Bis(azido-κN)bis(quinolin-8-amine-κ2N,N′)iron(II) monohydrate

Abstract

In the hydrated title complex, [Fe(N3)2(AQ)2]·H2O (AQ is 8-aminoquinoline, C9H9N2), the FeII ion is coordinated in a distorted octahedral manner by two neutral, chelating AQ ligands and two anionic, monodentate azide (N3−) ions in a syn,cis-configuration. From the two AQ ligands, the pyridyl N atoms are opposite to each other and the amino groups trans to the azide ligands. Distortion results from different Fe—N bond lengths [2.112 (2)–2.231 (2) Å] and 〈(N—Fe—N)cis [75.25 (6)–99.91 (7)°] and 〈(N—Fe—N)trans [159.98 (7)–170.62 (7)°] bond angles. The water molecule acts as the acceptor of hydrogen bonds with the NH2 groups of both AQ-ligands in one and the same molecule, and as donor to the γ-N and α-N atoms of the azido ligands of two adjacent iron complexes. In addition, both terminal N atoms of the azido ligands are involved in hydrogen bonds with NH2 groups in neighboring iron complexes, so that the hydrogen-bonding pattern leads to a rod-like arrangement of the molecules in the b-axis direction.

Keywords

• crystal structure
• azide
• iron(ii)
• hydrogen-bonding
• 8-aminoquinoline