1-[2-Hy-droxy-4-(prop-2-yn-1-yl-oxy)phen-yl]ethanone.

In the title compound, C11H10O3, there is an intra-molecular O-H⋯O hydrogen bond generating an S(6) ring motif. The O atom of the hy-droxy group deviates by 0.0200 (1) Å from the benzene ring to which it is attached.

2-Hy-droxy-4-(prop-2-yn-yloxy)benz-alde-hyde.

The asymmetric unit of the title compound, C10H8O3, contains two independent mol-ecules, both of which are almost planar (r.m.s deviations for all non-H atoms of 0.

2,4-Bis[(prop-2-yn-yl)-oxy]benzaldehyde.

In the title compound, C(13)H(10)O(3), two prop-2-yn-yloxy groups are attached to the benzaldehyde ring at positions 2 and 6. The crystal packing features C-H⋯O inter-actions.

Synthesis and crystal structure of hydroxyacetophenone Schiff bases containing propargyl moiety: solvent effects on UV-visible spectra.

Four tetradentate (N(2)O(2)) and tridentate (NO(2)) Schiff base compounds (L1-L4) with propargyl moiety were prepared by the condensation of 1-[2-hydroxy-4-(prop-2-yn-1-yloxy)phenyl]ethanone with various aliphatic amines. The newly synthesized compounds (L1-L4) were characterized on the basis of the results of elemental analysis, thermal analysis, FT-IR, (1)H NMR spectroscopic studies and single crystal X-ray crystallography. The different bands observed in the electronic spectra of the compounds in various organic solvents have been assigned to the proper electronic transitions.