organic compounds
Two independent ion pairs [(6-methoxy-4-quinolyl)(5-vinyl-1-azoniabicyclo[2.2.2]octan-2-yl)methanol hydrogen 2,3-dihydroxybutanedioate] and a water molecule are found in the asymmetric unit of 2C20H25N2O2+.2C4H5O6-.H2O. The two cations are virtually identical, but the two anions have markedly different stereochemistry. One of these anions adopts a unique conformation not observed previously for hydrogen tartrate ions. The packing resembles the arrangement in cinchonidinium (S)-mandelate, with hydrogen-bonded chains of alternating cations and anions. The herring-bone stacking of the quinoline ring systems of the cations resembles the pattern seen in other cinchona structures.
Supporting information
Crystallographic Information File (CIF) | |
Structure factor file (CIF format) |
CCDC reference: 130604