In the title compound, C13H19NO2, the dioxane ring adopts a chair conformation and its mean plane makes a dihedral angle of 45.36 (8)° with the phenyl ring. In the crystal, mol-ecules are linked by pairs of N-H⋯O hydrogen bonds, forming inversion dimers with R (2) 2(12) ring motifs. These dimers are consolidated by pairs of C-H⋯O hydrogen bonds with R (2) 2(8) ring motifs.

In the title compound, C(12)H(24)O(4), the dioxane ring adopts a chair conformation; the n-hexyl chain, which occupies an equatorial position, has an extended zigzag conformation. In the crystal, mol-ecules are connected by O-H⋯O hydrogen-bonds into a zigzag chain running along the b axis, giving rise to a herringbone pattern.

An optimized and validated spectrophotometric method has been described for the quantitative analysis of uranyl ion in soil samples. The method is based on the chelation of uranyl ion with piroxicam to produce a yellow complex in 1,4-dioxan–water medium at room temperature which absorbs maximally at 390 nm. Beer’s law is obeyed in the concentration range of 6.75 × 10 – 9.45 × 10 μg mL with appa...

6-Phenylfulvenes bearing (1,3-dioxolan or dioxan)-2-yl substituents at ortho position convert into mixtures of 4- and 9-(hydroxy)alkoxy-substituted benz[f]indenes as result of cascade processes initiated by a thermally activated hydrogen shift. Structurally related fulvenes with non-cyclic acetalic units afforded mixtures of 4- and 9-alkoxybenz[f]indenes under similar thermal conditions. Mechan...

1. The solubilities of l-tyrosine, dichloro-l-tyrosine (hydrated), dibromo-l-tyrosine (anhydrous), and diiodo-l-tyrosine in ethanol-water mixtures at 25 degrees have been determined. 2. It was found that the solubilities of the dihalogenated substitution products of l-tyrosine are increased by addition of ethanol up to a certain concentration. Further addition of ethanol leads to a decrease in ...