title: Naphthalene-1,8-di-amine-2-(pyrimidin-2-yl)-1H-perimidine (2/1).
abstract: In the title adduct, C15H10N4·2C10H10N2, the pyrimidine ring is nearly co-planar with the heteroatomic perimidine ring, as indicated dihedral angle between their mean planes of 3.21 (11)°. The di-aminona-phthalene mol-ecules are slightly twisted [dihedral angles = 4.2 (2) and 3.0 (2)°] because of the steric encumbrance of NH2 groups. The perimidine and di-aminona-phthalene mol-ecules are linked by N-H⋯N hydrogen bonds, forming an R (4) 4(12) graph-set motif across an inversion center. In the crystal, alternating layers of the perimidine and di-aminona-phthalene mol-ecules are formed along [100]. In the perimidine layer, mol-ecules are π-π stacked along the c-axis direction with an inter-plane separation of approximately 3.4 Å.
authors.affiliation: Dipartimento di Scienze Chimiche, Università degli Studi di Napoli 'Federico II', Complesso di Monte S. Angelo, Via Cinthia, 80126 Napoli, Italy.
authors.forename: Maria Elena
authors.initials: ME
authors.lastname: Cucciolito
authors.forename: Barbara
authors.initials: B
authors.lastname: Panunzi
authors.forename: Francesco
authors.initials: F
authors.lastname: Ruffo
authors.forename: Angela
authors.initials: A
authors.lastname: Tuzi
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2013 Apr 05;69(Pt 5):o667-8
references.pmid: 23723829
references.citation: Org Lett. 2010 Feb 19;12(4):856-9
references.pmid: 20104900
references.citation: Carbohydr Res. 2011 Jan 3;346(1):43-9
references.pmid: 21078510
references.citation: Acta Crystallogr C. 2001 Jul;57(Pt 7):870-2
references.pmid: 11443271
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2013 Apr 27;69(Pt 5):o802-3
references.pmid: 23723943