CRYSTAL STRUCTURES OF TROPONOID LIQUID-CRYSTALLINE COMPOUNDS: 5-CYANO-2-(4-OCTYLOXYBENZOYLAMINO)-TROPONE AND BIS(5-DODECYLTROPOLONATO)COPPER(II).

Crystal structures of 5‑cyano‑2‑(4‑octyloxybenzoylamino)tropone (1) and bis(5‑dodecyltropolonato)copper(II) (2) were elucidated by single‑crystal X‑ray analysis. The cya-notropone derivative 1 forms centrosymmetric dimers through intermolecular C-H···N interac-tions, and its 2‑(benzoylamino)tropone core adopts an almost planar conformation. Molecules of 1 assemble into a tilted layered structure via C-H···N, C-H···O, and π-π interactions. Complex 2 forms a 2:1 tropolonato-Cu(II) coordination unit with a tetragonally planar geometry, in which the Cu(II) ion lies on an inversion center and is coordinated by four oxygen atoms from two tropolonato ligands. The bis(tropolonato)copper(II) core is essentially planar, whereas the dodecyl chain adopts an all‑trans zigzag conformation, giving the molecule a subtly S‑shaped structure. Com-pound 2 also forms a tilted layered structure through intermolecular C-H···O and π-π interac-tions.