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。
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。
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%.
最后经示波极谱、红外光谱和熔点测试法证明电合成的物质为异烟酸，纯度为97.7%。
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%.
最后经示波极谱、红外光谱和熔点测试法证明电合成的物质为异烟酸，纯度为97.7%。
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