Synthesis and properties of iron (II) quinoline-2-carboxylates, crystal structure of trans-diaquabis(quinoline-2-carboxylato)iron (II) bis(dichloromethane) solvate

Reaction between metallic iron and quinoline-2-carboxylic acid (Hquin-2-c) in dichloromethane yielded the amorphous Fe(quin-2-c)2 (1). In the presence of a small amount of water, X-ray suitable crystals of [Fe(quin-2-c)2(H2O)2] · 2CH2Cl2 (2) were obtained. The structure of 2 is compared with the literature reported [Fe(quin-2-c)2(H2O)2] · 2EtOH 2H2O (3), a system of strong hydrogen bonds in 2 and 3 create the 2D framework. The spectral and magnetic properties of all compounds are reported.