(5-n-Hexyl-2-hydroxymethyl-1,3-dioxan-2-yl)methanol

In the title compound, C12H24O4, the dioxane ring adopts a chair conformation; the n-hexyl chain, which occupies an equatorial position, has an extended zigzag conformation. In the crystal, mol­ecules are connected by O—H⋯O hydrogen-bonds into a zigzag chain running along the b axis, giving rise to a herringbone pattern

Perillartine

The chiral title compound [systematic name: 4-(1-methyl­vinyl)cyclo­hexene-1-carbaldehyde oxime], C10H15NO, crystallizes with two mol­ecules in the asymmetric unit, one of which shows disorder of its propenyl substituent over two sets of sites in a 50:50 ratio. In both mol­ecules, the six-membered carbaldehyde oxime ring adopts an approximate envelope conformation in which the C atom bearing the propenyl substituent represents the flap position. In both mol­ecules, the plane passing through the propenyl substituent is nearly perpendicular to the mean plane of the six-membered ring [dihedral angles = 84.6 (6) and 87.4 (3)°]. In the crystal, the two independent mol­ecules are linked by a pair O—H⋯N hydrogen bonds across a pseudo-inversion centre, generating a dimer. The unit cell of the known racemate of the title compound is similar to the cell found here, but with space group P

(5-n-Heptyl-2-hydroxymethyl-1,3-dioxan-2-yl)methanol

In the title compound, C13H26O4, the dioxane rings adopts a chair conformation; the n-heptyl chain occupies an equatorial position. In the crystal, mol­ecules are connected by O—H⋯O hydrogen bonds into a zigzag chain running along the a axis, giving rise to a herringbone pattern. There are two independent mol­ecules in the asymmetric unit

7,11,18,21-Tetra­oxatrispiro­[5.2.2.5.2.2]heneicosa­ne

The four six-membered rings all adopt chair conformations in the two independent mol­ecules of the title cyclo­hexa­none cyclic diacetal with penta­erythritol, C17H28O4