title: Bis(2-amino-4-methyl-pyridinium) terephthalate tetra-hydrate.
abstract: In the crystal structure of the title salt, 2C(6)H(9)N(2) (+)·C(8)H(4)O(4) (2-)·4H(2)O, the terephthalate carboxyl-ate groups inter-acts with the 2-amino-4-methyl-pyridinium cations via a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) ring motif. The water mol-ecules form an R(6) (6)(12) ring motif through O-H⋯O hydrogen bonds and these motifs are fused, forming a supra-molecular chain along the c axis. The R(2) (2)(8) and R(6) (6)(12) ring motifs are connected via O-H⋯O hydrogen bonds. In addition, π-π stacking inter-actions are observed between the pyridinium rings [centroid-centroid distance = 3.522 (12) Å].
authors: X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors: Madhukar
authors: M
authors: Hemamalini
authors: Hoong-Kun
authors: HK
authors: Fun
references: Nature. 2004 Sep 16;431(7006):287-90
references: 15372027
references: Science. 2007 Mar 30;315(5820):1828-31
references: 17395825
references: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references: 19171970
references: Acta Crystallogr C. 2000 Jun 1;56(Pt 6):E240-1
references: 15263109
references: Acta Crystallogr B. 2004 Dec;60(Pt 6):748-54
references: 15534386
references: Acta Crystallogr C. 2004 Nov;60(Pt 11):o839-42
references: 15528837
references: J Am Chem Soc. 2004 Mar 3;126(8):2464-73
references: 14982455
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Angew Chem Int Ed Engl. 2007;46(44):8342-56
references: 17902079