Isomorphous crystals of strychninium 4-chlorobenzoate and strychninium 4-nitrobenzoate.
In strychninium 4-chlorobenzoate, C21H23N2O2+.C7H4ClO2-, (I), and strychninium 4-nitrobenzoate, C21H23N2O2+.C7H4NO4-, (II), the strychninium cations form pillars stabilized by C-H...O and C-H...pi hydrogen bonds. Channels between the pillars are occupied by anions linked to one another by C-H...pi hydrogen bonds. The cations and anions are linked by ionic N-H+...O- and C-H...X hydrogen bonds, where X=O, pi and Cl in (I), and O and pi in (II).
Białońska
Agata
A
Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland. bialonsk@wcheto.chem.uni.wroc.pl
Ciunik
Zbigniew
Z