Four new picolinohydrazonamide derivatives, namely, 6-methyl-N′-(morpholine-4-carbonothioyl)picolinohydrazonamide, C12H17N5OS, 6-chloro-N′-(morpholine-4-carbonothioyl)picolinohydrazonamide methanol monosolvate, C11H14ClN5OS·CH3OH, 6-chloro-N′-(4-phenylpiperazine-1-carbonothioyl)picolinohydrazonamide, C17H19ClN6S, and 6-chloropicolinohydrazonamide, C6H7ClN4, have been synthesized and characterized by NMR spectroscopy and single-crystal low-temperature X-ray diffraction. In addition, their antibacterial and anti-yeast activities have been determined. The first three compounds adopt the zwitterionic form in the crystal structure regardless of the presence or absence of solvent molecules in the structure. They also adopt the same symmetry, i.e. P21/c (P21/n), unlike the fourth structure which is chiral and has the space group P212121. For all the studied cases, intermolecular N—H...O and N—H...N hydrogen bonds play an essential role in the formation of the structures.
四种新的吡啶甲酰肼衍生物,即 6-甲基-N′-(吗啉-4-甲硫基)吡啶甲酰肼,C12H17N5OS;6-氯-N′-(吗啉-4-甲硫基)吡啶甲酰肼甲醇单溶酯,C11H14ClN5OS-CH3OH、合成了 6-氯-N′-(4-苯基哌嗪-1-碳硫酰基)吡啶甲酰肼(C17H19ClN6S)和 6-氯-吡啶甲酰肼(C6H7ClN4),并通过核磁共振光谱和单晶低温 X 射线衍射进行了表征。此外,还测定了它们的抗菌和抗酵母活性。无论晶体结构中是否存在溶剂分子,前三种化合物在晶体结构中都采用了齐聚物形式。它们还采用了相同的对称性,即 P21/c(P21/n),而第四种结构则不同,它是手性结构,空间群为 P212121。在所研究的所有结构中,分子间的 N-H...O 和 N-H...N 氢键在结构的形成过程中起着至关重要的作用。