Abstract
The title compounds are diastereoisomers with antipodean axial chirality. The M isomer crystallizes as a (1/3) acetone solvate, C(32)H(30)NO(+).Br(-).3C(3)H(6)O, while the P isomer crystallizes as a (1/1) dichloromethane solvate, C(32)H(30)NO(+).Br(-).CH(2)Cl(2). In each structure, O-H.Br hydrogen bonds link the cations and anions to give ion pairs. The seven-membered azepinium ring adopts the usual twisted-boat conformation and its ring strain causes a slight curvature of the plane of each naphthyl ring.
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