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Alkyne Complexes of Rhenium in Intermediate Oxidation States; Synthesis and Molecular Structure of a Rhenium( V )‐Allenylidene Complex
Author(s) -
Herrmann Wolfgang A.,
Fischer Roland A.,
Herdtweck Eberhardf
Publication year - 1987
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.198712631
Subject(s) - alkyne , rhenium , ligand (biochemistry) , chemistry , carbene , olefin fiber , stereochemistry , medicinal chemistry , catalysis , organic chemistry , receptor , biochemistry
The Re IV complex 1 undergoes disproportion upon reaction with 2‐butyne to give the allylidene‐Re V complex 2 and the alkyne‐Re III complex 3. According to an X‐ray structure analysis 2 does not have a metallacyclobu‐tene structure; rather, the C 4 ligand is bound in a carbene/olefin fashion. Reaction of 3 with AgSbF 6 in the presence of alkynes leads to bis(π‐alkyne) complexes, which are of interest as model compounds for intermediates of oxidative alkyne coupling.