Synthesis and Computational Studies of Molecular Structure and Vibrational Spectra of 2-Amino-4-(4-Nitrophenyl)-4H-Pyrano-[3,2-H]Quinolines

2019 ◽  
Vol 86 (4) ◽  
pp. 715-725
Author(s):  
P. Kour ◽  
A. Kumar ◽  
A. Uppal ◽  
Y. Khajuria ◽  
V. K. Singh
Keyword(s):  
Molecular Structure ◽  
Vibrational Spectra ◽  
Computational Studies

Synthesis, crystal and molecular structure, and vibrational spectra of the complex (COOH)2•2H2O•18-crown-6

1986 ◽  
Vol 64 (1) ◽  
pp. 142-147 ◽  
Author(s):  
Suzanne Deguire ◽  
François Brisse ◽  
Jacques Ouellet ◽  
Rodrigue Savoie
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bonds ◽  
Oxalic Acid ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Crystal And Molecular Structure ◽  
Unit Cell ◽  
Infrared And Raman Spectra ◽  
O 18 ◽  
Stoichiometric Complex

A stoichiometric complex of formula (COOH)2•2H2O•18-crown-6 has been obtained from oxalic acid and the macrocyclic polyether 18-crown-6. The crystals of the complex have a monoclinic unit cell and belong to the P21/c space group. The components in the adduct are linked through hydrogen bonds in a polymer-like fashion: -crown–H2O–HOOCCOOH–OH2–crown–, where the oxalic acid molecules are present in two distinct disordered orientations. The infrared and Raman spectra of the complex are also reported and interpreted.

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