Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Bruce E. Smart"'
Publikováno v:
Journal of Fluorine Chemistry. 125:1543-1552
Quadricyclane (1) readily undergoes [2+2+2] cycloaddition reactions with electron-deficient fluorinated carbonyl compounds to give polyfluorinated 3-oxatricyclo[4.2.1.02,5]non-7-enes in high yields. Hexfluoroacetone, trifluoroacetyl chloride, methyl
Autor:
Robert L. Waterland, Robert Clayton Wheland, Andrew Edward Feiring, Amy M. Rinehart, Bruce E. Smart, Kerwin D. Dobbs
Publikováno v:
Journal of Fluorine Chemistry. 122:37-46
In its continuing quest for smaller length scales, the electronics industry plans to introduce 157 nm as the next lithographic wavelength. Accordingly, there is a pressing need to develop photoresists that are more transparent, and pellicles that are
Publikováno v:
Journal of Fluorine Chemistry. 117:199-205
The synthesis of 1-vinyl-1,2,2,3,3-pentafluorocyclopropane ( 1 ) and the kinetics of its thermal, unimolecular rearrangement to 1,4,4,5,5-pentafluorocyclopentene ( 2 ) are reported. Kinetic data were obtained by gas-phase 19 F NMR at 80–120 °C, an
Publikováno v:
The Journal of Organic Chemistry. 67:3464-3467
Gas-phase (1)H NMR analysis has been applied to investigate the kinetics of the unimolecular rearrangement of 2,2-dichloro-1-methylenecyclopropane (1) to (dichloromethylene)cyclopropane (2) [k(1) = 7.9 x 10(12) exp(-34.4 +/- 0.6 kcal mol(-1)/RT)], as
Publikováno v:
Journal of Fluorine Chemistry. 114:107-111
Fluorine substituent effects on the structure of oxirane and on the kinetic behavior of oxiranylcarbinyl radicals, as determined by DFT calculations, have been found to be similar to those observed for the analogous fluorinated cyclopropylcarbinyl ra
Publikováno v:
Journal of the American Chemical Society. 123:9956-9962
A gas-phase NMR kinetic technique has been used for the first time to obtain accurate measurements of rate constants of some bimolecular, second-order cycloaddition reactions. As a test of the potential use of this technique for the study of second-o
Autor:
Bruce E. Smart
Publikováno v:
Journal of Fluorine Chemistry. 109:3-11
The characteristic effects of fluorine and fluoroalkyl substituents on the physico-chemical properties of molecules that are important to biological activity of fluorinated compounds are highlighted. The influence of fluorination on acidity, hydrogen
Publikováno v:
Journal of the American Chemical Society. 121:7335-7341
Using competition kinetic methodology, absolute rate constants for bimolecular hydrogen abstraction from a variety of organic substrates in solution have been obtained for the n-C4H9CF2CF2•, n-C4F9...
Publikováno v:
Journal of the American Chemical Society. 121:2110-2114
A new competitive kinetic method to obtain the relative rates of intramolecular hydrogen abstraction versus intermolecular deuterium abstraction has been developed and used to measure the rates of the relatively slow unimolecular 1,5-hydrogen abstrac
Publikováno v:
Israel Journal of Chemistry. 39:117-123
Gas-phase NMR complemented with a high-temperature probe makes possible quantitative kinetic studies of homogeneous vapor-phase reactions with unprecedented ease, as demonstrated with a study of the thermal fragmentation of hexafluoropropylene oxide.