Arman Hadi D, Poplaukhin Pavel, Tiekink Edward R T
Acta Crystallogr Sect E Struct Rep Online. 2009 Nov 25;65(Pt 12):o3187. doi: 10.1107/S1600536809049496.
The asymmetric unit in the title compound, C(5)H(5)NO, comprises two independent but virtually identical mol-ecules of 2-pyridone, and represents a monoclinic polymorph of the previously reported ortho-rhom-bic (P2(1)2(1)2(1)) form [Penfold (1953 ▶). Acta Cryst.6, 591-600; Ohms et al. (1984 ▶). Z. Kristallogr.169, 185-200; Yang & Craven (1998 ▶). Acta Cryst. B54, 912-920]. The independent mol-ecules are linked into supra-molecular dimers via eight-membered {⋯HNC(O)}(2) amide synthons in contrast to the helical supra-molecular chains, mediated by {⋯HNC(O)} links, found in the ortho-rhom-bic form.
标题化合物C(5)H(5)NO的不对称单元由两个独立但几乎相同的2-吡啶酮分子组成，代表了先前报道的正交晶系（P2(1)2(1)2(1)）形式的单斜晶系多晶型物[彭福尔德（1953年▶）。《晶体学报》6，591 - 600；欧姆等人（1984年▶）。《晶体学报》169，185 - 200；杨和克雷文（1998年▶）。《晶体学报》B54，912 - 920]。与在正交晶系形式中发现的由{⋯HNC(O)}连接介导的螺旋超分子链相反，独立分子通过八元{⋯HNC(O)}(2)酰胺合成子连接成超分子二聚体。
