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内消旋-3,6-二氧代哌嗪-2,5-二乙酰胺

meso-3,6-Dioxopiperazine-2,5-diacet-amide.

作者信息

Li Ping, Zhang Chun, Xu Wei

机构信息

Center of Applied Solid State Chemistry Research, Ningbo University, Ningbo, Zhejiang 315211, People's Republic of China.

出版信息

Acta Crystallogr Sect E Struct Rep Online. 2011 Nov;67(Pt 11):o3041. doi: 10.1107/S1600536811043376. Epub 2011 Oct 29.

Abstract

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.

摘要

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。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3638/3247435/5c112e0a365e/e-67-o3041-fig1.jpg

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本文引用的文献

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2
dl-Asparaginium nitrate.dl-硝酸天冬酰胺
Acta Crystallogr Sect E Struct Rep Online. 2009 Aug 19;65(Pt 9):o2180-1. doi: 10.1107/S1600536809031730.
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A short history of SHELX.SHELX简史。
Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22. doi: 10.1107/S0108767307043930. Epub 2007 Dec 21.

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