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In the title complex, [FeZn(C 5 H 5 )(C 20 H 14 N 3 )(C 12 H 8 N 2 )](ClO 4 ) 2 ·CH 3 CN, the Zn II  atom is five-coordinated by a tridentate chelating 4′-ferrocenyl-2,2′:6′,2′′-terpyridine (fctpy) ligand and a bidentate chelating 1,10-phenanthroline (phen) ligand in a distorted square-pyramidal environment with a phen N atom located at the apical position [Zn—N = 2.259 (4) Å]. The terpyridyl motif in each fctpy ligand is coplanar, but the cyclo­penta­dienyl ring is twisted by 9.5 (2)° out of coplanarity with each central pyridine. The two cyclo­penta­dienyl rings of the ferrocenyl group are almost eclipsed with a deviation of 4.5 (1)°. In addition, inter­molecular π–π inter­actions [centroid–centroid distance 3.753 (2) Å] are present between the cyclo­penta­dienyl and outer pyridyl rings of the fctpy ligands. One of the perchlorate anions is equally disordered over two positions.

acta crystallographica. section e

(4′-Ferrocenyl-2,2′:6′,2′′-terpyridine-κ3N1,N1′,N1′′)(1,10-phenanthroline-κ2N,N′)zinc(II) bis(perchlorate) acetonitrile monosolvate