Results 131 to 140 of about 57,191 (159)

Stereodirective Effects in Mixed Substituent Vinyloxycyclotriphosphazenes

Inorganic Chemistry, 2009
Reaction pathways leading to the new mixed substituent cyclophosphazenes, N(3)P(3)Cl(4)(OCH=CH(2))(OCH(2)CF(3)) and N(3)P(3)Cl(3)(OCH=CH(2))(OCH(2)CF(3))(2), have been explored. Examination of the relative isomeric yields and the spectroscopic properties of these new derivatives gave insight into the mechanism of substitution of cyclophosphazenes with ...
Kenneth R, Carter, Michael, Calichman, Christopher W, Allen   +2 more
openaire   +2 more sources

Substituent effects in anthrasemiquinones

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1988
Electron spin resonance spectra have been obtained from series of 2-substituted anthrasemiquinones and of 3-substituted 1,8-dihydroxyanthra-semiquinones. The proton splittings are consistently assigned by means of linear correlation plots between splitting constants and a substituent-dependent parameter.
openaire   +1 more source

H-Bonding-Assisted Substituent Effect

The Journal of Organic Chemistry, 2010
In this paper we investigate the influence of intramolecular noncovalent interaction, i.e., H-bonding and Li-bonding, on the properties of substituents communicating through the resonance (mesomeric) effect in such molecular systems as salicylaldehyde, o-hydroxy Schiff base, o-nitrosophenol, and their lithium analogues.
Tadeusz M, Krygowski, Joanna E, Zachara-Horeglad, Marcin, Palusiak   +2 more
openaire   +2 more sources

Reaction kinetics of polymer substituents. Neighbouring-substituent effects in single-substituent reactions

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1972
The kinetic behaviour is predicted for a hypothetical polymer reaction in which the reactivity of a substituent (or other reacting entity) depends on whether zero, one or two of its neighbours have already reacted. The problem is not new, but the method of analysis used here gives solutions applicable to reactions of polymer molecules containing a ...
openaire   +1 more source

Substituent effects. X. Improved treatment (FMMF) of substituent effects

Journal of the American Chemical Society, 1971
Michael J. S. Dewar, Ronald Golden, J. Milton Harris   +2 more
openaire   +1 more source

Biological activity and substituent effects

Archives of Biochemistry and Biophysics, 1957
D G, O'SULLIVAN, P W, SADLER
openaire   +2 more sources

Substituent effects. XII. Substituent effects by fluorine-19 NMR

Journal of the American Chemical Society, 1975
W. Adcock, M. J. S. Dewar, R. Golden, M. A. Zeb   +3 more
openaire   +1 more source

Substituent effects on the Claisen rearrangement. The accelerating effect of a 6-donor substituent

Journal of the American Chemical Society, 1984
Dennis P. Curran, Young Ger Suh
openaire   +1 more source

Substituent-Adjusted Electrochromic Behavior of Symmetric Viologens

Materials, 2021
Guangming Chen, , Fanglan Guan
exaly  

SUBSTITUENT EFFECTS*

Transactions of the New York Academy of Sciences, 1967
openaire   +1 more source