Synthesis of 3,4,4'- and 2',3,4-Triaminodiphenyl Ethers

Procedures were developed for preparing 3,4,4'- and 2',3,4-triaminodiphenyl ethers by the reaction of 4-acetylaminophenol with, respectively, 4-nitro- or 2-nitrochlorobenzene, followed by nitration of the resulting 4-acetylamino-4'- or -2'-nitrodiphenyl ether, hydrolysis of the product, 4-acetylamino-3,4'- or -2',3-dinitrodiphenyl ether, and reduction of 4-amino-3,4'- or -2'-3-dinitrodiphenyl ether.     

Derivatives of Methyl N-[5(6)-(4-Aminophenylsulfanyl)benzimidazol-2-yl]carbamate and Phthalic Anhydrides. Synthesis and Biological Properties

Products of the reactions methyl N-[5(6)-(4-aminophenylsulfanyl)benzimidazol-2-yl]carbamate with phthalic anhydrides, involving the aniline nitrogen atoms, were obtained. Biological properties (embryotoxicity and toxicity) of the products and their mixtures with phase-transfer catalysts were studied. On this basis, new antihelminthic agents were developed.     

Nitration of 4-Acetylamino-4'-nitrodiphenyl Sulfide

Procedures have been developed for the acylation of 4-amino-4'-nitrodiphenyl sulfide with an almost quantitative yield by the action of acetic anhydride in aprotic organic solvents and subsequent nitration of 4-acetylamino-4'-nitrodiphenyl sulfide with nitric acid in a mixture of acetic acid and an aprotic organic solvent with addition of a mixture of sulfuric and acetic acids by the end of the process.     

Nitration of 4-Acetylamino-4'-nitro-, 4-Acetylamino-2'-nitrodiphenyl Sulfides and 4-Acetylamino-2'-nitrodiphenyl Ether

Nitration of 4-acetylamino-4'-nitrodiphenyl sulfide, 4-acetylamino-2'-nitrodiphenyl sulfide, and 4-acetylamino-2'-nitrodiphenyl ether yields respectively 4-acetylamino-3,4'-dinitrodiphenyl sulfide, 4-acetylamino-2',3-dinitrodiphenyl sulfide, and 4-acetylamino-2',3-dinitrodiphenyl ether.     

Lutetium complexes with the 1,3-diphenylcyclopentadienyl ligand. Syntheses and molecular structures of the complexes {(Ph2C5H3)Lu(C2Ph4)(THF)} and {(Ph2C5H3)LuCl2(THF)3}

The reaction of LuCl₃(THF)₃ with Na(1,3-Ph₂C₅H₃) followed by the in situ reaction with Na₂[Ph₄C₂] produced (1,3-Ph₂C₅H₃)Lu(Ph₄C₂)(THF) (1). The structure of 1 was established by X-ray diffraction. In the crystal structure of 1, the bis-allyl η⁶-coordination of the tetraphenylethylene dianion to the lutetium cation was observed. The structures of (1,3-Ph₂C₅H₃)LuCl₂(THF)₃ and (C₅H₅)LuCl₂(THF)₃ were determined by X-ray diffraction. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1912–1918, October, 2007.     

Elastic scattering of light alpha-cluster nuclei by <Superscript>12</Superscript>C nuclei

The differential cross sections for the elastic scattering of ¹²C and ¹⁶O nuclei by ¹²C nuclei are calculated on the basis of the theory of multiple diffractive scattering and the dispersive alpha-cluster model. The calculations were performed by using either an effective or a free αα amplitude. It is shown that the results obtained in these two cases are noticeably different.     

Elastic scattering of intermediate-energy weakly bound particles on 12C nuclei

The differential cross-section for elastic scattering of deuterons at 700 MeV, ⁶Li and ⁶He at 2.07 GeV nuclei on ¹²C nucleus is calculated under the assumption of two-cluster (for deuterons and ⁶Li) and three-cluster (for ⁶He) structure of incident particle. For ⁶Li-¹²C and ⁶He-¹²C elastic scattering it is shown that there are quantitative distinctions in the behaviour of the observables calculated in the above approaches. Received: 13 October 1999 / Accepted: 3 January 2001     

Intermediate energy elastic scattering of protons on 24Mg in the $ \alpha$ -cluster model with dispersion

The -cluster model with dispersion has been developed for the case of the ²⁴Mg nucleus. The ²⁴Mg nucleus is considered as composed of the core ( ¹⁶O nucleus) and two -clusters that form a dumbbell configuration and are arranged with the most probability inside the core. In the calculations the -cluster structure of the core has been taken into account. On the basis of the multiple diffraction scattering theory the differential cross-section and the polarization observables for the elastic p - ²⁴Mg scattering at 800 and 250MeV have been calculated. The results obtained are in agreement with the existing experimental data.     

Characterization of the sets of discontinuity points of separately continuous functions of many variables on the products of metrizable spaces

We show that a subset of the product ofn metrizable spaces is the set of discontinuity points of some separately continuous function if and only if this subset can be represented in the form of the union of a sequence ofF _σ-sets each, of which is locally projectively a set of the first category. Chernovsty University, Chernovtsy. Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 52, No. 6, pp. 740–747, June, 2000.