ISSN:
1572-901X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary The reduction of Cp2TiCl2 with LiAlH4 in olefinic solvents at temperatures above 100° leads to the formation of µ-(η 5 :η 5-fulvalene)-di-µ-chloro-bis(η 5-cyclopentadienyl-titanium) (1) and finally to µ-(η 5 :η 15-fulvalene)-di-µ-hydrido-bis (η 5-cyclopentadienyltitanium). The first step of the reduction includes mainly the formation of the dimer of bis(η 5-cyclopentadienyl)titanium(III) chloride, (Cp2TiCl)2. The mechanism of its conversion into (1) involves the formation of an intermediate bis(η 5-cyclopentadienyl)titanium(III) hydride species which reacts immediately with the olefinic solvent to give bis(η 5-cyclopentadienyl)alkyltitanium(III) compounds. The formation of the fulvalene ligand in (1) is explained by the interaction of the alkyltitanium compound with the cyclopentadienyl ligands of (Cp2TiCl)2 resulting in hydrogen transfer to the olefinic solvent.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01396856
