نتایج جستجو برای: hammett equation

تعداد نتایج: 230073  

Journal: :Journal of Chemical Education 1940

Journal: :Journal of Chemical Education 1971

2013
Stephen T Hammett Jonas Larsson

1 in multiple regions of human visual cortex revealed by multivariate pattern 2 classification analysis 3 4 5 Stephen T Hammett 6 Andrew T Smith 7 Matthew B Wall 8 Jonas Larsson 9 10 11 Dept of Psychology, 12 Royal Holloway University of London, 13 Surrey TW20 0EX UK. 14 15 16 Running Head: Motion and luminance encoding in human visual cortex 17 18 19 20 21 22 Corresponding author: Steve Hammet...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1983
L T Burka T M Plucinski T L Macdonald

The monohydroxylation of halobenzenes by phenobarbital-induced rat liver microsomes was studied. The p-halophenol was found to be the major metabolite from all four halobenzenes; o-halophenol formation decreased as the halogen atom size increased. Vmax for total hydroxylation (ortho and para products) correlated well with the sigma + Hammett constant with a negative rho value. This implies a po...

Journal: :journal of physical & theoretical chemistry 2009
s. r. emamian m. r. zardoost k. zare e. zahedi h. aghaie

in order to find the susceptibility of the claisen rearrangement and next proton shift reaction of ally) aryl etherto the substiment effects in pan position, the kinetic and the:rmodynamie parameters are calculated at the33 ltp level using 6-3110. b asis set. the calculated activation energies for the rearrangements and protonshift reactions are around 3133 kcaumol and 52.16 kcal/mol, nap.. liv...

Journal: :Organic & biomolecular chemistry 2013
Jürgen Rotzler Heiko Gsellinger Angela Bihlmeier Markus Gantenbein David Vonlanthen Daniel Häussinger Wim Klopper Marcel Mayor

The influence of electron donors and electron acceptors of variable strength in the 4 and 4' position of 2 and 2' propyl-bridged axial chiral biphenyl cyclophanes on their atropisomerization process was studied. Estimated free energies ΔG(‡)(T) of the rotation around the central biphenyl bond which were obtained from (1)H-NMR coalescence measurements were correlated to the Hammett parameters σ(...

Journal: :Journal of the American Chemical Society 2006
Bryan K Spraul S Suresh Jianyong Jin Dennis W Smith

A series of 19 p-substituted aromatic trifluorovinyl ether compounds were prepared from versatile intermediate p-Br-C(6)H(4)-O-CF=CF(2) and underwent thermal radical mediated cyclodimerization to new difunctional compounds containing the 1,2-disubstituted perfluorocyclobutyl (PFCB) linkage. The synthetic scope demonstrates the functional group transformation tolerance of the fluorovinyl ether, ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید