Abstract
The structures of racemic 2α-hydroxy-4-hydroxyiminopinan-3-one (1) and 3-hydroxyimino-cis-pinan-4-one monohydrate (2) have been determined by X-ray diffraction. The crystals of1 are monoclinic:P21/c, a=7.838(2),b=10.776(3),c=12.025(3) A, β=105.09(1)°,Z=4, room temp.; the crystals of2 are orthorhombic;P212121,a=8.181(3),b=9.250(3),c=14.085(6)A,Z=4, T=80K. Both structures were solved by direct methods, and refined toR=0.037 for 1920 reflections (1) and 0.032 for 1776 reflections (2). The absolute configuration of2 was not established. The hydroxyimine groups in both crystals and water molecules in2 participate in the network O−H...O of hydrogen bonds.
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