Thanigaimani Kaliyaperumal, Khalib Nuridayanti Che, Arshad Suhana, Razak Ibrahim Abdul
School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
Acta Crystallogr Sect E Struct Rep Online. 2012 Dec 1;68(Pt 12):o3444-5. doi: 10.1107/S1600536812047642. Epub 2012 Nov 24.
In the 4-meth-oxy-quinoline-2-carboxyl-ate anion of the title salt, C5H8N3(+)·C11H8NO3(-), the dihedral angle between the quinoline ring system and the carboxyl-ate group is 16.54 (15)°. In the crystal, the cations and anions are linked via N-H⋯O and N-H⋯N hydrogen bonds, forming a centrosymmetric 2 + 2 aggregate with R2(2)(9) and R4(2)(8) ring motifs. These units are further connected via N-H⋯O hydrogen bonds into a layer parallel to the bc plane. The crystal structure is also stabilized by weak C-H⋯O hydrogen bonds and π-π inter-actions between pyridine rings [centroid-centroid distance = 3.5886 (8) Å] and between pyridine and benzene rings [centroid-centroid distance = 3.6328 (8) Å].
在标题盐C5H8N3(+)·C11H8NO3(-)的4-甲氧基喹啉-2-羧酸根阴离子中，喹啉环系与羧酸根基团之间的二面角为16.54 (15)°。在晶体中，阳离子和阴离子通过N-H⋯O和N-H⋯N氢键相连，形成具有R2(2)(9)和R4(2)(8)环模式的中心对称2 + 2聚集体。这些单元通过N-H⋯O氢键进一步连接成平行于bc平面的层。晶体结构还通过弱C-H⋯O氢键以及吡啶环之间[质心-质心距离 = 3.5886 (8) Å]和吡啶与苯环之间[质心-质心距离 = 3.6328 (8) Å]的π-π相互作用得以稳定。
