(Quinoline-2-carboxyl­ato-κO)(quinoline-2-carb­oxy­lic acid-κO)bis­(quinoline-2-carb­oxy­lic acid-κ2 N,O)potassium

摘要

The K atom in the title complex, [K(C10H6NO2)(C10H7NO2)3], lies on a twofold rotation axis that relates one N,O-chelating quinoline-2-carb­oxy­lic acid to the other; their N and O atoms are cis to each other in the distorted octa­hedral coordination geometry. The K atom is also coordinated by another monodentate quinoline-2-carb­oxy­lic acid; the acid is disordered with respect to a monodentate quinoline-2-carboxyl­ate anion; the acid and anion are linked by an O—H⋯O hydrogen bond. An O—H⋯N hydrogen bond links adjacent mol­ecules into a linear chain structure along the a axis.