A Five-Membered Ring with Three Negative Charges and Solvent-Free Lithium Counterions.
Remarkably short distances to the ring plane are shown by the eta(5)-bound lithium ions in the first compound with a triply negatively charged five-membered ring, 1, which was obtained by reduction of 2 with lithium. R=CH(SiMe(3))(2), Dur=2,3,5,6-tetramethylphenyl.
Scheschkewitz
D
Fachbereich Chemie der Universität, D-35032 Marburg (Germany).
Menzel
M
Hofmann
M
Schleyer
Pv
Geiseler
G
Massa
W
Harms
K
Berndt
A