title: 2,2'-Bi[6,6'-dimethyl-dibenzo[d,f][1,3]dioxepine].
abstract: The title compound, C(30)H(26)O(4), is a dimer of 6,6'-dimethyl-dibenzo[d,f][1,3]dioxepine linked by formation of a C-C bond in the para position with respect to one O atom. The dimer is arranged around an inversion centre. As is usually observed in related compounds, the dibenzo group is twisted, the two benzene rings making a dihedral angle of 41.56 (9)°. The seven-membered ring exhibits a twisted conformation.
authors.forename: Hai-Quan
authors.initials: HQ
authors.lastname: Zhang
authors.lastname: Bao-Li
authors.forename: Guang-Di
authors.initials: GD
authors.lastname: Yang
authors.forename: Yu-Guang
authors.initials: YG
authors.lastname: Ma