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The structure of the title compound [systematic name: 2-hy­droxy-6-methyl-3-(1-methylethyl)benzaldehyde oxime] C11H15NO2, exhibits intra- as well as inter­molecular hydrogen bonding, involving participation of the phenolic OH group in intra­molecular hydrogen bonding and the hydroxyl group of the oxime in inter­molecular hydrogen bonding. The H atom of the phenolic hydroxyl group forms a strong O—H...N intra­molecular hydrogen bond with an O...N distance of 2.5788 (14) Å, which is in the middle of the expected range for such hydrogen bonds. The H atom of the hydroxyl group (in the oxime functionality) forms a weaker hydrogen bond with the phenolic hydroxyl group of a neighboring mol­ecule [O...O = 2.8317 (14) Å], forming an extended chain, as expected for phenolic aldoximes which have bulky substituents on the aryl ring.
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