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Application of the ECM to 1,1′‐binaphthyls (2). (A,B) Diagram and ECD spectrum of (aR)‐2,2′‐bis(chloromethyl)‐1,1′‐binaphthalene (R = CH2Cl, acetonitrile) showing a negative exciton couplet in the region of the long‐axis transition. (C) Chirality defined by the two transition dipoles: A negative chirality (and couplet) is found for (aR) axial chirality
