The salt of l-prolinium picrate by Zhi Min Jin, Yuan Jiang Pan, Mao Lin Hu, Liang Shen, and Mei Chao Li

Crystal Research and Technology

Cryst. Res. Technol. 38, 1009 (2003) - Abstract -

The salt of l-prolinium picrate

Zhi Min Jin, Yuan Jiang Pan*, Mao Lin Hu**, Liang Shen***, and Mei Chao Li****

College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
*Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
**Department of Chemistry, Wenzhou Normal College, Wenzhou, Zhejiang 325003, P. R. China
***Department of Chemistry, Hangzhou Teacher College, Hangzhou 310012, P. R. China
****College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China

Keywords	proline, picric acid, bifurcated hydrogen bonding, CH---O hydrogen bond, pi-pi stacking
PACS	61.66.Hq
DOI	10.1002/crat.200310129

A crystalline salt of prolinium picrate, C₁₁H₁₂N₄O₉, has been prepared and characterized by X-ray crystallography. The salt crystallizes in orthorhombic space group P2₁2₁2₁ with a = 6.325(1)Å, b = 9.269(1)Å, c = 24.379(4)Å, V = 1429.4(5)Å³, Z = 4. In the title salt, the picrate and prolinium ion are held by different bifurcated hydrogen bonds of N-H---O type, and stablized by bifurcated hydrogen bonds of CH---O type. There exists a competion between hydrogen bonds and pi-pi stacking in determining the title crystal.

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