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In 1, the acid hydrazide moiety of INH is linked to a similar group in another molecule in a head-to-head arrangement forming an acid-hydrazide/acid-hydrazide homosynthon which resembles the amide dimers in primary amides. There are only 54 crystal structures deposited in the CSD where one acid hydrazide group is linked to another via homosynthon II (the CSD search was made by restricting both the H-bond distances [N¨CH/O distances in the range of 0.0¨C2.5?A] and only organic molecules were considered) and it is worth mentioning that II is not found in the crystal packing of INH itself. ÏëÖªµÀºìÏߵIJ¿·ÖÊÇÈçºÎʵÏֵ쬶àл£¡ |
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