Results 71 to 80 of about 150,986 (194)

Desarrollo y caracterización de un nuevo esmalte antideslizante de textura lisa y de fácil limpieza para baldosas de gres porcelánico

Boletín de la Sociedad Española de Cerámica y Vidrio, 2016
Dada la problemática que presentan los esmaltes antideslizantes convencionales, los cuales poseen una rugosidad superficial que dificulta la limpieza de la superficie de la pieza, se ha diseñado un esmalte antideslizante de naturaleza vitrocerámica que ...
E. Barrachina Albert, J.A. Martín Núñez, D. Fraga Chiva, I. Calvet Roures, J.B. Carda Castelló   +4 more
doaj   +1 more source

Consideraciones del estudiante sobre su formación práctica en asignaturas del área de conocimiento de química orgánica [PDF]

, 2015
En la presente comunicación se detallarán los resultados obtenidos de la valoración del alumno sobre los créditos prácticos en diferentes asignaturas de grado (Grado en Biología, y Grado en Ciencias del Mar: 26510, Química; Grado en Química: 26030 ...
Alonso, Diego A., Baeza, Alejandro, Blasco, Inmaculada, González López, Susana, Guillena, Gabriela, Gómez Lucas, Cecilia, Martínez Flores, Regina, Pastor, Isidro M., Ramón, Diego J., Trillo Alarcón, María Paz   +9 more
core  

Mechanistic Paths for the Gold(I)‐Catalyzed Heteroannulation of Salicylic Amides With Apolar Alkynes Explored With Density Functional Theory Calculations

European Journal of Organic Chemistry, EarlyView.
A manifold of catalytic reaction paths can operate in the Au(I)‐catalyzed heteroannulation of salicylic amides and alkynes. However, a subtle initial nucleophilic advantage of N versus O and a kinetic bottleneck at an advanced stage of the mechanistic machinery seems to suffice for the reaction to run on a single path and with exquisite selectivity. We
Ioannis Stylianakis, Evaggelia Vlachou, Carlos Silva López, Antonios Kolocouris   +3 more
wiley   +1 more source

La investigación en la Universidad [PDF]

, 2001
Juan Carlos Rodríguez Ubis: Director del Servicio Interdepartamental de Investigación. Profesor Titular del Departamento de Química Orgánica de la U.A.M. Sus líneas de investigación se centran alrededor de la Química Supramolecular en las que se inició
Rodríguez Ubis, Juan Carlos
core   +1 more source

Synthetic Implications of Spin States in the Reactivity of Ni Intermediate Complexes in Coupling Reactions

European Journal of Organic Chemistry, EarlyView.
The formation of triplet Ni(II) complexes by activation of bromoalkenes with alkyl‐ or boryl Ni(I) is key to control the outcome of the reductive cross‐coupling of bromoalkanes precluding the formation of alkylboronates. We present a mechanistic study on the Ni‐catalyzed cross‐coupling reaction of bromoalkanes with diboron compounds as reductants.
Diego J. Cárdenas
wiley   +1 more source

Silyl Rearrangements in Gold‐Catalyzed Transformations

European Journal of Organic Chemistry, EarlyView.
The synergy between the exceptional ability of gold catalysts to activate unsaturated substrates and the inherent tendency of organosilicon reagents to undergo silyl‐group rearrangements has unlocked a range of novel transformations, enabling access to otherwise challenging molecular architectures.
Patricia García‐Martínez, Luis A. López   +1 more
wiley   +1 more source

Flourensia fiebrigii (Asterales: Asteraceae), fuente de metabolitos antipatogénicos

Lilloa, 2011
Verni, Cecilia; Alva, Mariana; Muruaga, Nora; Borkosky, Susana; Car tagena, Elena; Bardón, Alicia. 2011. “Flourensia fiebrigii (Asterales: Asteraceae), fuente de metabolitos antipatogénicos”. Lilloa 48 (1).
Cecilia Verni, Mariana Alva, Nora Muruaga, Silvana Borkosky, Elena Cartagena, Alicia Bardón   +5 more
doaj  

Nucleobase Stacking Sustained by Pt−Pt Interactions

ChemistryEurope
This article reports the use of metal–metal interactions as a way to induce nucleobase stacking in a dinucleotide chain. We synthetized and study a series of C,N‐cyclometallated platinum(II) binuclear complexes derived from 6‐phenylpurine dinucleotide 1 ...
Dr. Carmen Lorenzo‐Aparicio, Prof. Dr. Pablo García‐Álvarez, Prof. Dr. Javier A. Cabeza, Prof. Dr. Mar Gómez‐Gallego, Prof. Dr. Miguel A. Sierra   +4 more
doaj   +1 more source

LABORATORIO INTEGRAL DE QUÍMICA ORGÁNICA - IQ [PDF]

, 2017
GUÍA ...
GOMEZ ESPINOSA ROSA MARIA, GOMEZ MARTINEZ FRAZZI, PAVON FLORES MIRIAM   +2 more
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Metal‐Free Electrophilic Borylative Cyclizations of Alkynes

The Chemical Record, EarlyView.
Metal‐free borylative cyclizations based on electrophilic alkyne activation by boron Lewis acids provide efficient access to borylated hetero‐ and carbocycles. Early studies using B(C6F5)3 displayed limited scope and application, whereas recent ClBcat‐ and BCl3‐based methods enable mild CB and CC/CX bond formation for the synthesis of cycles ...
Jaime Mateos‐Gil, Marcos Humanes, Manuel A. Fernández‐Rodríguez, Patricia García‐García   +3 more
wiley   +1 more source