title: 4-(9-Anthr-yl)-1-(2-methoxy-phen-yl)spiro-[azetidin-3,9'-xanthen]-2-one.
abstract: The stabilized conformation of the title compound, C(36)H(25)NO(3), 4-(9-anthryl)-1-(2-methoxyphenyl)-spiro[azetid-in-3,9'-xanthen]-2-one, may be compared with that of the isomeric compound 4-(9-anthr-yl)-1-(4-methoxy-phen-yl)spiro-[azetidin-3,9'-xanthen]-2-one. In the title isomer, the meth-oxy group is slightly twisted out of the plane of the attached benzene ring, with a C-O-C-C torsion angle of 31.5 (2)°. Its β-lactam ring is essentially planar, with a maximum deviation of -0.021 (1) Å. The β-lactam ring makes dihedral angles of 18.815 (9), 83.33 (7) and 53.62 (8)° with the mean planes of the benzene, xanthene and anthracene ring systems, respectively. The structure is stabilized by C-H⋯π, C-H⋯N and C-H⋯O inter-actions.
authors.forename: Serife Pınar
authors.initials: SP
authors.lastname: Yalçın
authors.forename: Mehmet
authors.initials: M
authors.lastname: Akkurt
authors.forename: Aliasghar
authors.initials: A
authors.lastname: Jarrahpour
authors.forename: Edris
authors.initials: E
authors.lastname: Ebrahimi
authors.forename: Orhan
authors.initials: O
authors.lastname: Büyükgüngör