Jovita Josephine Viavulamary, Sathya Shanmugam, Usha Govindasamy, Vasanthi Ramachandran, Ezhilarasi Krishnan Sarada
Postgraduate and Research Department of Physics, Queen Mary's College, Chennai-4, Tamilnadu, India.
Acta Crystallogr Sect E Struct Rep Online. 2013 May 11;69(Pt 6):o841-2. doi: 10.1107/S1600536813011896. Print 2013 Jun 1.
The title salt, C5H6N3O2 (+)·C2F3O2 (-), crystallizes with two cations and two anions in the asymmetric unit. In the crystal, the acetate and pyridine groups are linked by a pair of N-H⋯O hydrogen bonds, forming loops described by the graph-set motif R 2 (2)(8). These loops are linked via N-H⋯O hydrogen bonds, forming chains along [001]. The chains are in turn linked by C-H⋯O and C-H⋯F hydrogen bonds, generating a three-dimensional supra-molecular network. In both anions, the O and F atoms are disordered over two sites, with occupancy ratios of 0.852 (3):0.148 (3) and 0.851 (3):0.149 (3).
标题盐C5H6N3O2(+)·C2F3O2(-)在不对称单元中结晶，含有两个阳离子和两个阴离子。在晶体中，乙酸根和吡啶基团通过一对N-H⋯O氢键相连，形成由图形集 motif R 2(2)(8)描述的环。这些环通过N-H⋯O氢键相连，沿[001]方向形成链。这些链又通过C-H⋯O和C-H⋯F氢键相连，生成三维超分子网络。在两个阴离子中，O和F原子在两个位置上无序，占有率分别为0.852 (3):0.148 (3)和0.851 (3):0.149 (3)。
