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Structural, spectroscopic, and theoretical analysis of a molecular system based on 2-((2-(4- chlorophenylhydrazone)methyl)quinolone 

Romero, Elkin L.; Soto-Monsalve, Mónica; Gutiérrez, Gustavo; Zuluaga, Fabio; D'Vries, Richard F.; Chaur, Manuel N. (Universidad Nacional de Colombia, 2018-12-02)
A novel molecular system based on 2-((2-(4-chlorophenylhydrazone)methyl)quinoline (1-E) was synthesized. Interconversion of 1-E to its configurational isomer 1-Z was achieved using UV radiation (250 W Hg lamp). Such ...
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(E)-5-[1-Hydroxy-3-(3,4,5-trimethoxyphenyl)allylidene]-1,3-dimethylpyrimidine-2,4,6-trione: Crystal structure and Hirshfeld surface analysis 

Soto-Monsalve, Mónica; Romero, Elkin L.; Zuluaga, Fabio; Chaur, Manuel N.; D'Vries, Richard F. (International Union of Crystallography, 2017-07-13)
In the title compound, C18H20N2O7, the dihedral angle between the aromatic rings is 7.28 (7)° and the almost planar conformation of the molecule is supported by an intramolecular O - H⋯O hydrogen bond, which closes an S(6) ...
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When serendipity knocks on the door: Synthesis and Physicochemical Characterization of 7-Chloro-2,3-dihydro-5H-thiazolo[3,2-a]pyrimidin-5-one 

Carmona-Vargas, Christian C.; Ellena, Javier; D’Vries, Richard F.; Chaur, Manuel N. (Sociedade Brasileira de Quimica, 2019-03-19)
Herein, we present the serendipitous obtaining of 7-chloro-2,3-dihydro-5H-thiazolo [3,2-a]pyrimidin-5-one in 40% yield by using POCl3 and a thiobarbituric acid derivative. The thiazolopyrimidine derivative was characterized ...
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Determination of the binding constants of propeller-like metal complexes of picolinaldehyde-2-pyridylhydrazone 

Carmona Vargas, Christian C.; Aristizábal, Sandra L.; Belalcázar, María I.; D'Vries, Richard F.; Chaur, Manuel N. (Elsevier S.A., 2018-12-13)
Herein, we determined the binding constants for transition metal complexes of Cu2+, Co2+, Fe2+, Ni2+, and Zn2+ ions formed with the ligand picolinaldehyde-2-pyridylhydrazone (PapyH) using the Benesi-Hildebrand method. ...
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Multiple Reversible Dynamics of Pyrimidine Based Acylhydrazones 

Arango, Alejandra M.; Wist, Julien; Ellena, Javier Alcides; D'Vries, Richard Fernando; Chaur, Manuel N. (Wiley-VCH Verlag, 2020-05-08)
We employed (Z)‐N'‐[phenyl(pyrimidin‐2‐yl)methylene]nicotinohydrazide (2) and (Z)‐4‐(dimethylamino)‐N'‐[phenyl(pyrimidin‐2‐yl)methylene]benzohydrazide (3) as cores of dynamic chemical systems whose different states are ...
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Synthesis, characterization, and redox potential properties of a new double-stranded Ni-bis(hydrazone)-based helicate 

Villada, Juan D.; Carmona Vargas, Christian C.; Alcides Ellena, Javier; Ayala, Alejandro P.; Ramírez Pradilla, Juan S.; Combariza, M. Y.; Galarza, Esperanza; D'Vries, Richard Fernando; Chaur, Manuel N. (Academic Press Inc., 2020-08-25)
Herein we report the synthesis and structural characterization of a new Ni-bis(hydrazone) complex with the chemical formula [Ni2(L)2(Cl)2](Cl)2·2H2O (L ​= ​2-(heptylthio)-4,6-bis(2-((E)-pyridin-2-ylmethylene)hydrazineyl) ...

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Chaur, Manuel N. (6)
D'Vries, Richard F. (3)Carmona Vargas, Christian C. (2)D'Vries, Richard Fernando (2)Romero, Elkin L. (2)Soto-Monsalve, Mónica (2)Zuluaga, Fabio (2)Alcides Ellena, Javier (1)Arango, Alejandra M. (1)Aristizábal, Sandra L. (1)... View MoreSubjectAcylhydrazone (1)allylidene (1)Benesi-Hildebrand method (1)Binding constants (1)Bis(hydrazones) (1)Catalyzed hydrogen reduction (1)Chlorination (1)Configurational dynamic (1)Configurational isomerization (1)Conformational isomerism (1)... View MoreDate Issued2018 (2)2020 (2)2017 (1)2019 (1)Has File(s)
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