-immunodeficiency virus type 1 (HIV-1) non-nucleoside reverse transcriptase inhibitors (NNRTI) 1-tert-butoxycarbonyl-2-phenylpyrrolidine-2-carboxylic acid, C(16)H(21)NO(4), (I), and 2-ammoniomethyl-1-benzyl-5-oxo-2-phenylpyrrolidine chloride, C(18)H(21)N(2)O(+).Cl(-), (II), have been investigated by X-ray diffraction. The investigations confirm a butterfly-like conformation for both compounds. In (I), the pyrrolidine ring has a marked half-chair conformation, while it has a weakly pronounced envelope conformation in (II). Intermolecular hydrogen bonds, viz. O-H.O in (I), and N-H.O and N-H.Cl in (II), build infinite chains in both structures. Rotational disorder of the three methyl groups is observed in (I).

A hydrothermally CaO–SiO2–H2O system was investigated at 150°–200°C, 2.5 h (CaO:SiO2=0.95) using various modifications of SiO2 in the presence of a mineralizer. Synthetic (stabilized) γ‐tridymite is the most reactive among SiO2 modifications. In the reaction mixture, the optimal concentration of the mineralizer (KOH) is 2% (versus the solid phase). The binding degree of CaO with SiO2 practically is 100% at 150°C. It is impossible to synthesize CSH free of C2SH on the basis of β‐cristobalite and β‐quartz under the investigation conditions without the use of mineralizer. The calorimetric effects as well as heat of de‐hydration of hydrosilicates were determined during their transformation into wollastonite. The entropy change at the peaks has been calculated.

A procedure has been developed for the synthesis of ethyl 1-benzoyl-4-chloro-2-phenylpyrrolidine-2-carboxylate and 4-chloro-5-oxo-1,2-diphenyl-, 1-benzoyl-2-(2-benzyloxy-5-chlorophenyl)-4-chloro-, and 1-benzoyl-2-(4-benzyloxyphenyl)-4-chloropyrrolidine-2-carbonitriles in high yields via intramolecular cyclization of the corresponding 2,3-dichloropropionamides under conditions of phase-transfer catalysis.