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Models for the complex of cyclohex‐2‐enone‐3‐carboxylic acid (12) with chiral phosphoric acid 4: Rotatable single bonds influencing the reactive conformation (left), optimized structure of a 1:1 complex in which the Si face at the α‐carbon atom of acid 12 is accessible (right). DFT calculations were performed using the M06‐2X functional24 with the def2‐TZVP25 basis set for all atoms employing Gaussian0926 with D3 dispersion27 and low‐frequency entropy28 corrections by Grimme.
