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mer ‐[Cr(CO) 3 (η 4 ‐norbornadiene)(η 2 ‐ethene)]: A Key Compound in Understanding the Mechanism of the Photocatalytic Diene Hydrogenation with Chromium Carbonyl Complexes
Author(s) -
Chmielewski Dietmar,
Grevels FriedrichWilhelm,
Jacke Jürgen,
Schaffner Kurt
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199113431
Subject(s) - norbornadiene , norbornene , chemistry , catalysis , chromium , photochemistry , metal carbonyl , product distribution , photocatalysis , diene , metal , medicinal chemistry , organic chemistry , polymerization , natural rubber , polymer
The catalytic active species in the photoinduced hydrogenation of norbornadiene (NBD) that leads to nortricyclene and norbornene are the complex fragments fac ‐ and mer ‐[Cr(C0) 3 (η 4 ‐nbd)]. This conclusion is drawn from experiments in the dark with the labile ethene complex 1 as catalyst: the product distribution, pressure dependence, and results from labeling experiments correspond to those found for photoinduced catalysis with [Cr(CO) 4 (η 4 ‐nbd)] as starting complex.