نتایج جستجو برای: cyclopentadienide

تعداد نتایج: 38  

he aromatic behavior of the azo-linked cyclopentadienide derivatives have been revealed in various natural compounds. In Tthis research, density functional theory (DFT) calculations at the B3LYP level are used to optimize the geometry of the compounds. In addition, we were interested in the evaluation of the aromaticity of the selected compounds using nucleus independent chemical shifts NIC...

Journal: :Macromolecular Rapid Communications 2021

The synthesis and characterization of polyferrocenylmethylene (PFM) starting from dilithium 2,2-bis(cyclopentadienide)propane a Me2C[1]magnesocenophane is reported. Molecular weights up to Mw = 11 700 g mol–1 featuring dispersity, Ð, 1.40 can be achieved. material studied by different methods comprising nuclear magnetic resonance (NMR) spectroscopy, matrix-assisted laser desorption/ionization t...

2006
Vasily V. Kotov Gerald Kehr Roland Fröhlich Gerhard Erker

Lithium cyclopentadienides are important reagents for the synthesis of organometallic compounds. In addition they feature an interesting manifold of structural variations in solution and in the crystal [1]. Variable temperature NMR spectroscopy has revealed markedly temperature dependent equilibria between monomeric lithium cyclopentadienides and their respective lithiocene salts [2]. A typical...

Journal: :Metal-Based Drugs 2008
Megan Hogan James Claffey Eoin Fitzpatrick Thomas Hickey Clara Pampillón Matthias Tacke

From the carbolithiation of 6-N,N-dimethylamino fulvene (3) and 2,4[bis(N,N-dimethylamino)methyl]-N-methylpyrrolyl lithium (2a), N-(N',N'-dimethylaminomethyl)benzimidazolyl lithium (2b), or p-(N,N-dimethylamino)methylphenyl lithium (2c), the corresponding lithium cyclopentadienide intermediate (4a-c) was formed. These three lithiated intermediates underwent a transmetallation reaction with TiCl...

2018
C. Rentsch

Cationic polymerisation of 6,6-disubstituted pentafulvenes yields highly unsaturated, reactive macromolecules of high mo. lecular weight. The mechanistic pathways leading to the polymers are discussed, and the structure XIV of the polymers has been elucidated by a combination of spectroscopic methods as well as by comparison with model compounds. In contrast to reports in the literature, the ma...

Journal: :Dalton transactions 2012
Andreas Glöckner Heiko Bauer Miyuki Maekawa Thomas Bannenberg Constantin G Daniliuc Peter G Jones Yu Sun Helmut Sitzmann Matthias Tamm Marc D Walter

A combination of phase-transfer and traditional alkylation strategies has been employed to synthesise sterically encumbered 1,3-di(cyclohexyl) and 1,3-di(tert-butyl) substituted indenes in multi-gram quantities. These indenyl ligands and sterically demanding alkyl cyclopentadienyl ligands have been used to prepare a series of [(η(7)-C(7)H(7))Zr(η(5)-L)] (L = Cp and Ind) complexes by straightfor...

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