RESUMO
The mol-ecular title compound, C20H22O6, was obtained by the reaction of ethyl 2-hy-droxy-benzoate with 1,2-di-chloro-ethane. The mol-ecule lies on a twofold rotation axis which passes through the middle of the central ethyl-ene bridge. This group exhibits a gauche conformation with the corresponding O-C-C-O torsion angle being 73.2â (2)°. The C atoms of the carboxyl group, the aryl and the O-CH2 group are coplanar, with an r.m.s. deviation of 0.01â Å. The two aryl rings form a dihedral angle of 67.94â (4)°. The ester ethyl group is disordered over two sets of sites with an occupancy ratio of 0.59â (2):0.41â (2). The crystal packing is dominated by van der Waals forces.
RESUMO
The title compound, C(24)H(30)O(8), was obtained by reaction of ethyl 4-hy-droxy-benzoate with 1,2-dichloro-ethane. The mol-ecule occupies a crystallographic inversion center, with its central ethyl-ene bridge in an anti conformation. The other ethyl-ene bridge has a gauche conformation, with the corresponding O-C-C-O torsion angle being 74.2â (1)°. The benzene rings are almost coplanar with the adjacent eth-oxy-carbonyl groups, with an r.m.s. deviation of 0.078â Å.