Vol 93, No 9 (2023)

Hybrid molecules based on C₆₀ fullerene and strained polycyclic hydrocarbons were synthesized for the first time using the Bingel-Hirsch reaction. Thin films based on the synthesized hybrid compounds were obtained, and the surface morphology of these films was studied. Based on thin films of С₆₀ fullerene adducts containing fragments of conjugated polycyclic hydrocarbons, organic field-effect transistors were fabricated. The current-voltage characteristics of transistors were measured and the mobility of charge carriers was calculated.

Substituted prop-2-en-1-ones were obtained by the condensation reaction of 1-biphenyl-4-yl-ethanone with aromatic aldehydes in the presence of sodium hydroxide in an aqueous ethanol solution. Subsequent cyclization of the latter with hydrazine hydrate, phenylhydrazine, and thiosemicarbazide in an acidic medium leads to the corresponding pyrazolines. The reaction of amidine hydrochlorides with chalcones in a KOH-ethanol system leads to 2,4,6-trisubstituted pyrimidines. The luminescent and antibacterial properties of the resulting systems was studied.

A method was developed for the synthesis of new fused 3-alkyl-substituted derivatives of thieno[3,2- d ]pyrimidin-4(3 H )-ones based on 11-(2-furyl)-8,8-dimethyl-7,10-dihydro-8 H -pyrano[3′′,4′′:5′,6′]pyrido[3′,2′:4,5]-thieno[3,2- d ]pyrimidin-4(3 H )-one via nucleophilic substitution in the pyrimidine ring. A series of fused 4-amino-substituted 11-furylthieno[3,2- d ]pyrimidine derivatives was also synthesized from the corresponding 4-chloro derivative.

The review summarizes the literature data on methods for the preparation of both racemic and enantiopure 2-oxo-1,4,2-oxazaphosphorinanes - phosphorus-containing heterocyclic compounds, which are N -substituted derivatives of α-aminophosphonic/phosphinic acids. Information about the potential of their use in the synthesis of biologically active substances is also provided.

Alkylation of tris(2,6-dimethoxyphenyl)stibine Ar₃Sb, where Ar = 2,6-(MeO)₂C₆H₃, with iodoethane in chloroform resulted in [Ar₃EtSb]I, which further reacted with lead(II) nitrate to form [Ar₃EtSb]NO₃·0.75Н₂О. The comparative characterization of the complexes was carried out by X-ray diffraction analysis, IR spectroscopy, and simultaneous thermal analysis. Antimony atoms in stibonium cations have a distorted tetrahedral coordination [CSbC 106.80(12)-115.22(12)° and 105.33(14)-115.33(14)°]. In a boiling aqueous solution, [Ar₃EtSb]I, [Ar₃EtSb]NO₃·0.75Н₂О decompose to tris(2,6-dimethoxyphenyl)stibine.

Bismuth oxalates of the compositions BiOH(C₂O₄), Bi₂(C₂O₄)₃·6H₂O, Bi₂(C₂O₄)₃·7H₂O, and Bi₂(C₂O₄)₃·8H₂O were obtained by precipitation from bismuth solutions in perchloric, nitric, and hydrochloric acids with addition of oxalic acid. Compound compositions were confirmed by X-ray powder diffraction and chemical analysis, IR and Raman spectroscopy, and thermogravimetry. It has been shown that in the composition of bismuth(III) oxalate hydrates Bi₂(C₂O₄)₃· х H₂O bismuth cation is coordinated by the oxygen atoms of carboxyl groups of oxalate ions and water molecules in the same way, and compositions, taking into account the structural features, are described by the general formula {[Bi₂(C₂O₄)₃(H₂O)₄]∙( x -4)H₂O} _n . Conditions for the oxidative thermolysis of BiOH(C₂O₄) and Bi₂(C₂O₄)₃·7H₂O to yield the tetragonal modification of bismuth oxide β-Bi₂O₃ were determined.

Structural features of mononuclear octahedral dioxo complexes d ²-Re⁵⁺, [ReO₂(L_bi)(L_mono)₂], [ReO₂(L_bi)₂] with mono- and bidentate ligands were considered. The multiply bound O_oxo ligands are located predominantly in trans -positions to each other, with two exceptions, with the cis -orientaion of the ReO₂ fragment. Rhenium atoms in most complexes have the trans -octahedral ReO_oxo2X₄ (X = N, P, As, O) coordination, in two cases they have the cis -octahedral ReO_oxo2N₄ structure. Re=O_oxo bonds in d ²-Re(V) monomeric octahedral dioxo compounds ( d _average 1.772 Å) are much longer than in d ²-Re(V) monooxo complexes ( d _average 1.676-1.699 Å).