{2-[(9,9-Dihexyl-fluoren-2-yl)carbon-yl]phen-yl}(4-meth-oxy-phen-yl)methanone

Abstract

In the title compound, C(40)H(44)O(3), the fluorene ring system is essentially planar, with a maximum deviation of 0.075 (3) Å, and forms dihedral angles of 70.62 (8) and 70.31 (8)° with the mean planes of the central benzene ring and the meth-oxy-phenyl ring, respectively. Both the hexyl side chains have different conformations, i.e. an anti-gauche-anti-gauche conformation with C-C-C-C torsion angles of -169.3 (2), 74.2 (4), -178.0 (3) and -76.0 (6)° for one hexyl side chain and an anti-anti-anti-gauche conformation with C-C-C-C torsion angles of -177.9 (2), -176.5 (3), 171.7 (4) and 80.4 (9)° for the other. Four C atoms in one and two C atoms in the other hexyl side chains are each disordered over two sets of sites, with occupancy factors of 0.761 (3):0.239 (3) and 0.660 (6):0.340 (6). In the crystal, mol-ecules are via pairs of C-H⋯O hydrogen bonds, forming inversion dimers and resulting in R(2) (2)(28) graph-set motifs.

Fig. 1.

The molecular structure of the title compound showing only the atoms representing major fractions of the disordered dihexyl side chains, with the atom numbering scheme. The displacement ellipsoids are drawn at 30% probability level.

Fig. 2.

The crystal packing of the title compound, viewed down the a-axis, showing the centrosymmetric dimer via C—H···O hydrogen bonds. The dihexyl side chains and H atoms not involved in hydrogen bonding have been excluded for clarity.