NMR-STUDY OF NUCLEAR-SPIN POLARIZATION DURING CHEMICAL-REACTIONS WITH ORTHO HYDROGEN

被引:25
作者
BARGON, J
KANDELS, J
WOELK, K
机构
[1] Institut für Physikalische Chemie, Universität Bonn, D-5300
来源
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1990年 / 29卷 / 01期
关键词
D O I
10.1002/anie.199000581
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Polarization signals in NMR spectra do not necessarily point to reactions via radicals. This is confirmed by hydrogenations (a) with enriched ortho and para hydrogen, in which polarization signals were observed in each case, albeit with different intensity and reversed sequence of emission and absorption. The intensity ratio can be correlated with the ratio of the ortho and para hydrogen, and thus it is unequivocally confirmed that the nuclear spin states of the H2 molecules are responsible for the non‐equilibrium occupation of the product nuclear spin level. (Formula Presented.) Copyright © 1990 by VCH Verlagsgesellschaft mbH, Germany
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页码:58 / 59
页数:2
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