PHOTOCHEMICAL ISOMERIZATION OF ME2SI-BRIDGED ZIRCONOCENE COMPLEXES - APPLICATION TO STEREOSELECTIVE SYNTHESES OF ANSA-ZIRCONOCENE BINAPHTHOLATE STEREOISOMERS

Authors
SCHMID K REINMUTH A RIEF U DIEBOLD J BRINTZINGER HH
Citation
K. Schmid et al., PHOTOCHEMICAL ISOMERIZATION OF ME2SI-BRIDGED ZIRCONOCENE COMPLEXES - APPLICATION TO STEREOSELECTIVE SYNTHESES OF ANSA-ZIRCONOCENE BINAPHTHOLATE STEREOISOMERS, Organometallics, 16(8), 1997, pp. 1724-1728
Citations number
37
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Organometallics → ACNP
ISSN journal
02767333
Volume
16
Issue
8
Year of publication
1997
Pages
1724 - 1728
Database
ISI
SICI code
0276-7333(1997)16:8<1724:PIOMZC>2.0.ZU;2-R
Abstract
Upon irradiation in toluene solution, meso-racemate mixtures of Me2Si( 2-Me-4-tBu-C5H2)(2)-ZrCl2 or Me2Si(2-Me-4-phenyl-C5H2)(2)ZrCl2 react w ith I equiv of the dilithium salt of racemic binaphthol quantitatively to the racemic binaphtholate complex. Analogous reactions with I equi v of the R(+) enantiomer of dilithium binaphtholate give a near-quanti tative yield of the enantiomerically pure ansa-zirconocene binaphthola te complex. The structures of the racemic binaphtholate complex, Me2Si (2-Me-4-tBu-C5H2)(2)Zr(binaphtholate) and of a monodentate binaphthola te complex with a meso configurated zirconocene moiety, Me2Si(3-tBu-C5 H3)(2)Zr(binaphtholate) chloride, were crystallographically determined .