ISSN:
1572-8854
Keywords:
disilylene-bridged zirconocene complex
;
synthesis, structure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract Reaction of lithiated 1,1′,2,2′-tetramethyl-disilyl-1,2-bis[2-(4,5,6,7,8-pentahydro)-azulene] (I) with ZrCl4 in THF at −78°C gave the new {1,1′,2,2′-tetramethyl-disilyl-1,2-bis[2-(4,5,6,7,8-pentahydro)-azulenyl]}rcub;zirconium dichloride complex (II) in reasonable yield. It crystallizes in the orthorhombic Pnma space group with a = 19.792(4), b = 18.493(3), c = 7.105(1) Å and Z = 4. The complex (II) is symmetric with respect to a mirror plane passing through the Zr and the two Cl atoms. The coordination geometry of Zr atom is that of a distorted tetrahedron formed by the two Cl atoms and the centroids of the two cyclopentadienyl rings of the pentahydroazulenyl moieties. The Zr—Cl bond lengths are 2.451(2) and 2.419(2) Å and the Zr—C distances vary in the range 2.437(4)–2.588(4) Å.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1012242010039
Permalink
