2,2'-Dimethyl-4,4'-(sulfonyldi-p-phenyl-ene)dibut-3-yn-2-ol dihydrate.

The asymmetric unit of the title compound, C(22)H(22)O(4)S·2H(2)O, contains one quarter of the organic mol-ecule and one half water mol-ecule, the site symmetries of the S atom and the water O atom being mm2 and m, respectively. The dihedral angle between the benzene rings is 76.27 (11)°.

5-(2-Phenyl-ethyn-yl)isobenzofuran-1,3-dione.

The title compound, C(16)H(8)O(3), was synthesized by the Pd-coupling reaction of phenyl-acetyl-ene with 4-bromo-phthalic anhydride. The phenyl and isobenzofurane rings are nearly coplanar, forming a dihedral angle of 6.70 (10)°.

1,1,3-Trimethyl-3-(4-nitro-phen-yl)indane.

In the title compound, C(18)H(19)NO(2), the five-membered ring of the indane fragment adopts an envelope conformation, with the unsubstituted C atom, acting as the flap atom, deviating by 0.412 (3) Å from the plane through the remaining four atoms. The dihedral angle between the nitro-phenyl ring and the indane benzene ring is 72.