Crystal structure of 1,1’-binaphthyl-2,2’-di(pyrid-2-ylamine), C30H22N4

N,N′-Bis(2-pyridyl)benzene-1,2-diamine

“…In this arrangement, the pyridine N atom, being a hydrogen-bond acceptor, is blocked by the intramolecular CÐHÁ Á ÁN interaction and thus the N-aryl-2-aminopyridine unit can act only as an NH donor in the intermolecular hydrogen bonding. Among symmetrical N,N H -bis(2-pyridyl)aryldiamines studied so far, E,E or Z,Z conformations have been observed, but the E,Z form has never been reported (Kempe & Hillebrand, 2000;Bensemann et al, 2002). We report here the crystal structure of N,N H -bis(2-pyridyl)benzene-1,2-diamine, (I), the ®rst example of this class of compounds that exists in the E,Z form in the crystalline state.…”