Año 2021
- M. Rocha, G. A. Echeverría, O. E. Piro, J. L. Jios, S. E. Ulic, D. M. Gil. Role of fluorine-fluorine and weak intermolecular interactions in the supramolecular network of a new trifluoromethyl-1,5-benzodiazepine: Crystal structure, Hirshfeld surface analysis and theoretical study. Journal of Fluorine Chemistry, 2021, 242, 109697. DOI: 10.1016/j.jfluchem.2020.109697
- J. E. Galván, O. E. Piro, G. Echeverria, R. D. I. Molina, M. E. Arena, E. Contreras Aguilar, S. E. Ulic, M. E. Tuttolomondo, A. Ben Altabef. Synthesis, characterization and crystal structure of bis-(methylsulfonylmethyl) sulfone, a symmetric acyclic trisulfone. Journal of Molecular Structure, 2021, 1230, 129655. DOI: 10.1016/j.molstruc.2020.129655
- E. G. Narváez O., P. M. Bonilla V., D. A.Zurita, C. D. Alcívar L., J. Heredia-Moya, S. E. Ulic, J. L. Jios, O. E.Piro, G. A. Echeverría, P. Langer. Synthesis, experimental and theoretical study of novel 2-haloalkyl (-CF2H, -CCl2H, -CF2CF3)-, 3-bromo and bromomethyl substituted chromones. Journal of Fluorine Chemistry, 2021, 242, 109717. DOI: 10.1016/j.jfluchem.2020.109717
- E. Espitia Cogollo, E. Jios, A. Hidalgo, S. E. Ulic, G. A. Echeverría, O. E. Piro, J. L. Jios. The Bonding Interactions in Fluorinated Vinylogous Amides: A CF3-Substituted Carbonyl-β-Aminoenone as a Case Study. Crystal Research and Technology, 2021, 56(2), 2000162. DOI: 10.1002/crat.202000162
Año 2020
- E. Espitia Cogollo, O. E. Piro, G. A. Echeverría, M. E. Tuttolomondo, H. Pérez, J. L. Jios, S. E. Ulic.
Hydrogen bonding interactions in fluorinated 1,2,3-triazole derivatives. New Journal of Chemistry, 2020, Advance Article. DOI: 10.1039/D0NJ02914A - W. Espinoza, P. Vargas Jentzsch, F. Gualpa, P. Andrade, C. Moreno, I. Vaca, R. Betancourt, L. Medina, D. Enríquez, M. Guijarro, P. Garrido, J. Bravo, S. Ulic, G. Montalvo García, F. Ortega, L. Stolker, L. Ramos.
Survey of clenbuterol in bovine muscle and liver in Ecuador. Food Additives & Contaminants: Part B: Surveillance, 2020, 13, 2, 107-114. DOI: 10.1080/19393210.2020.1735534 - M. Rocha, G. A. Echeverría, O. E. Piro, J. J. Jios, R. D. I. Molina, M. E. Arena, S. E. Ulic, D. M. Gil.
Synthesis, Structure, and Biological Assays of Novel Trifluoromethyldiazepine–Metal Complexes. Australian Journal of Chemistry, 2020, 73, 1, 49-60. DOI: 10.1071/CH19352
Año 2019
- E. Contreras Aguilar, G. A. Echeverría, O. E. Piro, S. E. Ulic, J. L. Jios, M. E. Tuttolomondo, R. D. I. Molina, M. E. Arena.
Acyl thiourea derivatives: A study of crystallographic, bonding, biological and spectral properties. Chemical Physics Letters, 2019, 64-71. DOI: 10.1016/j.cplett.2018.11.020 - M. Rocha, D. M. Gil, G. A. Echeverría, O. E. Piro, J. L. Jios, S. E. Ulic.
Enol-imino–Keto-enamine Tautomerism in a Diazepine Derivative: How Decisive Are the Intermolecular Interactions in the Equilibrium?. The Journal of Organic Chemistry, 2019, 84, 17, 11042–11053. DOI: 10.1021/acs.joc.9b01533 - L.E. Salvador Vallejo, M. Guijarro, D. Rubio, B. Aucatoma, T. Guillén, P. Vargas Jentzsch, V. Ciobotă, L. Stolker, S. E. Ulic, L. Vásquez, P. Garrido, J. Bravo, L.A. Ramos Guerrero.
Exploratory Monitoring of the Quality and Authenticity of Commercial Honey in Ecuador. Foods, 2019, 8, 105-117. DOI: 10.3390/foods8030105 - C. D. Alcívar León, G. A. Echeverría, O. E. Piro, S. E. Ulic, J. L. Jios, C. A. Luna Tapia, M. F. Mera Guzmán.
New thiourea and urea derivatives containing trifluoromethyl- and bis-triflouromethyl-4H-chromen-3-yl substituents. Molecular Physics, 2019, 117, 368-381. DOI: 10.1080/00268976.2018.1514132 - C. D. Alcívar León, L. A. Ramos Guerrero, P. M. Bonilla Valladares, G. A. Echeverría, O. E. Piro, S. E. Ulic, J. L. Jios, P. Langer.
Synthesis and structural study of 2-(haloalkyl)-3-methylchromones. Monatshefte für Chemie - Chemical Monthly, 2019, 150, 1929–1940. DOI: 10.1007/s00706-019-02512-5
Año 2018
- M. Rocha, D. M. Gil, G. A. Echeverría, O. E. Piro, J. L. Jios, S. E. Ulic.
A new perfluoromethyl aminoenone derivative and the role of the hydrogen bonding in the intra- and intermolecular interactions. Journal of Fluorine Chemistry, 2018, 208, 36-47. DOI: 10.1016/j.jfluchem.2018.01.001 - J. E. Galván; M. E. Defonsi Lestard; O. E. Piro; G. A. Echeverría; R. D. I. Molina; M. E. Arena; S. E. Ulic; M. E. Tuttolomondo; A. Ben Altabef. Synthesis, characterization and crystal structure of 2-chloroethyl(methylsulfonyl)methanesulfonate. New Journal of Chemistry, 2018, 42, 11073-11084. DOI: 10.1039/C7NJ05138G
Año 2017
- M. Rocha, A. Di Santo, G. A. Echeverría, O. E. Piro, F. Cukiernik, S. E. Ulic, D. M. Gil. Supramolecular self-assembly of a new multi-conformational Schiff base through hydrogenbonds: Crystal structure, spectroscopic and theoretical investigation. Journal of Molecular Structure, 2017, 1133, 24-36. DOI: 10.1016/j.molstruc.2016.11.071
- C. D. Alcívar León, G. A. Echeverría, O. E. Piro, S. E. Ulic, J. L. Jios, J. A. Pereañez, I.C. Henao Castañeda, H. Pérez. The role of non-covalent interactions in some 2-trifluoromethylchromones in the solid state. New Journal of Chemistry, 2017, 41, 23, 14659-14674. DOI: 10.1039/C7NJ00481H
- J. E. Galván, E. Contreras aguilar, M. E. Defonsi Lestard, M. E. Tuttolomondo, S. E. Ulic, A. Ben Altabef. Theoretical and experimental study of a new thiosulfonate derivative: Methyltrifluoromethanethiosulfonate, CF3SO2SCH3. Conformational transferability in CX3SO2S-R compounds. Inorganica Chimica Acta, 2017, 455, 254-261. DOI: 10.1016/j.ica.2016.10.020
- E. Contreras Aguilar, G. A. Echeverría, O. E. Piro, S. E. Ulic, J. L. Jios, M. E. Tuttolomondo, H. Pérez. Weak and strong hydrogen bonds conducting the supramolecular framework of 1-butyl-3-(1-naphthoyl)thiourea: crystal structure, vibrational studies, DFT methods, Pixel energies and Hirshfeld surface analysis. Molecular Physics, 2017, 116, 399-413. DOI: 10.1080/00268976.2017.1395917
Año 2016
- C. D. Alcívar León, G. A. Echeverría, O. E. Piro, S. E. Ulic, J. L. Jios, M. Burgos Paci, G. A. Argüello. The role of halogen C-X1···X2-C contact on the preferred conformation of 2-perhalomethylchromones in solid state. Chemical Physics, 2016, 472, 142-155. DOI: 10.1016/j.chemphys.2016.03.017
Año 2015
- C. D. Alcívar León, G. A. Echeverría, O. E. Piro ,S. E. Ulic, J. L. Jios. A detailed experimental and theoretical study of two novel substituted trifluoromethylchromones. The influence of the bulky bromine atom on the crystal packing. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2015, 136, C, 1358-1370. DOI: 10.1016/j.saa.2014.10.022
Año 2014
- L. Ramos, S. Ulic, R. M. Romano, H. Beckers, H. Willner, M. Ge, S. Tong y C. O. Della Védova. Dimers of Perhaloacetyl Cyanides: CClF2C(O)OC(CN)2CClF2 and CF3C(O)OC(CN)2CF3. Preparation, Properties and Spectroscopy. The Journal of Physical Chemistry A, 2014, 118, 1721-1729. DOI: 10.1021/jp4127732
- L. Ramos, S. Ulic, R. M. Romano, H. Willner y C. O. Della Védova. Matrix Photochemical Study and Conformational Analysis of CH3C(O)NCS and CF3C(O)NCS. Journal of Physical Chemistry A, 2014, 118, 697-707. DOI: 10.1021/jp4110085