η 4‐Complexes of 4,7‐Dihydroacepentalene
Facile Degenerate Haptotropic Rearrangement of (η5‐Cyclopentadienyl)(η4‐4,7‐dihydroacepentalene)cobalt(I) in Contrast to its Tricarbonyliron Counterpart
- authored by
- Günter Schröder, Holger Butenschön, Roland Boese, Tomas Lendvai, Armin De Meijere
- Abstract
The (cyclopentadienyl)cobalt(I) complex 4 of the 4,7‐dihydroacepentalene derivative 2b has been prepared by the reaction of the ligand with (cyclopentadienyl)bis(ethene)cobalt(I). NOE experiments indicate a complexation at the convex face of the polyolefinic ligand. 1H‐NMR spectra establish a degenerate haptotropic rearrangement with CpCo migration from one diene unit to the adjacent one. The activation energy of this process is estimated to be 15 kcal/mol. An X‐ray crystal structure determination of (η4‐4,7‐dihydroacepentalene)tricarbonyliron derivative 3a shows a distorted coordination of Fe(CO)3 at the convex face of the ligand, too.
- External Organisation(s)
-
Max-Planck-Institut für Kohlenforschung
University of Duisburg-Essen
Universität Hamburg
- Type
- Article
- Journal
- Chemische Berichte
- Volume
- 124
- Pages
- 2423-2427
- No. of pages
- 5
- ISSN
- 0009-2940
- Publication date
- 11.1991
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Chemistry
- Electronic version(s)
-
https://doi.org/10.1002/cber.19911241108 (Access:
Unknown)
