Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 5642-5647 |
| Seitenumfang | 6 |
| Fachzeitschrift | Chemistry - A European Journal |
| Jahrgang | 12 |
| Ausgabenummer | 21 |
| Publikationsstatus | Veröffentlicht - 7 Juli 2006 |
Abstract
Treatment of {η5:η1)[2-(di-tert- butylphosphanyl-P)ethyl]cyclopentadienyl}cobalt(I) chloride (5) with methylenecyclopropane (3) or bicyclopropylidene (4), as well as with their spirocyclopropanated analogues methylenespiropentane (7), cyclopropylidenespiropentane (10), or 7,7′-bi(dispiro-[2.0.2.1] heptylidene) (15) in the presence of sodium amalgam at -50°C, furnished the stable cobalt complexes 6, 9, 8, 11, and 16, respectively, in 72, 83, 84, 86, and 54% isolated yield, respectively. The complexes 14 and 16 were also obtained by ligand exchange of the ethene complex {η5: η1[2-(di-tert-butylphosphanyl-P)ethyl]cyclopentadienyl} (η2-ethene)cobalt(I) (12) with 13 and 15 in 79 and 52% yield, respective ly. The X-ray crystal-structure analyses of complexes 9, 14, and 16, as well as the NMR-spectroscopic data of all complexes, reveal that they can be regarded as linear and branched cobalta[n]triangulanes. The thermal stability of complexes 6, 8, and 9 up to 109, 145, and 160°C was determined by differential thermal analysis-thermogravimetry (DTA-TG) analysis.
ASJC Scopus Sachgebiete
- Chemische Verfahrenstechnik (insg.)
- Katalyse
- Chemie (insg.)
- Organische Chemie
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in: Chemistry - A European Journal, Jahrgang 12, Nr. 21, 07.07.2006, S. 5642-5647.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Syntheses and structures of sterically congested linear and branched cobalta[n]triangulanes
AU - Kozhushkov, Sergei I.
AU - Foerstner, Jan
AU - Kakoschke, Alf
AU - Stellfeldt, Dirk
AU - Yong, Li
AU - Wartchow, Rudolf
AU - De Meijere, Armin
AU - Butenschön, Holger
PY - 2006/7/7
Y1 - 2006/7/7
N2 - Treatment of {η5:η1)[2-(di-tert- butylphosphanyl-P)ethyl]cyclopentadienyl}cobalt(I) chloride (5) with methylenecyclopropane (3) or bicyclopropylidene (4), as well as with their spirocyclopropanated analogues methylenespiropentane (7), cyclopropylidenespiropentane (10), or 7,7′-bi(dispiro-[2.0.2.1] heptylidene) (15) in the presence of sodium amalgam at -50°C, furnished the stable cobalt complexes 6, 9, 8, 11, and 16, respectively, in 72, 83, 84, 86, and 54% isolated yield, respectively. The complexes 14 and 16 were also obtained by ligand exchange of the ethene complex {η5: η1[2-(di-tert-butylphosphanyl-P)ethyl]cyclopentadienyl} (η2-ethene)cobalt(I) (12) with 13 and 15 in 79 and 52% yield, respective ly. The X-ray crystal-structure analyses of complexes 9, 14, and 16, as well as the NMR-spectroscopic data of all complexes, reveal that they can be regarded as linear and branched cobalta[n]triangulanes. The thermal stability of complexes 6, 8, and 9 up to 109, 145, and 160°C was determined by differential thermal analysis-thermogravimetry (DTA-TG) analysis.
AB - Treatment of {η5:η1)[2-(di-tert- butylphosphanyl-P)ethyl]cyclopentadienyl}cobalt(I) chloride (5) with methylenecyclopropane (3) or bicyclopropylidene (4), as well as with their spirocyclopropanated analogues methylenespiropentane (7), cyclopropylidenespiropentane (10), or 7,7′-bi(dispiro-[2.0.2.1] heptylidene) (15) in the presence of sodium amalgam at -50°C, furnished the stable cobalt complexes 6, 9, 8, 11, and 16, respectively, in 72, 83, 84, 86, and 54% isolated yield, respectively. The complexes 14 and 16 were also obtained by ligand exchange of the ethene complex {η5: η1[2-(di-tert-butylphosphanyl-P)ethyl]cyclopentadienyl} (η2-ethene)cobalt(I) (12) with 13 and 15 in 79 and 52% yield, respective ly. The X-ray crystal-structure analyses of complexes 9, 14, and 16, as well as the NMR-spectroscopic data of all complexes, reveal that they can be regarded as linear and branched cobalta[n]triangulanes. The thermal stability of complexes 6, 8, and 9 up to 109, 145, and 160°C was determined by differential thermal analysis-thermogravimetry (DTA-TG) analysis.
KW - Cobalt
KW - Spiro compounds
KW - Strained molecules
KW - Structure elucidation
KW - Triangulanes
UR - http://www.scopus.com/inward/record.url?scp=33746305028&partnerID=8YFLogxK
U2 - 10.1002/chem.200600118
DO - 10.1002/chem.200600118
M3 - Article
AN - SCOPUS:33746305028
VL - 12
SP - 5642
EP - 5647
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 21
ER -