Premium
Regioselective H/D Exchange at the Side‐Chain of Ethylbenzene on Dealuminated Zeolite H‐Y Studied by In Situ MAS NMR–UV/Vis Spectroscopy
Author(s) -
Huang Jun,
Jiang Yijiao,
Marthala V. R. Reddy,
Ooi Yean Sang,
Hunger Michael
Publication year - 2008
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200800065
Subject(s) - chemistry , ethylbenzene , regioselectivity , carbenium ion , zeolite , protonation , ion exchange , hydride , nuclear magnetic resonance spectroscopy , markovnikov's rule , side chain , medicinal chemistry , photochemistry , ion , organic chemistry , catalysis , hydrogen , polymer
Regioselective H/D exchange at the side‐chain methyl group of ethylbenzene on dealuminated zeolite H‐Y and formation of carbenium ions are observed for the first time by the novel in situ pulsed‐flow 1 H MAS NMR‐UV/Vis technique. Hydride abstraction on Lewis acid sites lead to the formation carbenium ions which are protonated following Markovnikov's rule (see scheme).