Научные публикации в Scopus: Новые поступления

Отображаемые элементы 9241-9260 из 24551

Spatial structure of phosphorus-containing heterocycles. 23. 2-Phenoxy-1,3,2-dioxaphosphorinanes with four-coordinate phosphorus

Arshinova R.; Sorokina T.; Remizov A.; Koroleva G.; Arbuzov B. (1979)

1. The change in the valence state of the phosphorus atom influences the orientation with respect to the P-O(Ph) bond in 2-phenoxy-2-oxo(thiono)-1,3,2-dioxaphosphorinanes. 2. An orthogonal conformation is realized in the ...
Contribution of localized molecular orbitals to the proton magnetic screening constant of PX3 molecules

Aminova R.; Zuev M.; Morozova I. (1979)

1. A calculation of the magnetic screening constants of the protons in the PH3 and P(CH3)3 molecules with the aid of localized molecular orbitals has been carried out for the first time. 2. The contribution to σ from the ...
Conformation of 2,3-caranediols and 3-hydroxy-2-caranones

Arbuzov B.; Isaeva Z.; Povodyreva I.; Ratner V. (1979)

1. The hydroxyl groups in 2β,3α-caranediol occupy diaxial positions, and those in 2α,3β-caranediol occupy diequatorial positions. 2. 2α,3α-Caranediol and 2β,3β-caranediol exist predominantly in forms with an axial tertiary ...
Spatial structure of 2,2-dimethyl-5-alkyl-1,3,2,5-dioxasilaphosphorinanes

Varnavskaya O.; Ishmaeva E.; D'yakov V.; Kudyakov N. (1978)

A study was made of the IR spectra and dipole moments of some heterocycles that simultaneously contain phosphorus and silicon atoms. The preferential conformation of the dioxasilaphosphorinanes is discussed. © 1979 Plenum ...
Study of rotational isomerism in arylmethanesulfonates

Arbuzov B.; Remizov A.; Butenko G.; Vereshchagin A. (1978)

In solution, the arylmethanesulfonates exist as two conformers with the methyl and aryl radicals in gauche and trans configurations. © 1979 Plenum Publishing Corporation.
The effect of substituents at a coordinated center on the strength of P → Sn donor-acceptor bond

Kucheruk L.; Gol'dshtein I.; Kuramshin I.; Gur'yanova E.; Pudovik A. (1978)

1. The thermodynamic parameters for the complexing of SnCl4 and organotin chlorides with organophosphorus donors satisfy the general linear ΔH° vs ΔS° relation applying to donor-acceptor complexes. 2. The energy of the P ...
Reaction of methyl phenylphosphinate with tetracyclone in the presence of bases

Fuzhenkova A.; Galyautdinov N.; Arbuzov B. (1978)

In the presence of amines methyl phenylphosphinate reacts to form products only of 1,6 addition to the conjugated system of tetracyclone. © 1979 Plenum Publishing Corporation.
Reaction of tetracyclone with methyl phenylphosphinate in the presence of catalysts

Fuzhenkova A.; Galyautdinov N.; Arbuzov B. (1978)

1. Methyl phenylphosphinate reacts with tetracyclone in the absence of catalysts according to a scheme involving 1,4 and 1,6 addition of the conjugated cyclone system to form methyl 2,3,4,5-tetraphenyl-4-cyclopenten-1-on ...
Geometrical structures of phosphoruscontaining heterocyclic compounds 19. Polarity and polarizability anisotropy of the phosphorus bonds in 2-hydro-2-oxo-1,3,2-dioxaphosphorinanes

Arshinova R.; Kataev V.; Arbuzov B. (1978)

1. Polarization and polarizability parameters have been determined for phosphoryl bonds in axial and equatorial positions. 2. Components of the polarizability ellipsoid for the P-H bond have been calculated. 3. ...
Reaction of acyl isocyanates with aromatic aldazines

Arbuzov V.; Zobova N.; Rubinova N. (1978)

1. Benzoyl and trichloroacetyl isocyanates react with p-dimethylaminobenzalazine and benzalazine on the type of bis-1,3-dipolar cycloaddition to give substituted triazolo[1,2-a]triazoles. 2. Trifluoroacetyl isocyanate ...
The geometrical structures of phosphorus-containing heterocycles 20. 1,3,2-Dioxaphosphorinanes with two geminal axes of internal rotation

Arbuzov B.; Kataev V.; Arshinova R.; Gubaidullin R. (1978)

1. In solution, 5,5-bis(bromomethyl)-1,3,2-dioxaphosphorinane exists as an equilibrium mixture of conformera with trans-gauche and gauche-gauche orientations of the Br-C-C5-C-Br chain (the first index refers to the equatorial ...
1,3-Dipolar cycloaddition of C-Benzoyl-N-phenyl- and C,N-diphenylnitrones to β-substituted vinylphosphonates

Arbuzov B.; Lisin A.; Dianova E.; Samitov Y. (1978)

1. The 1,3-dipolar cycloaddition of C,N-diphenyl- and C-benzoyl-N-phenylnitrones to diethyl β,β-diacetylvinylphosphonate yields trans-2,3-diphenyl-4-diethoxyphosphono-5-5-diacetylisoxazolidine and trans-2-phenyl-3-benzoy ...
The reaction of stable sulfonium ylides of dimedone with triphenylphosphine

Arbuzov B.; Belkin Y.; Polezhaeva N.; Yudina T. (1977)

1. Triphenylphosphine demethylates 2-(methylphenylsulfuranylidene)-5,5-dimethylcyclohexane-1, 3-dione to form methyltriphenylphosphonium 2-(phenylthio)-5,5-dimethylcyclohexane-1,3-dione (IV). 2. Compound (IV) readily ...
Ionization constants of cyclic derivatives of phosphorus acids in n-propyl alcohol

Ovchinnikov V.; Galkin V.; Cherkasov R.; Pudovik A. (1977)

1. Ionization constants for various types of cyclic phosphorus acids have been determined in abs. n-propanol. The pKa values of these acids are determined by the electronic nature of the dioxyalkylene substituent and the ...
Spatial structures of phosphorus-containing heterocycles - 12. Bond polarities and conformations of the 2-dialkylamino-2-oxo-1,3,2-dioxaphosphorinanes

Arshinova R.; Gubaidullin R. (1977)

1. A determination has been made of the dipole moments of the phosphoryl group in the axial and equatorial chair conformations of 2-dialkylamino-2-oxo-1,3,2 -dioxaphosphorinane. 2. The phosphoryl bond has predominantly ...
Electrochemical reduction of α,β-unsaturated diphosphonium salts on a mercury electrode

Berdnikov E.; Tantasheva F.; Morozov V.; Il'yasov A.; Vafina A. (1977)

1. Study has been made of the electrochemical reduction of the salts of trans-1,2-diphosphonioethene on the dropping Hg electrode in protogenic and aprotic media. 2. It has been shown that stable radical anions result from ...
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 ...
The approximate solution of singular integral equations

Boikov I. (1972)

A computational scheme of collocation type is proposed for a singular linear integral equation with a power singularity in the regular integral and the justification is given. The results obtained are used to justify the ...
Radii of convexity and close-to-convexity of certain integral representations

Avkhadiev F. (1970)

Strict upper bounds are determined for |s(z)|, |Re s(z)|, and |Im s(z) | in the class of functions s(z)=anzn+an+1zn+1+... (n1) regular in |z|<1 and satisfying the condition |u (θ1) -u (θ2) |≤K| θ1-θ2|, where U(θ)=Re s ...
Regulation of Gene Expression for L-Isoaspartyl O-Methyltransferases by Cis-Elements Associated with “Heat-Shock Polytene Chromosome Puffing Formation” in the Anhydrobiotic Midge

Deviatiiarov R.; Shagimardanova E.; Kikawada T. (2017)

© 2016, Springer Science+Business Media New York.L-isoaspartyl O-methyltransferases (PIMTs) are known mostly because of their protein chain reparation activity in plant seeds, but also in many other organisms, from bacteria ...

Отображаемые элементы 9241-9260 из 24551

Поиск в электронном архиве

Расширенный поиск

Просмотр

Весь электронный архив
Раздел

Новые поступления

Научные публикации в Scopus: Новые поступления

Поиск в электронном архиве

Просмотр

Весь электронный архив

Раздел

Моя учетная запись