Tris(1,10-phenanthroline-κ²N,N′)iron(II) bis­[(1,10-phenanthroline-κ²N,N′)tetra­kis­(thio­cyanato-κN)chromate(III)] acetonitrile tris­olvate monohydrate

Single crystals of the title heterometallic compound, [Fe(C₁₂H₈N₂)₃][Cr(NCS)₄(C₁₂H₈N₂)]₂·3CH₃CN·H₂O or [Fe(Cphen)₃][Cr(NCS)₄(phen)]₂·3CH₃CN·H₂O, were pre­pared using the one-pot open-air reaction of iron powder, Reineckes salt and 1,10-phenanthroline (phen) in acetonitrile. The asymetric unit consists of an [Fe(phen)₃]²⁺ cation, two [Cr(phen)(NCS)₄]⁻ anions, three acetonitrile solvent mol­ecules and a water mol­ecule. The Fe and Cr atoms both show a slightly distorted octa­hedral FeN₆ and CrN₆ coordination geometry with adjacent angles in the range 79.67 (12)–95.21 (12)°. No classical hydrogen bonding involving the water molecule is observed.