Crystal structures of [M(N₃)₂(phen)₂] compounds, M = Mn, Co or Cu and phen = 1,10-phenanthroline

Crystal structures of the title compounds, [Mn(N₃)₂(phen)₂] (1), [Co(N₃)₂(phen)₂] (2) and [Cu(N₃)₂(phen)₂] · 1.5 H₂O (3), have been determined at 100 K. Central atoms of the above-mentioned compounds are coordinated by four pyridine nitrogen donor atoms from two 1,10-phenanthroline molecules and two nitrogen donor atoms of terminally coordinated azide anions, which resulted in a distorted {MN₆} octahedral geometry. The π-π stacking interactions, as well as weak C—H∙∙∙N hydrogen bonds, were observed in all three compounds. Moreover, complex 3 revealed also supramolecular chains of the complex and water molecules linked together through O—H∙∙∙N hydrogen bonds.