P. Poremba et al., PREPARATION AND STRUCTURAL CHARACTERIZATION OF THE DILITHIUM 1,4-BIS(TRIMETHYLSILYL)CYCLOOCTATETRAENIDE BIS(DIMETHOXYETHANE) ADDUCT, Organometallics, 17(5), 1998, pp. 986-988
The organolithium compound [Li(DME)](2)[C8H6(SiMe3)(2)-1,4] (2) was pr
epared and characterized by a single-crystal X-ray structural analysis
. The structure consists of a 1,4-bis(trimethylsilyl)cyclooctatetraene
dianion with the two lithium atoms coordinated to the ring in an eta(
3)-allyl-like fashion. The corresponding potassium derivative K-2[C8H6
(SiMe3)(2)-1,4] (3) has been prepared by deprotonation of 1,4-bis(trim
ethylsilyl)-2,5, 7-cyclooctatriene with potassium hydride.