5-碘尿嘧啶的重新测定
Redetermination of 5-iodo-uracil.
作者信息
Portalone Gustavo
机构信息
Chemistry Department, 'Sapienza' University of Rome, P. le A. Moro, 5, I-00185 Rome, Italy.
出版信息
Acta Crystallogr Sect E Struct Rep Online. 2008 Jan 4;64(Pt 2):o365. doi: 10.1107/S1600536807068043.
2,4-dihydr-oxy-5-iodo-pyrimidine), C(4)H(3)IN(2)O(2), which was first reported by Sternglanz, Freeman & Bugg [Acta Cryst. (1975 ▶), B31, 1393-1395], has been redetermined, providing a significant increase in the precision of the derived geometric parameters. The asymmetric unit comprises a non-planar mol-ecule in a slightly distorted B(25) boat conformation. The mol-ecules are associated in the crystal structure to form ribbons stabilized by N-H⋯O hydrogen bonds which involve NH groups and two carbonyl O atoms.
2,4-二羟基-5-碘嘧啶（C₄H₃IN₂O₂），最初由斯特恩格兰茨、弗里曼和巴格报道[《晶体学报》（1975年▶），B31，1393 - 1395]，现已重新测定，使得推导的几何参数精度显著提高。不对称单元包含一个处于轻微扭曲的B(25)船式构象的非平面分子。分子在晶体结构中通过N - H⋯O氢键缔合形成带状结构，该氢键涉及NH基团和两个羰基O原子。
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