Die phpBib Artikel!

"Substituted Ring-Fused Yttrium Derivatives - X-ray Crystal Structures of [(LYCl₂Â·THF)LiClÂ·2THF] and [{LYCl(OH)}₆Â·2THF] (L = 2-Phenyl-4,5,6,7,8-hexahydroazulenyl)"

Autoren
Gino Paolucci, Manuela Vignola, Alessandra Zanella, Valerio Bertolasi, Eleonora Polo, Silvana Sostero

Abstract
The reaction of lithium salts of ring-fused ligands (L), where the ring fused to the cyclopentadienyl moiety is a saturated one (six, seven, or eight carbon atoms), with YCl3 in THF in 2:1 and 1:1 molar ratios affords complexes of formula [L2YCl]2 and [(LYCl2Â·THF)2LiClÂ·2THF], respectively. Here we report the synthesis, spectroscopic characterization, and X-ray crystal structure of [(L?YCl2Â·THF)2LiClÂ·2THF] (L? = 2-phenyl-4,5,6,7,8-hexahydroazulenyl), together with the crystal structure of the hexameric species [{L?YCl(OH)}6Â·2THF], which was quite unexpectedly isolated during the attempted crystallization of the latter complex and is probably formed by partial hydrolysis of that complex. The activity of the new complexes towards ethylene and 1-hexene polymerization reactions was also tested. (Â© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

Anmerkungen
Dipartimento di Chimica, UniversitÃ Ca?Foscari di Venezia, Dorsoduro 2137, 30123 Venezia, Italy; Centro di Strutturistica Diffrattometrica and Dipartimento di Chimica, UniversitÃ di Ferrara, 44100 Ferrara, Italy, Fax: +39-053-224-0709; C.N.R.I.S.O.F., sez. Ferrara, Dipartimento di Chimica, UniversitÃ di Ferrara, Ferrara, Italy, Fax: +39-053-224-0709 Citations: