Crystal and molecular structure of 3,3′-thio-bis-(2-methyl-1-phenylimidazo-[1,5-a]pyridinium) bistetrafluoroborate; a potent new sulphur-containing curariform agent

Abstract

Determination of the X-ray structure of the title compound, a new diquaternary monosulphide having potent neuromuscular blocking activity, has shown that the intramolecular distances between potential quaternary nitrogens are less than 4·81 Å; the non-planarity of the molecule is in striking contrast with related compounds which show comparable activity.