title: 2-(4-{4-[4-(Oxiran-2-ylmeth-oxy)phen-oxy]phen-yl}phen-oxy-meth-yl)oxirane.
abstract: In the title ep-oxy monomer, C(24)H(22)O(5), the dihedral angle in the biphenyl residue is 3.34 (19)°, indicating a nearly coplanar conformation; this residue is not planar with the adjacent benzene ring [dihedral angle = 58.93 (14)°]. Each of the epoxide rings is disordered. Each epoxide ring was resolved over two alternative positions with site-occupancy ratios of 0.638 (10):0.362 (10) and 0.797 (9):0.203 (9).
authors.affiliation: Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190,  People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Song
authors.forename: Jin-Gang
authors.initials: JG
authors.lastname: Liu
authors.forename: Shi-Yong
authors.initials: SY
authors.lastname: Yang