SYNTHESIS AND CRYSTAL-STRUCTURE OF 1,1'-(3-OXAPENTAMETHYLENE)-BRIDGEDBIS(INDENYL) ANSA-LANTHANOCENE CHLORIDES

Authors
Citation
Ct. Qian et al., SYNTHESIS AND CRYSTAL-STRUCTURE OF 1,1'-(3-OXAPENTAMETHYLENE)-BRIDGEDBIS(INDENYL) ANSA-LANTHANOCENE CHLORIDES, Journal of the Chemical Society. Dalton transactions, (10), 1998, pp. 1607-1611
Citations number
43
Categorie Soggetti
Chemistry Inorganic & Nuclear
ISSN journal
03009246
Issue
10
Year of publication
1998
Pages
1607 - 1611
Database
ISI
SICI code
0300-9246(1998):10<1607:SACO1>2.0.ZU;2-Z
Abstract
Several representative chiral ansa-lanthanocene chlorides have been sy nthesized and characterised with a rac:meso ratio of 6:1 using an ethe r-bridged bis(indenyl) ligand. The structure of these complexes was id entified by X-ray crystallography in the solid state or H-1 NMR spectr oscopy in solution. The ligand proved to be rather rigid leading to th e favoured unsymmetric rac isomer. The H-1 NMR spectra indicated that the configuration of the rac isomer in solution agrees well with that in the solid state and, interestingly, the two bridged indenyl rings o f the rac isomers slowly oscillated.