In the crystal structure of the title complex, [CuCl(CHN)]ClO, the copper(II) metal exhibits an NCl penta-coordinate environment in a distorted square-pyramidal geometry. Coordination to the metal centre occurs through the three 1-methyl-imidazole N atoms from the pendant groups, one amine N atom from the imidazolidine moiety and one chlorido anion. Inter-molecular inter-actions take place at two of the 1-methyl--imidazole rings in the form of parallel-displaced π-π stacking inter-actions forming chains parallel to the axis. Three O atoms of the perchlorate anion are rotationally disordered between two orientations with occupancies of 0.5.
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