Zobrazeno 1 - 10
of 30
pro vyhledávání: '"K. T. Leffek"'
Publikováno v:
ChemInform. 23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b74cbba80916dd8a00ea52b4431626a
https://doi.org/10.1002/chin.199243106
https://doi.org/10.1002/chin.199243106
Autor:
K. T. Leffek, E. C. F. Ko
Publikováno v:
Canadian Journal of Chemistry. 50:1297-1302
First order rate constants and activation parameters are reported for the decomposition in chloroform and acetone solvents of a series of 4-substituted-benzylphenyldimethylammonium bromides and iodides and also of a series of tetra-alkylammonium brom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::516d6a52233d7ae1fbc4e9254c88efb5
https://doi.org/10.1139/v72-203
https://doi.org/10.1139/v72-203
Autor:
E. C. F. Ko, K. T. Leffek
Publikováno v:
Canadian Journal of Chemistry. 49:129-132
The secondary deuterium isotope effect is reported for the decomposition of benzyl-α-d2-phenyldimethylammonium bromide in both chloroform and acetone solvent, over a temperature range of 25 to 30°. The magnitudes of the rate ratios are compared to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7515abd2557d62da4db4cd63bc06f8b
https://doi.org/10.1139/v71-019
https://doi.org/10.1139/v71-019
Autor:
K. T. Leffek, F. H.-C. Tsao
Publikováno v:
Canadian Journal of Chemistry. 46:1215-1220
The loss of optical activity from phenylbenzylmethylallylammonium iodide in chloroform solution has been found to be entirely due to decomposition; racemization as such does not take place. The products are benzyl iodide and allylmethylaniline. A mec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7abb66da6a3cac599efdcf937d0da39c
https://doi.org/10.1139/v68-206
https://doi.org/10.1139/v68-206
Autor:
K. T. Leffek, Eleanor L. Kulin
Publikováno v:
Canadian Journal of Chemistry. 51:687-693
The kinetics of the ethanolysis of three triphenylmethyl chlorides, the 4-nitro, 4,4′-dinitro, and 4,4′,4″-trinitrophenylmethyl compounds, have been studied. The effect of change in substrate and solvent composition on the activation parameters
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0eda8eecfe151d712f5ddd617b4e546
https://doi.org/10.1139/v73-104
https://doi.org/10.1139/v73-104
Publikováno v:
Canadian Journal of Chemistry. 38:1505-1510
As an extension of previous work on methyl compounds, α-deuterium kinetic effects have been measured for ethyl, n-propyl, and isopropyl compounds. The effects can be accounted for in terms of current theory but a modification involving intramolecula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17c7d957dd944c1723c5c1546bf2fc52
https://doi.org/10.1139/v60-210
https://doi.org/10.1139/v60-210
Autor:
C. Heitner, K. T. Leffek
Publikováno v:
Canadian Journal of Chemistry. 44:2567-2570
not available
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e20430cbfdf9cebe9dc6a2c095d3a11
https://doi.org/10.1139/v66-384
https://doi.org/10.1139/v66-384
Publikováno v:
Canadian Journal of Chemistry. 39:1989-1994
The secondary β-deuterium isotope effect (kH/kD) has been measured over a range of temperature for the water solvolysis reactions of isopropyl methanesulphonate, p-toluenesulphonate, and bromide. In these cases the isotope effect is due to a differe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0146c88d64e3a1a99b8ee00d8d43ea9c
https://doi.org/10.1139/v61-268
https://doi.org/10.1139/v61-268
Autor:
K. T. Leffek
Publikováno v:
Canadian Journal of Chemistry. 48:1-6
The kinetic form of the suppression of the perchlorate catalysis of the methanolysis of triphenylmethyl chloride in benzene solvent by tetra-n-butylammonium chloride has been investigated. This is consistent with a catalysis brought about by a simple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d023ed56ab7328c069064be27f993e3
https://doi.org/10.1139/v70-001
https://doi.org/10.1139/v70-001
Autor:
K. T. Leffek, A. Jarczewski
Publikováno v:
Canadian Journal of Chemistry. 50:24-30
The second-order rate constants have been measured over a range of temperatures for the proton-transter reactions from di-(4-nitrophenyl)methane to ethoxide, isopropoxide, and t-butoxide ions in solvents consisting of the corresponding alcohols conta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44957cd8cf0f18df9ad4997d472cf2b2
https://doi.org/10.1139/v72-004
https://doi.org/10.1139/v72-004