A planar tetradentate dinuclear ligand, 3, 5-bis(2-pyridyl) pyrazole, was synthesized by a three-step reaction of esterification, condensation and addition.

以2-吡啶甲料，经酯化、缩合、成合成了平面核配体3，5-二（2-吡啶基）吡唑。