UV-vis, IR and H-1 NMR spectroscopic studies of some mono- and bis-azo-compounds based on 2,7-dihydroxynaphthalene and aniline derivatives

Issa RM; Fayed TA; Awad MK; El-Kony SM

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UV-vis, IR and H-1 NMR spectroscopic studies of some mono- and bis-azo-compounds based on 2,7-dihydroxynaphthalene and aniline derivatives

机译：基于2,7-二羟基萘和苯胺衍生物的一些单-和双-偶氮化合物的UV-vis，IR和H-1 NMR光谱研究

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The absorption spectra of mono- and bis-azo-derivatives obtained by coupling the diazonium salts of aromatic amines and 2,7dihydroxynaphthalene have been studied in six organic solvents. The different absorption bands have been assigned and the effect of solvents on the charge transfer band is also discussed. The diagnostic IR spectral bands and H-1 NMR signals are assigned and discussed in relation to molecular structure. Also, semi-empirical molecular orbital calculations using the atom superposition and electron delocalization molecular orbital (ASED-MO) theory have been performed to investigate the molecular and electronic structures of these compounds. According to these calculations, an intramolecular hydrogen bonding is essential for stabilization of such molecules. (c) 2005 Elsevier B.V. All rights reserved.

机译：通过在六种有机溶剂中研究了通过偶合芳族胺的重氮盐和2,7二羟基萘获得的单-和双-偶氮衍生物的吸收光谱。分配了不同的吸收带，并讨论了溶剂对电荷转移带的影响。诊断性IR谱带和H-1 NMR信号已被分配和讨论，与分子结构有关。此外，已经进行了使用原子叠加和电子离域分子轨道（ASED-MO）理论的半经验分子轨道计算，以研究这些化合物的分子和电子结构。根据这些计算，分子内氢键对于稳定这种分子是必不可少的。（c）2005 Elsevier B.V.保留所有权利。

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《Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy》 |2005年第5期|共7页
作者
Issa RM; Fayed TA; Awad MK; El-Kony SM;
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正文语种 eng
中图分类分析化学;
关键词
azo-derivatives; dihydroxynaphthalene; charge transfer; semi-empirical; ASED-MO; MOLECULAR-ORBITAL THEORY; SPECTRA; ACID; BETA;

机译：偶氮衍生物;二羟基萘;电荷转移;半经验;ASED-MO;分子轨道理论;光谱;酸;BETA;

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UV-vis, IR and H-1 NMR spectroscopic studies of some mono- and bis-azo-compounds based on 2,7-dihydroxynaphthalene and aniline derivatives

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