Crystal structure of dimethyl 1-oxo-2,4-di­phenyl-1,2-dihydronaphthalene-2,3-di­carboxyl­ate

In the title compound, C(26)H(20)O(5), a 1,2-di­hydro­naphthalene derivative, the cyclo­hexa-1,3-diene ring of the 1,2-di­hydro­naphthalene ring system adopts a half-chair conformation. The mean plane of the 1,2-di­hydro­napthalene ring system makes dihedral angles of 86.23 (6) and 64.80 (7)° with two phenyl rings. The carbonyl O atom attached to the di­hydro­naphthalene ring system deviates from the mean plane of the 1,2-di­hydro­naphthalene ring system by 0.618 (1) Å. In the crystal, the mol­ecules are linked into layers parallel to the bc plane via two kinds of C—H⋯O inter­actions, one of which forms a C(10) chain motif running along the c-axis direction and the other forms an R (2) (2)(6) ring motif. Adjacent layers are further connected by C—H⋯π and offset π–π inter­actions [centroid–centroid distance = 3.6318 (9) Å].