(2-tert-Butyl-3-phenyl-2,3-di­hydro­isoxazole-4,5-di­yl)bis­(phenyl­methanone)

The phenyl and tert-butyl groups of the title compound, C₂₇H₂₅NO₃, exhibit a trans configuration in agreement with the stereochemistry of the Z phenyl-N-tert-butyl­nitrone starting material. The attached carbonyl groups are not coplanar with the neighboring di­hydro­isoxazole ring and the phenyl rings they are bonded to, with torsion angles of 59.26 (8), 17.53 (11), 16.52 (12) and 52.86 (7)°. The dihedral angle between the di­hydro­isoxazole ring and the directly attached phenyl group is 86.86 (8)°. There are two nonclassical inter­molecular C—H...O hydrogen-bonding inter­actions that operate together with an inter­molecular C—H...π inter­action to form a supramolecular architecture in the crystal system.

N′-{(E)-[5-(Hy­droxy­meth­yl)furan-2-yl]methyl­idene}pyridine-4-carbohydrazide dihydrate

In the title compound, C₁₂H₁₁N₃O₃·2H₂O, the dihedral angle formed by the planes of the pyridine and the furan rings of the organic carbohydrazide mol­ecule is 4.66 (7)°. In the crystal, these mol­ecules form stacks along the b-axis direction, neighbouring mol­ecules within each stack being related by inversion and the shortest distance between the centroids of the pyridine and furan rings being 3.714 (1) Å. Mol­ecules from neighboring stacks are linked by pairs of N—H...O hydrogen bonds. The water mol­ecules fill the channels between the stacks being linked by O—H...O hydrogen bonds into helices along [010]. Besides this, water mol­ecules are involved in O—H...N and O—H...O hydrogen bonds with the carbohydrazide mol­ecules, thus forming a three-dimensional network, augmented by weak C—H...O interactions.