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Coupling of an N‐Heterocyclic Carbene on Iron with Alkynes to Form η 5 ‐Cyclopentadienyl‐Diimine Ligands
Author(s) -
Hatanaka Tsubasa,
Ohki Yasuhiro,
Tatsumi Kazuyuki
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201309021
Subject(s) - carbene , diimine , phenylacetylene , chemistry , ring (chemistry) , cyclopentadienyl complex , ligand (biochemistry) , imidazole , photochemistry , stereochemistry , organic chemistry , catalysis , biochemistry , receptor
A cyclometalated N‐heterocyclic carbene ligand in a half‐sandwich iron complex was found to couple with alkynes, leading to a unique type of ring opening of the carbene ligand and the formation of ferrocenyl–diimine complexes. An intermediary iron complex obtained from the reaction with phenylacetylene reveals that the ring opening follows the formation of a fused heterocycle consisting of an imidazole ring and two alkynes.