Crystal structure of a second polymorph of tetra-kis-(pyridin-2-yl)methane.

IF 0.9

Acta crystallographica. Section E, Structure reports online Pub Date : 2014-11-21 eCollection Date: 2014-12-01 DOI:10.1107/S1600536814025057

Kouzou Matsumoto, Masaki Kannami, Akira Fuyuhiro, Masaji Oda

引用次数: 1

Abstract

A second polymorph of the title compound, C21H16N4, is reported. The original polymorph was solved by our group [Matsumoto et al. (2003 ▶). Tetra-hedron Lett. 44, 2861-2864] in the monoclinic space group C2/c and refined to R = 0.050. Now the crystal structure of a tetra-gonal polymorph (space group P-421 c) has been solved and refined to R = 0.036. In the crystal, there are no strong inter-molecular inter-actions. Reflecting the high symmetry of the mol-ecular structure, the asymmetric unit is a quarter of the mol-ecule, and the mol-ecule exhibits S4 symmetry along the c axis in the crystal.

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四基-(吡啶-2-基)甲烷第二多晶型的晶体结构。

报道了标题化合物C21H16N4的第二多晶型。我们的团队[Matsumoto et al.(2003▶)]解决了原始的多晶型。四面体Lett. 44, 2861-2864]在单斜空间群C2/c中，精炼到R = 0.050。求解了四角形多晶(空间群p - 421c)的晶体结构，并将其细化为R = 0.036。在晶体中，没有强烈的分子间相互作用。不对称单元为分子的四分之一，分子在晶体中沿c轴呈S4对称，反映了分子结构的高度对称性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta crystallographica. Section E, Structure reports online 化学-晶体学

自引率

33.30%

发文量

审稿时长

1.3 months

期刊介绍： Acta Crystallographica Section E: Structure Reports Online is the IUCr highly popular open-access structural journal. It provides a simple and easily accessible publication mechanism for the growing number of inorganic, metal-organic and organic crystal structure determinations. The electronic submission, validation, refereeing and publication facilities of the journal ensure very rapid and high-quality publication, whilst key indicators and validation reports provide measures of structural reliability. In 2009, the journal published over 4000 structures. The average publication time is less than one month.