Crystal structure, IR-LD spectroscopic, theoretical and vibrational analysis of valinamide ester amide of squaric acid diethyl ester

被引：0
|
作者：
Tsonko Kolev
Bojidarka B. Koleva
Emiliya Cherneva
Michael Spiteller
Manuela V. Winter
William S. Sheldrick
Heike Mayer-Figge
机构：
[1] Bulgarian Academy of Sciences,Institute of Organic Chemistry
[2] Faculty of Chemistry,Department of Organic Chemistry
[3] Plovdiv University “P. Hilendarski”,Department of Analytical Chemistry
[4] Faculty of Chemistry,Institut für Umweltforschung
[5] Sofia University “St. Kl. Ohridsky”,Lehrstuhl für Anorganische Chemie II
[6] Universität Dortmund,undefined
[7] Ruhr-Universität Bochum,undefined
来源：
Structural Chemistry | 2006年 / 17卷
关键词：
Valinamide ester amide of squaric acid diethyl ester; Crystal structure; Vibrational analysis; IR-LD spectroscopy;
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中图分类号：
学科分类号：
摘要：
Valinamide ester amide of squaric acid has been synthesized and structurally characterized by single crystal X-ray diffraction. Individual molecules are linked into zig-zag helix chains running parallel to [0 1 0] by N–H ⋯ O hydrogen bonds of length 2.7908(19) Å and 2.980(2) Å involving the valinamide nitrogen atoms and the amide carbonyl oxygen atom. An experimental IR spectroscopic characterization and theoretical vibrational analysis have also been performed, using the possibilities of polarized linear-dichroic IR-spectroscopy (IR-LD), based on an orientation technique of the molecules as a suspension in a nematic liquid crystal.
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页码：491 / 499
页数：8
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