1,3,4,5-Tetramethyl-2-methyleneimidazoline—an ylidic olefin

Abstract
The ylidic properties of 1,3,4,5-tetramethyl-2-methyleneimidazoline 4, obtained by deprotonation of the pentamethylimidazolium ion 3, are revealed both by its physical and chemical properties; the X-ray structure of 4 is reported.