XeO3 adducts of pyridine, 4-dimethylaminopyridine, and their pyridinium salts

Xenon trioxide (XeO3), a highly shock-sensitive detonator, forms adducts with the N-bases, pyridine and 4-dimethylaminopyridine (4-DMAP). The reactions of pyridine and 4-DMAP with XeO3 in rigorously dried CH3CN and in CH3CN that had not been dried yielded (C5H5N)3XeO3 (1) and (4-(CH3)2NC5H5N)3 XeO3·H2O (3), respectively, whereas their reactions in HF-acidified CH3CN yielded [C5H5NH]4[HF2]2[F]2(XeO3)2 (2) and [4-(CH3)2NC5H4NH][HF2]XeO3 (4). …