Doxylamine is an anti-allergic ether effective on Hi-type receptors. T
he crystal structures of dihydro cationic salts of doxylamine (dimethy
lammonio-ethoxy)-l-phenylethyl]pyridinium} with the anions tetrachloro
zincate(II), (C17H24N2O)[ZnCl4], and tetrachlorocobaltate(II), (C17H24
N2O)[CoCl4], are isomorphous. The molecular dimensions in both structu
res are normal, and the anions and cations are hydrogen bonded, result
ing in chain structures. The ZnCl42- and CoCl42- anions exhibit normal
tetrahedral geometries.