Abstract

The crystal structures of N,N'-(1,2-phenylene)bis(pyridine-2carboxamide), C 18 H 14 N 4 O 2 , (I), and N,N'-(1,2-cyclohexane-diyl)bis(pyridine-2-carboxamide) have been determined, the latter compound as the toluene hemisolvate, C 18 H 20 N 4 O 2 .0.5C 7 H 8 , (II). In (I), the benzene ring is nearly coplanar with one of the pyridine rings and forms a dihedral angle of 59.4 (1)° with the other. However, in (II), the dihedral angle of the two pyridine rings is 70.0 (1)°.

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