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

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External Research Organisations

  • Max-Planck-Institut für Kohlenforschung
  • University of Duisburg-Essen
  • Universität Hamburg
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Original languageGerman
Pages (from-to)2423-2427
Number of pages5
JournalChemische Berichte
Volume124
Issue number11
Publication statusPublished - Nov 1991
Externally publishedYes

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.

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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. / Schröder, Günter; Butenschön, Holger; Boese, Roland et al.
In: Chemische Berichte, Vol. 124, No. 11, 11.1991, p. 2423-2427.

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title = "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",
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.",
keywords = "4,7‐dihydro, Acepentalene, Cobalt complexes, complexes, Degenerate haptotropic rearrangement, Iron complexes",
author = "G{\"u}nter Schr{\"o}der and Holger Butensch{\"o}n and Roland Boese and Tomas Lendvai and Meijere, {Armin De}",
year = "1991",
month = nov,
doi = "10.1002/cber.19911241108",
language = "Deutsch",
volume = "124",
pages = "2423--2427",
journal = "Chemische Berichte",
issn = "0009-2940",
publisher = "Wiley-VCH Verlag",
number = "11",

}

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TY - JOUR

T1 - η 4‐Complexes of 4,7‐Dihydroacepentalene

T2 - Facile Degenerate Haptotropic Rearrangement of (η5‐Cyclopentadienyl)(η4‐4,7‐dihydroacepentalene)cobalt(I) in Contrast to its Tricarbonyliron Counterpart

AU - Schröder, Günter

AU - Butenschön, Holger

AU - Boese, Roland

AU - Lendvai, Tomas

AU - Meijere, Armin De

PY - 1991/11

Y1 - 1991/11

N2 - 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.

AB - 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.

KW - 4,7‐dihydro

KW - Acepentalene

KW - Cobalt complexes

KW - complexes

KW - Degenerate haptotropic rearrangement

KW - Iron complexes

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U2 - 10.1002/cber.19911241108

DO - 10.1002/cber.19911241108

M3 - Artikel

AN - SCOPUS:82455190946

VL - 124

SP - 2423

EP - 2427

JO - Chemische Berichte

JF - Chemische Berichte

SN - 0009-2940

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