Bis(azido-κ<i>N</i>)bis(quinolin-8-amine-κ² <i>N</i>,<i>N</i>′)iron(II) monohydrate

Abstract

In the hydrated title complex, [Fe(N 3 ) 2 (AQ) 2 ]·H 2 O (AQ is 8-aminoquinoline, C 9 H 9 N 2 ), the Fe II ion is coordinated in a distorted octahedral manner by two neutral, chelating AQ ligands and two anionic, monodentate azide (N 3 − ) 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 NH 2 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 NH 2 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.