Crystal Structure of a Co-crystalline Compound from of 2-Aminopyrimidine and Pyridine-2,6-dicarboxylic acid
Volume Title: 1
Department of Chemistry, Yazd Branch, Islamic Azad University, Yazd, Iran
The addition of 2-aminopyrimidine (amp) and pyridine-2,6-dicarboxylic acid (pydcH2) in water solution led to co-crystalline compound (amp)(pydcH2). The compound crystallized in a Orthorhombic system, space group Pmn21 with cell parameters at -173 C°: a = 11.550(2), b = 12.324(3), c = 3.6057(7), V= 513.25(18)
Å3, Z = 1. The R1 [I 2(I)] and wR2 values are 0.0365 and 0.0856, respectively, for all 612 independent reflections. Crystal structure of (amp)(pydcH2) was stabilized by hydrogen bonds, π-π stacking between aromatic rings and van der Waals interactions.
Keywords: co-crystalline compound, 2-aminopyrimidine, pyridine - 2,6dicarboxylic acid, Crystal structure

Co-crystals, referred to multi-component crystals, include two or more different compounds which are bound to each other by non-covalent bonds. Hydrogen bonds play an important role in adducting neutral molecules [1]. Bronsted acids can be used as proton-donors in hydrogen- bonded systems for preparing co- crystals, without the transfer of hydrogen ions to form salts