4-(9-Anthr-yl)-1-(4-methoxy-phen-yl)spiro-[azetidin-3,9′-xanthen] -2-one

Abstract

In the title mol-ecule, C36H25NO3, the Β-lactam ring is essentially planar, with a dihedral angle of 3.3 (2)° between the two separate three-atom N/C/C planes. The Β-lactam ring makes dihedral angles of 28.45 (14), 87.4 (1) and 51.8 (1)° with the mean planes of the benzene, xanthene and anthracene ring systems, respectively. In addition to a weak intra-molecular C - H⋯N hydrogen bond, the crystal structure is stabilized by two weak inter-molecular C - H⋯O hydrogen bonds.