Kazan state Federal University E-Archive :: Browsing by Author "Vul'fson S."

Anisotropy of polarizability of the silatranes

Samarina O.; Vereshchagin A.; Ishmaeva E.; Vul'fson S.; D'yakov V.; Baryshok V.; Voronkov M.; Pudovik A. (1977)

1. Polarizability parameters have been determined for the Si-C and Si-O bonds. The Si-O bond of the siloxanes does not show axial symmetry. 2. The axes of the molecular polarizability ellipsoid for 1-methylsilatrane have ...

Anisotropy of the polarizability and intramolecular interaction in para-substituted dimethylanilines

Cheryukanova G.; Vul'fson S.; Chmutova G.; Vereshchagin A. (1974)

1. The parameters of the ellipsoids of polarizability of the conjugated fragments N-C6H4-El in the molecules of para-substituted dimethylanilines were determined. 2. The introduction of donor substituents into the para-position ...

Anisotropy of the polarizability and steric structure of arylvinyl selenides and arylvinyl sulfides

Vul'fson S.; Teitel'baum A.; Mannafov T.; Vereshchagin A. (1976)

1. Molecules of arylvinyl selenides have a maximally conjugated planar s-trans structure, 2. The conformations of arylvinyl sulfides are determined by the ratio of the energies of conjugation and steric repulsion of atoms; ...

Calculating the influence of substituents upon the dissociation constants of carboxylic acids

Vereshchagin A.; Vul'fson S. (1967)

1. A general formula was proposed for calculating the dissociation constants of substituted acids, considering all the electrostatic interactions in dissociated and nondissociated forms of substituted and unsubstituted ...

Composition, properties, and structure of palladium(II) chlorides in aqueous solution

Vul'fson S.; Glebov A.; Nagaitseva I.; Tarasov O.; Sal'nikov Y.; Vereshchagin A. (1990)

The composition, stability, and structure of palladium(II) chloride complexes in hydrochloric acid media have been determined using nuclear-magnetic relaxation, magnetochemical methods, and Rayleigh light scattering. The ...

Composition, stability, and paramagnetic birefringence of d- and dl-terbium(III) tartrates

Bezryadin S.; Chevela V.; Sal'nikov Y.; Savitskaya T.; Kolesar I.; Shamov G.; Vul'fson S. (1997)

The formation of d- and dl-terbium(III) tartrates was studied by pH-metry and paramagnetic birefringence in combination with mathematical simulation. The paramagnetic birefringence constants were calculated. Paramagnetic ...

Composition, structure, and anisotropy of magnetic properties of d- and dℝ-tartrates of Dy3+ from proton magnetic relaxation and magnetic birefringence data

Vul'fson S.; Chevela V.; Sal'nikov Y.; Matveev S.; Vereshchagin A. (1990)

We have determined the composition and stability of d- and dℝ-tartrates of Dy3+. In the pH region 4.0-7.0, we have shown that binuclear particles are formed. The relative stability of isomeric d- and dℝ-tartrates of Dy3+ ...

Configurations and conformations of the α- and β-thiooxides of Δ3-carene

Samitov Y.; Nuretdinova O.; Vul'fson S.; Timosheva A.; Arbuzov B. (1976)

1. Analysis of1H NMR spectra has shown that the thiooxide obtained from the α-oxide of Δ3-carene has the two three-membered rings in the cis-configuration, while the thiooxide obtained from the β-oxide is a trans-isomer. ...

Conformation of compounds with two geminal halomethyl groups

Vereshchagin A.; Timosheva A.; Vul'fson S.; Remizov A.; Arbuzov B. (1973)

1. According to the data of the dipole moments, Kerr effects, light scattering, and IR spectra, 1,3-dihalopropanes symmetrically substituted in the 2-position are represented in CCl4 by conformers with trans-gauche and ...

Conformation of unsymmetrical diaryl disulfides

Sorokina L.; Vul'fson S.; Kataeva L.; Vereshchagin A.; Kataev E.; Vinokurova R. (1977)

1. In solution the unsymmetrical p-substituted diaryl disulfides have a skewed conformation with a dihedral angle of ∼80°. 2. The angles of rotation of the aryl fragments relative to the planes of the Car-S-S bonds in the ...

Conformations of cyclic bromoarsenites and the electrical parameters of arsenic bonds

Anonimova I.; Chadaeva N.; Yuldasheva L.; Vul'fson S.; Vereshchagin A.; Arbuzov B. (1976)

1. It has been shown that 2-bromo-l,3,2-dioxaarsenanes exist in chair conformation with axially oriented As-Br bonds. 2. Polarity and polarizability parameters have been found for the As-O and As-Br bonds in 2-bromo-l,3, ...

Dimeric d- and dl-dysprosium(iii) tartrates: paramagnetic birefringence, molecular mechanics, stereoselectivity

Chevela V.; Vul'fson S.; Matveev S.; Salnikov Y.; Semyonov V.; Bezryadin S. (1994)

The molar constants of paramagnetic birefringence (PBR) for the dimeric dysprosium(iii)d- and dl-tartrates, Dy2(d-Tart)(l-Tart)2- (1) and Dy2(d-Tart)2 2- (2) have been determined by means of pH-metric and PBR measurements. ...

Dipole moments and structure of adducts of methacrylonitrile with some cyclic dienes

Arbuzov B.; Vereshchagin A.; Vul'fson S. (1965)

1. Some adducts of methacrylonitrile with cyclic dienes were synthesized. 2. The dipole moments of six adducts were measured and some conclusions regarding their structure were drawn. © 1965 Consultants Bureau Enterprises Inc.

Dipole moments, molar Kerr constants, and structure of epoxy derivatives of terpinolene

Arbuzov B.; Arshinova R.; Vul'fson S.; Andreeva I.; Vereshchagin A. (1970)

1. The primary oxidation of terpinolene at the semicyclic double bond was confirmed, and it was shown that the dioxide has a trans-structure. 2. Terpinolene monoxide exists in solution in the form of a mixture of two ...

Electronic and steric interactions in molecules of some aromatic dimethylamino derivatives

Vul'fson S.; Cheryukanova G.; Chmutova G. (1975)

1. The additive scheme is applicable to calculating the Kerr constant and dipole moment of m-nitrodimethylaniline. 2. For 4-nitro-2-dimethylamlnotoluene the rotation of the (CH3)2N group relative to the {Mathematical ...

Geometrical structures of the gem-dichlorocyclopropyl aryl selenides

Kamalyutdinova-Salikhova A.; Mannafov T.; Khismatova R.; Vul'fson S.; Vereshchagin A. (1979)

1. The para-substituted gem-dichloropropyl aryl selenides have been synthesized, for the first time, and studied through their13C NMR spectra and their dipole moments and Kerr constants. 2. These compounds exist as gauche ...

Inductive interaction of weak dipoles in unsaturated and aromatic hydrocarbons and their derivatives

Vereshchagin A.; Vul'fson S.; Arshinova R. (1967)

1. Calculation of induction according to the field effect mechanism is applicable to compounds containing differently hybridized carbon atoms. 2. The "zero" moments of the bonds Csp 3-Csp 2, Csp 3-Csp, and Csp 2-Csp were ...

Investigation of the three-dimensional structure of Δ4-carene and its oxide

Arbuzov B.; Vil'chinskaya A.; Samitov Y.; Vul'fson S.; Vereshchagin A. (1969)

1. The PMR spectra, dipole moments and molar Kerr constants of Δ4-carene and its oxide were studied. 2. A trans-structure of Δ4-carene oxide was confirmed, and the conformations of the molecules of the investigated compounds ...

Kerr constants and conformations of certain arylmethylsulfones

Vereshschagin A.; Bautina I.; Chmutova G.; Vul'fson S. (1976)

Kerr constants and spatial structures of certain aryl vinyl compounds of sulfur

Mannafov T.; Vul'fson S.; Arkhireeva I.; Vereshchagin A. (1977)

1. The aryl group is rotated by an angle of 65-75° with respect to the C-S-C plane in the aryl vinyl sulfones and their β-chloroderivatives containing H, CH3, CL, and Br substituents; in nitrophenyl vinyl sulfone, the ...

Browsing by Author "Vul'fson S."

Browsing by Author "Vul'fson S."

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