Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Oscar Portillo"'
Autor:
Guadalupe Hernández-Téllez, Gloria E. Moreno, Sylvain Bernès, Angel Mendoza, Oscar Portillo, Pankaj Sharma, René Gutiérrez
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 72, Iss 4, Pp 583-589 (2016)
Using a general solvent-free procedure for the synthesis of chiral Schiff bases, the following compounds were synthesized and their crystal structures determined: (S)-(+)-2-{[(1-phenylethyl)imino]methyl}naphthalene, C19H17N, (1), (S)-(+)-2-({[(4-meth
Externí odkaz:
https://doaj.org/article/aa650db1bde44a989dc595cd36ff4cb0
Autor:
Guadalupe Hernández-Téllez, Sylvain Bernès, Angel Mendoza, Francisco Javier Ríos-Merino, Gloria E. Moreno, Oscar Portillo, René Gutiérrez
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 72, Iss 3, Pp 350-354 (2016)
A series of thiophenes substituted in positions 2 and 5 by imine groups have been synthesized using a solvent-free approach, and their crystal structures determined. The substituents are chiral groups, and the expected absolute configuration for each
Externí odkaz:
https://doaj.org/article/f012ec9b415247799b0ef20ab737e583
Autor:
Guadalupe Hernández, Sylvain Bernès, Oscar Portillo, Alejandro Ruíz, Gloria E. Moreno, René Gutiérrez
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 71, Iss 12, Pp 1462-1466 (2015)
The crystal structures of three complexes [HgCl2L] were determined, namely, (S)-(+)-dichlorido[1-phenyl-N-(pyridin-2-ylmethylidene)ethylamine-κ2N,N′]mercury(II), [HgCl2(C14H14N2)], (S)-(+)-dichlorido[1-(4-methylphenyl)-N-(pyridin-2-ylmethylidene)e
Externí odkaz:
https://doaj.org/article/1010196ff60e4875ae504534fdf3dc95
Autor:
Martin Lazcano Hernández, Selene Gonzáles Ussery, Carlos Ochoa Velasco, Daniel Santiago Pereira, Oscar Portillo Moreno
Publikováno v:
ACTA Apicola Brasilica, Vol 4, Iss 1 (2016)
A La comercialización de los productos y subproductos de la colmena en cosmetología, farmacéutica y alimentos han aumentado en el mercado nacional, se observa en diferentes ferias apícolas en México. Este artículo describe el diseño de formula
Externí odkaz:
https://doaj.org/article/bce816f0bbcf47df92795d785c40ffd5
Autor:
Francisco J. Melendez, María Eugenia Castro, Oscar Portillo-Moreno, Guadalupe Hernández-Téllez, Gloria E. Moreno-Morales, Daniela Gutiérrez-Argüelles, Rodolfo Palomino-Merino, Efraín Rubio-Rosas, René Gutiérrez-Pérez
Publikováno v:
Molecules, Vol 24, Iss 18, p 3304 (2019)
The morphological, optical, and structural changes in crystalline chiral imines derived from 2-naphthaldehyde as a result of changing the −F, −Cl, and −Br halogen (−X) atoms are reported. Scanning electron microscopy (SEM), optical absorption
Externí odkaz:
https://doaj.org/article/68961adb63f5485b85dc64b0e5959d57
Autor:
Pablo Marco Trejo-García, Rodolfo Palomino-Merino, Juan De la Cruz, José Eduardo Espinosa, Raúl Aceves, Eduardo Moreno-Barbosa, Oscar Portillo Moreno
Publikováno v:
Micromachines, Vol 9, Iss 9, p 441 (2018)
Hybrid organic-inorganic materials are of great interest for various applications. Here, we report on the synthesis and optical characterization of silica-PMMA samples with different Eu3+ molar concentrations. The optical properties of this material
Externí odkaz:
https://doaj.org/article/6019fc42f66c4ff586821dddf15117d4
Autor:
Angel Mendoza, Sylvain Bernès, Guadalupe Hernández-Téllez, Oscar Portillo-Moreno, René Gutiérrez
Publikováno v:
Acta Crystallographica Section E, Vol 70, Iss 3, Pp o345-o345 (2014)
The title compound, C22H20Br2N2S, was synthesized under solvent-free conditions. The molecule shows crystallographic C2 symmetry, with the S atom of the central thiophene ring lying on a twofold rotation axis. Furthermore, as a consequence of the (S,
Externí odkaz:
https://doaj.org/article/3fcd84238931421f90083c53b685876c
Autor:
Sylvain Bernès, Guadalupe Hernández-Téllez, Manju Sharma, Oscar Portillo-Moreno, René Gutiérrez
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 9, Pp o1428-o1428 (2013)
The title chiral bis-aldimine, C24H26N2S, was synthesized using a solvent-free Schiff condensation. The molecule displays crystallographic C2 symmetry, with the S atom lying on the twofold axis parallel to [100]. As a consequence of the (S,S) stereoc
Externí odkaz:
https://doaj.org/article/6afc2a1af8084446bf9eef633fcd083d
Autor:
Guadalupe Hernández-Téllez, Oscar Portillo-Moreno, René Gutiérrez, Francisco J. Rios-Merino, Angel Mendoza
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 9, Pp o1480-o1480 (2013)
In the title compound, C21H17NS, the C=N double bond shows an E conformation. The dihedral angle between the mean planes of the naphthyl residue and the benzothiophene residue is 89.14 (6)°. The crystal packing is stabilized by intermolecular C—H.
Externí odkaz:
https://doaj.org/article/142787995a5f4c2883348af2f6b1a3dc
Autor:
Martin Lazcano Hernández, Oscar Portillo Moreno, Daniel Santiago Pereira, Ana Laura Ronquillo Téllez
Publikováno v:
Revista Verde de Agroecologia e Desenvolvimento Sustentável, Vol 7, Iss 4 (2012)
Se investigaron mieles de origen líquido multifloral y semicristalizada, unifloral de flor de Acahual (Tithonia tubeaformis) con características similares de fluidez. Lasmieles se tratarona diferentes temperaturasenel intervalo de3-68°C. Se cuanti
Externí odkaz:
https://doaj.org/article/c112a78b38dd4c62989f1a69258f5180