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In the title compound, C28H21O4P, the eight-membered heterocyclic dioxaphosphocine ring has a distorted boat conformation, with the phosphoryl O atom axial and the phenoxy group equatorial. The P=O distance is 1.451 (1) Å and the average length of the three P-O bonds is 1.573 (1) Å. The phenyl ring is nearly perpendicular to both naphthalene planes, making dihedral angles of 91.30 (3) and 97.65 (5)° with them. The angle between the two naphthalene planes is 67.73 (3)°. The crystal structure is stabilized by van der Waals interactions.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks text, ha1100a

CCDC reference: 126545

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