Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Taťjana Nevěčná"'
Publikováno v:
Materials Chemistry and Physics. 111:77-81
Surfactants represent not only commonly used wetting agents but also substances that can be used as growth modifiers in the process of solid nanoparticle (NP) preparation. In this study we report influential character of different types of surfactant
Publikováno v:
International Journal of Molecular Sciences, Vol 6, Iss 1, Pp 30-44 (2005)
International Journal of Molecular Sciences
Volume 6
Issue 1
Pages 30-44
International Journal of Molecular Sciences
Volume 6
Issue 1
Pages 30-44
Nine α-alkylstyrenes carrying the following substituents have been synthesised: methyl, ethyl, propyl, butyl, pentyl, isobutyl, isopropyl, sec-butyl and tert-butyl. Kinetics has been measured for the reaction of these compounds with mercuric a
Publikováno v:
Collection of Czechoslovak Chemical Communications. 66:1638-1658
The log I values of 15 mainly ortho substituted derivatives of aniline and N-methylaniline have been measured spectrophotometrically in sulfuric, perchloric, and methanesulfonic acids. A new algorithm has been suggested for construction of acidity fu
Publikováno v:
Collection of Czechoslovak Chemical Communications. 64:1253-1261
Four 2,6-disubstituted anilines with CH3, Cl, and NO2 substituents have been synthesized and, together with four commercial substances of the same type, subjected to spectrophotometry to find the concentration ratios of the protonated and non-protona
Publikováno v:
Collection of Czechoslovak Chemical Communications. 60:251-256
1H NMR spectra have been measured of seven 3,5-disubstituted 6-oxo-1,6-dihydro-1,2,4-triazines, and tautomerism of these compounds has been evaluated in connection with the nature of substituents, medium, and temperature. The title compounds exist in
Autor:
Taťjana Nevěčná, Oldřich Pytela
Publikováno v:
Collection of Czechoslovak Chemical Communications. 59:2029-2041
The kinetics of decomposition of 1,3-bis(4-methylphenyl)triazene catalyzed with 13 substituted benzoic acids of various concentrations have been measured in 25 vol.% aqueous methanol at 25.0 °C. The rate constants observed (297 data) have be used as
Publikováno v:
Collection of Czechoslovak Chemical Communications. 59:1384-1391
The rate constants of reaction of triethylamine with ethyl bromide have been measured in 13 solvents at the temperatures of 293, 313, 333, and 373 K. The activation entropies in the individual solvents increase when going from nonpolar to dipolar apr
Publikováno v:
Collection of Czechoslovak Chemical Communications. 55:2701-2706
The effect of concentration of benzoic acid and composition of the binary solvent water-methanol on the rate of decomposition of 1,3-bis(4-methylphenyl)triazene has been studied. It has been found that both general acid catalysis by undissociated ben
Publikováno v:
Collection of Czechoslovak Chemical Communications. 55:156-164
The effect of aprotic solvents (hexane, cyclohexane, dichloromethane, 1,2-dichloroethane, benzene, acetonitrile, acetone, 1,2-dimethoxyethane, ethyl acetate, dioxane) on kinetics and mechanism of acid-catalyzed decomposition of 1,3-bis(4-methylphenyl
Publikováno v:
Collection of Czechoslovak Chemical Communications. 55:147-155
The effect of protic solvents (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, cyclohexanol) has been studied on the kinetics and mechanism of acid-catalyzed decomposition of 1,3-bis(4-methylphenyl)triazene, using trichloroacetic aci