An increment system for deuterium isotope effects on13C chemical shifts of methylated benzenes
作者:Stefan Berger、Bernd W. K. Diehl
DOI:10.1002/mrc.1260241210
日期:1986.12
The complete series of all possible benzenes bearing one deuterium atom and one to five methyl groups was synthesized. The deuteriumisotopeeffects on the carbon chemicalshifts of the aromatic and aliphatic carbon atoms were measured and shown to obey an empirical increment system. The isotopeeffects over one bond correlate with the C,H spin coupling constants.
Kinetics and mechanism of aromatic thallation. Identification and proof of competing electrophilic and electron-transfer pathways
作者:W. Lau、J. K. Kochi
DOI:10.1021/ja00335a039
日期:1984.11
Etude des reactions de divers polymethylbenzenes avec le tris-trifluoroacetate de thallium dans l'acide trifluoroacetique
多甲基苯三氟乙酸盐三氟乙酸铊反应练习曲
Arene activation with mercury(II) and thallium(III) electrophiles. Mechanistic relevance of charge-transfer transitions in .pi.-complexes as intermediates
作者:W. Lau、Jay K. Kochi
DOI:10.1021/ja00281a043
日期:1986.10
The activation of various aromatic hydrocarbons by mercuration and thallation proceeds via ..pi..-complexes, as observed by the transient charge-transfer (CT) absorption spectra. Quantitative spectrophotometric analysis of (a) the association constants K and 9b) the second-order rate constants k/sub2/ establishes the reactive forms of the electrophiles to be Hg(O/sub 2/CCF/sub3/)/sub2/ and Tl(O/sub