Variable-temperature one- and two-dimensional 13C CP/MAS NMR studies of the dynamics of monohaptocyclopentadienyl rings of hafnium and titanium tetracyclopentadienyl in the solid state
| Autor: | Leonidas Phillips, Eric J. Munson, Susan M. De Paul, Michelle C. Douskey, Marcia Ziegeweid, Frances Separovic, Manuel J. Aroney, Murray S. Davies |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Deuterium NMR
Chemistry Carbon-13 NMR satellite Organic Chemistry Nuclear magnetic resonance spectroscopy Nuclear magnetic resonance crystallography Sigmatropic reaction Photochemistry Biochemistry Inorganic Chemistry Crystallography Cyclopentadienyl complex Intramolecular force Materials Chemistry Physical and Theoretical Chemistry Group 2 organometallic chemistry |
| Zdroj: | Journal of Organometallic Chemistry. 577:19-23 |
| ISSN: | 0022-328X |
| Popis: | Organometallic compounds with cyclopentadienyl ligands (C5H5) can undergo fluxional motion. We have studied the Group IVB transition metal complexes of the formula M(η5-C5H5)2(η1-C5H5)2, where M=Ti and Hf, in the solid state using variable-temperature 13C CP/MAS NMR spectroscopy. We present data which indicate that intramolecular rearrangement proceeds via a sigmatropic shift. Using two-dimensional (2D) exchange NMR, we can follow the rearrangement of the single bonded cyclopentadienyl ligands. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect