Synthesis, spectral and single crystal X-ray characterization of 5-(2-(2,3-dimethyl-5-oxo-1-phenyl-2,5-dihydro-1H-pyrazol-4-yl)hydrazono)pyrimidine-2,4,6(1H,3H,5H)-trione and its copper(II) complexes

被引：7
|
作者：
Biju, S. [1 ]
Kumar, Shubha S. [1 ]
Sadasivan, V. [1 ]
机构：
[1] Univ Coll, MG Rd, Thiruvananthapuram 695034, Kerala, India
来源：
POLYHEDRON | 2018年 / 144卷
关键词：
Barbituric acid; Azo-hydrazone tautomerism; Crystal structure; ESR spectrum; AZO-HYDRAZONE TAUTOMERISM; TRANSITION-METAL-COMPLEXES; STRUCTURAL-CHARACTERIZATION; SPECTROSCOPIC PROPERTIES; BARBITURIC-ACID; DNA CLEAVAGE; ARYLHYDRAZONES; DERIVATIVES; EQUILIBRIUM; LIGANDS;
D O I：
10.1016/j.poly.2018.01.019
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A novel aryl hydrazone was synthesized via Japp-Klingemann reaction between diazotized 4-aminoantipyrine and barbituric acid. It has characterized by various spectroscopic methods and X-ray single crystal analysis. The effect of pH on the azo-hydrazone tautomerism of the ligand has been studied with UV-Vis spectroscopy. Two types of copper complexes were obtained by the reaction of the ligand with copper sulphate pentahydrate in methanol under different experimental conditions. In one complex, sulfate ion acts only as the counter anion and in the other complex it is coordinated unidentately to the metal ion in the form of bisulphate anion. The complexes were also characterized spectroscopically and by single crystal X-ray analysis. The complexes exhibited distorted square pyramidal geometry. The ESR spectrum of one of the complex was also discussed. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：210 / 218
页数：9
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