Zobrazeno 1 - 10
of 14
pro vyhledávání: '"V. A. Svyatkin"'
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 34:964-970
1. The method of molecular mechanics in the MM/2 parametrization accurately describes a large set of thermochemical, structural, and electronic characteristics of highly stressed bicyclo[n.1.0]alkanes (BCA's) with n=1 to 4. 2. The reliability of the
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 34:114-123
1. Using the method of molecular mechanics in the MM/2 parametrization, 20 hydrocarbons of the alkylcyclopropane series were calculated. The satisfactory reproduction of the experimental thermochemical properties was demonstrated on the example of se
Molecular-mechanical analysis of the structure of strained organic molecules. 6. [m.n.k]-Propellanes
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 37:1827-1836
1. The structures of 20 propellanes, containing all possible combinations of three-, four-, five-, and six-carbon rings were calculated by the MM/2 method. An assessment of their strains was made by means of homodesmotic reactions with partial and co
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 37:69-75
1. According to the molecular mechanical method, MM/2, the trans isomers of bicyclo [4.1.0]heptane and bicyclo[3.1.0]hexane are destabilized by 10–30 kcal/mole relative to the respective cis bicycles, whereas bicyclo[2.1.0]pentane lacks the minimum
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 35:533-542
1. The geometric structure and thermochemistry of linear and branched saturated acyclic hydrocarbons are accurately described with the aid of molecular mechanics in the MM/2 parametrization, while the semiempirical quantum-chemical methods are less e
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 36:727-733
1. Molecular mechanics in the MM/2 parametrization and quantum-chemical calculations with the geometry optimized by molecular mechanics accurately describe the thermochemistry, geometric structure, and electronic structure of spiro hydrocarbons conta
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 31:37-41
The principle of optimal deformations establishes relations which must apply between alterations in bond lengths and valence angles in planar cyclic molecules; they can be used to describe the changes in three-membered ring geometry resulting from th
Autor:
A. I. Lutsenko, V. A. Svyatkin, V. V. Samoshin, G. I. Nikishin, E. I. Troyanskii, V. V. Mizintsev
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 38:294-300
1. During the oxidative cyanation of 2-, 3-, and 4-methylcyclohexanones in the Na2S2O8-NaCN system the corresponding 4-cyano(methyl)cyclohexanones are formed regiospecifically. 2. The oxidative cyanation of 2- and 3-methylcyclohexanones takes place d
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 26:2072-2078
A study has been made of the isotopic structures of theν 1 andν 3 IR absorption bands of dichlorocarbene and dichlorosilylene, each stabilized in an Ar matrix at 15–20°K. A determination has been made of the valence angles, force constants, and
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 34:1445-1456
1. The complex use of the MM/2 molecular mechanics method and quantum chemical calculations was proposed for the description of the structural and thermochemical characteristics of bicyclo [1.1.0]butane and its polycyclic derivatives, which have not