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The title complex, [CuFe(C 5 H 5 )(C 20 H 14 N 3 )(C 12 H 8 N 2 )](ClO 4 ) 2 ·C 2 H 3 N, consists of a mononuclear [Cu(C 12 H 8 N 2 )(C 25 H 19 FeN 3 )] 2+  cation, two ClO 4−  anions (one of which is disordered over two positions with equal occupancy) and one CH 3 CN solvent mol­ecule. The Cu II  center has a distorted square-pyramidal coordination with three N atoms of the 4′-ferrocenyl-2,2′:6′,2′′- terpyridine (fctpy) ligand and one 1,10-phenanthroline (phen) N atom in the basal plane and a second phen N atom in the apical position with an axial distance of 2.254 (4) Å. The disordered ClO 4−  anion is weakly coordin­ated to the Cu II  ion with a Cu—O distance of 2.766 (11) Å. The two cyclo­penta­dienyl rings of the ferrocenyl group are almost eclipsed with a deviation of 4.7 (1) °, and are involved in inter­molecular π–π inter­actions with the outer pyridyl rings of the fctpy ligands [centroid–centroid distance = 3.759 (2) Å.].

acta crystallographica. section e

(4′-Ferrocenyl-2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)(1,10-phenanthroline-κ2N,N′)copper(II) bis(perchlorate) acetonitrile solvate