Crystal structure of bis[4-(di­methyl­amino)­pyridinium] bis(2-nitro­benzoate) trihydrate

The title salt crystallized with two anions and two cations in the asymmetric unit, together with three water mol­ecules. In the crystal, the anions are linked via O—H...O hydrogen bonds, involving the water mol­ecules, forming chains along [100] and the cations are linked to these chains by N—H...O hydrogen bonds.

Crystal structure of 6-(4-chloro­phen­yl)-6a-nitro-6,6a,6b,7,9,11a-hexa­hydro­spiro[chromeno[3′,4′:3,4]pyrrolo­[1,2-c]thia­zole-11,11′-indeno­[1,2-b]quinoxaline] chloro­form monosolvate

In the title compound, C₃₃H₂₃ClN₄O₃S·CHCl₃, the thia­zole ring adopts an envelope conformation with the N atom as the flap, and the pyrrolidine ring adopts a half-chair conformation. The thia­zole ring mean plane makes a dihedral angle of 59.31 (1)° with the pyrrolidine ring mean plane, 71.67 (1)° with the chromene ring and 82.59 (1)° with the chloro­benzene ring. An intra­molecular C—H...N hydrogen bond occurs. In the crystal, a second C—H...N hydrogen bond links the main and solvent mol­ecules. The solvent chloroform molecule is disordered about two positions with an occupancy ratio of 0.508 (14):0.492 (14).