Ethylene rotation in chiral octahedral rhenium(I) complexes

Citation
La. Friedman et al., Ethylene rotation in chiral octahedral rhenium(I) complexes, ORGANOMETAL, 20(8), 2001, pp. 1699-1702
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANOMETALLICS
ISSN journal
0276-7333 → ACNP
Volume
20
Issue
8
Year of publication
2001
Pages
1699 - 1702
Database
ISI
SICI code
0276-7333(20010416)20:8<1699:ERICOR>2.0.ZU;2-V
Abstract
A series of complexes of the type [TpRe(CO)(L-D)(eta (2)-ethylene)] has bee n synthesized where Lo is (BuNC)-Bu-t, PMe3, pyridine, 1-methylimidazole, o r NH3 (increasing in electron-donating ability of L-D). The rates of the pr opeller-like rotation of ethylene about the ethylene-rhenium bond have been determined using spin saturation transfer experiments at low temperatures (-85 to -60 degreesC). It was found that the DeltaG(double dagger) values c orrelate with both the C dropO stretching frequencies and Re(II/I) reductio n potentials for these complexes, indicating that the barrier to rotation i s primarily electronic in nature.