4-(4-Chlorobenzylidenehydrazonomethyl)benzonitrile and the bromo and iodo analogs.
4-Cyano-4'-chlorobenzalazine [systematic name: 4-(4-chlorobenzylidenehydrazonomethyl)benzonitrile], C(15)H(10)ClN(3), occurs in two polymorphs. Polymorph A is isostructural with the corresponding dichloro compound. Polymorph B is isostructural with the bromo and iodo analogs, viz. C(15)H(10)BrN(3) and C(15)H(10)IN(3), respectively. The latter three structures all have approximately linear C-N...X-C intermolecular contacts in which the N...X contact distances are longer than those in the corresponding benzylideneanilines.
Ojala
Charles R
CR
Department of Chemistry, Normandale Community College, Bloomington, MN 55431, USA.
Ojala
William H
WH
Britton
Doyle
D