Chloropyramine Tetrachlorocuprate(II)

The crystal structure of N-(4-chlorobenzyl)-N',N'-dimethyl-N-(2-pyridinio)-1,2-ethanediammonium tetrachlorocopper(II), (C₁₆H₂₂ClN₃)[CuCl₄], contains the dication of chloropyramine, a potent anti-allergic agent effective on H₁-type receptors. The CuCl₄^2- anion exhibits a flattened-tetrahedral geometry. The ammonium H atom is weakly bonded to two Cl atoms of the anion and the pyridyl N atom is involved in a short hydrogen bond to a Cl atom of the anion.

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