Theoretical optimizations show that the equilibrium geometries of the three picolinic acid molecules are planar.
理论优化表明，三个吡啶甲酸分子都具有平面的平衡构型。
2
Theoretical optimizations with both basis sets show that the equilibrium geometries of the three picolinic acid molecules are completely planar.
二套基组的理论优化表明，三个吡啶甲酸分子都具有平面的平衡构型。
3
The product was identified by oscillopolarography, infrared spectrometry and melting point test. The purity of 4-picolinic acid determined by the oscillopolarography was about 97.7%.