Strong intramolecular O--H...O hydrogen bonds in quinaldic acid N-oxide and picolinic acid N-oxide

Strong intramolecular O--H...O hydrogen bonds in quinaldic acid N-oxide and picolinic acid N-oxide
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喹哪啶酸 N-氧化物和吡啶甲酸 N-氧化物中具有强分子内 O--H...O 氢键

DOI:
10.1107/s0108270100001475
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发表时间:
2000
期刊:
Acta crystallographica. Section C, Crystal structure communications
影响因子:
--
通讯作者:
Kroon
Kroon
中科院分区:
--
文献类型:
--
作者:
Steiner;Schreurs;Lutz;Kroon

文献摘要

被引文献

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标题化合物含有非常短的C-O-H⋯O-N型分子内氢键。在吡啶酸n -氧化物(2-羧基-吡啶n -氧化物),C6H5NO3, (I)和醌酸n -氧化物(2-羧基-喹啉n -氧化物),C10H7NO3, (II)中,O⋯O距离为2.425 (2)A。在(II)中,这与轻微的分子平面畸变有关,而在(I)中,这种效应无法观察到,因为分子在镜像平面上结晶。
The title compounds contain very short intramolecular hydrogen bonds of the type C—O—H⋯O—N. The O⋯O distances are 2.425 (2) A in picolinic acid N-oxide (2-carboxy­pyridine N-oxide), C6H5NO3, (I), and 2.435 (2) A in quinaldic acid N-oxide (2-carboxy­quinoline N-oxide), C10H7NO3, (II). In (II), this is associated with slight molecular distortion from planarity, while in (I), such an effect cannot be observed because the mol­ecule crystallizes on a mirror plane.