Fig. 1: Structural information of BINAP in crystal.

a Molecular structure of rac-BINAP (left), R- (central) and S-BINAP (right) in crystal. b Molecular packing of BINAP in different configurations from left (rac-BINAP), central (R-BINAP), and right (S-BINAP) in a crystal unit cell. c Intermolecular interactions of single molecule with adjacent ones from left (rac-BINAP), central (R-BINAP), and right (S-BINAP).