Bis(mu-eta(5):eta(5)-1,4-bis(trimethylsilyl)cyclooctatetraene)dititanium -the first compound with a strong Ti-Ti bond

Authors
Horacek, M Kupfer, V Thewalt, U Stepnicka, P Polasek, M Mach, K
Citation
M. Horacek et al., Bis(mu-eta(5):eta(5)-1,4-bis(trimethylsilyl)cyclooctatetraene)dititanium -the first compound with a strong Ti-Ti bond, J ORGMET CH, 584(2), 1999, pp. 286-292
Citations number
36
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF ORGANOMETALLIC CHEMISTRY
ISSN journal
0022328X → ACNP
Volume
584
Issue
2
Year of publication
1999
Pages
286 - 292
Database
ISI
SICI code
0022-328X(19990723)584:2<286:B->2.0.ZU;2-Q
Abstract
The reduction of {[eta(8)-1,4-(SiMe3)(2)C8H6]Ti(mu-Cl)}(2)(THF) by magnesiu m in the presence of bis(trimethylsilyl)acetylene in tetrahydrofuran afford s diamagnetic bis[mu-eta(5):eta(5)-1,4-bis(trimethylsilyl)cyclooctatetraene titanium](Ti-Ti) (1) in low yield. The X-ray crystal analysis of 1 revealed that bridging cyclooctatetraene ligands in the centrosymmetric dimer are c oncave-bent. An extremely short Ti-Ti distance of 2.326(2) Angstrom is comp atible with the presence of a double Ti-Ti bond. (C) 1999 Elsevier Science S.A. All rights reserved.