Cinchonidinium bis(perchlorate)

Abstract

In the title crystal structure, C19H24N2O2+·2ClO4 −, cations and anions are connected by intermolecular O—H...O and N—H...O hydrogen bonds, forming one-dimensional chains propagating in the the a-axis direction. These chains are, in turn, linked by weak C—H...O hydrogen bonds, forming a three-dimensional network.

Cinchonidinium bis(4-methylbenzenesulfonate) monohydrate

“…Various salts of cinchonidine have been reported previously, e.g. cinchonidinium pyruvate oxime (Borszeky et al, 1996), cinchonidinium (S)-mandelate (Gjerløv & Larsen, 1997), bis(cinchonidinium) l-tartrate dihydrate (Zhang et al, 2003), cinchonidinium (R,R)-tartrate monohydrate (Ryttersgaard & Larsen, 2003), cinchonidinium tris(tetrachlorobenzenediolato)phosphate (Favarger et al, 2004) and cinchonidinium bis(perchlorate) (Zhang et al, 2006). As a continuation of our research, we report here the title salt, (I).…”

Two novel violurate and squarate salts of cinchonine – Structures and physical properties

“…Our attempts to obtain the diprotonated cinchoninium dication using violuric acid at molar ratio 1:2 led to formation of only the salt (1), which can be explained by the three successive acid-base equilibria with pKa values of 4.56, 9.60 and 13.10 [15,16]. The diprotonated cation could be isolated as its squarate salt (2) when cinchonine was allowed to react with squaric acid at 1:1 M ratio.…”