(R)-Di-tert-butyl 1,1′-binaphthyl-2,2′-dicarboxyl­ate

The crystal structure of the title compound, C(30)H(30)O(4), comprises two crystallographically independent half-mol­ecules which are completed by crystallographic twofold symmetry. The dihedral angles between the naphthalene ring planes are 85.83 (3) and 83.69 (3)° for the two molecules. The atoms of the tert-butyl group of one mol­ecule are disordered over two sets of sites with occupancies of 0.60:0.40. The crystal packing is achieved via π–π stacking inter­actions between the naphthyl groups of adjacent mol­ecules, with a separation of 3.790 (1) Å between the centroids of the rings.