Quaterpyridine refers to a family of pyridine derivatives with the formula (NC<sub>5</sub>H<sub>4</sub>-C<sub>5</sub>H<sub>3</sub>N)<sub>2</sub>. These compounds can also be viewed as bipyridine decorated with two pyridyl substituents. Several isomers are known. All are colorless solids. One particular isomer, 2,2':6',2<nowiki></nowiki>:6<nowiki></nowiki>,2<nowiki></nowiki>-quaterpyridine, a derivative of 2,2'-bipyridine has attracted interest because it is a potential tetradentate ligand in coordination chemistry.