Zobrazeno 1 - 10
of 97
pro vyhledávání: '"R. P. Arshinova"'
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 23
An analysis of conformational features of six-membered ring systems of the type of 1,3,5-diheterophosphorinanes with tri-and tetracoordinated phosphorus is given. Using IR, NMR spectra, dipole moments, as well as molecular mechanic calculation it was
Publikováno v:
ChemInform. 25
Publikováno v:
Bulletin of the Russian Academy of Sciences Division of Chemical Science. 41:478-481
An additive system of polarities in 12H-dibenzo(dinaphtho)[d,g][1,3]dioxocins is proposed, and alkyl—oxygen and phenyl—oxygen group dipole moments in these compounds were determined. The stereospecific relation of the polarity of the Csp2-O bond
Autor:
R. P. Arshinova, I. V. Anonimova, I. A. Litvinov, I. Khainike, R. A. Kadyrov, Olga N. Kataeva, V. A. Naumov
Publikováno v:
Bulletin of the Russian Academy of Sciences Division of Chemical Science. 41:248-253
An x-ray structural investigation of the synthesized title compounds (1) and (2) has been performed. The heterocycle of 1 has a boat-chair conformation with the P2=O2 bond in the axial position. The heterocycle of 2 has a distorted-boat conformation
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 65:119-122
An analysis of conformational features of six-membered ring systems of the type of 1,3,5-diheterophosphorinanes with tri-and tetracoordinated phosphorus is given. Using IR, NMR spectra, dipole moments, as well as molecular mechanic calculation it was
Publikováno v:
Journal of Structural Chemistry. 32:661-665
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 40:1338-1343
1H NMR spectroscopy, measurements of dipole moments, and the Kerr effect have been used to study the conformational structure in solutions of 3-X-3-oxo-6,7-benzo-1,5,3-dioxaphosphepines (X=Me, Et, Ph, Cl, NEt2, OEt, OPh). On the basis of x-ray diffra
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 40:921-926
2-Phenyl-2-oxo-5,6-benzo-1,3,2-dioxaphosphepine exists in a melt and solutions in polar solvents as a three-component equilibrium of two chair forms (C) with axial and equatorial arrangement of the phenyl group and the twist-boat form (TB) with a pse
Publikováno v:
Journal of Molecular Structure. 245:165-172
Two of the four possible dibenzo [d,g][1,3]dioxocin-12-one conformers are identified in solution from IR and Raman spectra. The experimental enthalpy difference between boat—chair ( BC ) and twist T ) conformers of 0.7 kcal mol − is obtained from