Li Ping, Zhang Chun, Xu Wei
Center of Applied Solid State Chemistry Research, Ningbo University, Ningbo, Zhejiang 315211, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2011 Nov;67(Pt 11):o3041. doi: 10.1107/S1600536811043376. Epub 2011 Oct 29.
The title compound, C(8)H(12)N(4)O(4), was obtained by cyclization of the two l-asparagine mol-ecules and reveals a crystallographic inversion symmetry, and accordingly the two stereogenic centres are of opposite chirality. Thus, an asymmetric unit comprises a half of a mol-ecule. The mol-ecules are assembled into a three-dimensional hydrogen-bonding network by N-H⋯O hydrogen bonds.
标题化合物C(8)H(12)N(4)O(4)是由两个L-天冬酰胺分子环化得到的,具有晶体学反演对称性,因此两个手性中心具有相反的手性。所以,一个不对称单元包含半个分子。分子通过N-H⋯O氢键组装成三维氢键网络。