Structural studies on inclusion compounds and solvent sorption behavior of gradually elongated wheel-and-axle-type diol hosts featuring lateral benzo[b]thiophene units

1-Methoxy-1,1-diphenylbut-2-yne

In the title compound, C17H16O, the phenyl rings are twisted relative to each other at an angle of 85.9 (1)°. The crystal structure features weak C—H...π interactions, which connect the molecules into a three-dimensional supramolecular network.

Crystal structures of functional building blocks derived from bis(benzo[b]thiophen-2-yl)methane

The syntheses of three bis(benzo[b]thiophen-2-yl)methane derivatives, namely bis(benzo[b]thiophen-2-yl)methanone, C17H10OS2, (I), 1,1-bis(benzo[b]thiophen-2-yl)-3-(trimethylsilyl)prop-2-yn-1-ol, C22H20OS2Si, (II), and 1,1-bis(benzo[b]thiophen-2-yl)prop-2-yn-1-ol, C19H12OS2, (III), are described and their crystal structures discussed comparatively. The conformation of ketone (I) and the respective analogues are rather similar for most of the compounds compared. This is true for the interplanar angles, the Caryl—Cbridge—Carylangles and the dihedral angles. The best resemblance is found for a bioisotere of (I),viz.2,2′-dinaphthyl ketone, (VII). By way of interest, the crystal packings also reveal similarities between (I) and (VII). In (I), the edge-to-face interactions seen between two napthyl residues in (VII) are substituted by S...π contacts between the benzo[b]thiophen-2-yl units in (I). In the structures of the bis(benzo[b]thiophen-2-yl)methanols,i.e.(II) and (III), the interplanar angles are also quite similar compared with analogues and related active pharmaceutical ingredients (APIs) containing the dithiophen-2-ylmethane scaffold, though the dihedral angles show a larger variability and produce unsymmetrical molecules.

Trimethyl 3,3′,3′′-(benzene-1,3,5-triyl)tripropynoate

In the title compound, C18H12O6, the alkyne bonds are distorted, featuring bond angles around the C—C[triple-bond]C—C group of 173.6 (1)/179.0 (1), 178.1 (1)/178.4 (1) and 174.9 (1)/175.9 (1)°, and the ester groups make angles of 3.5 (1), 13.8 (1) and 14.5 (1)° with the central benzene ring. In the crystal, molecules are connected in layers parallel to (131) by weak C—H...O hydrogen bonds, giving rise to a system of hydrogen-bonded ring motifs with graph setsR22(14) andR44(22). The layers are linked by C—H...O and C—H...π contacts.