Results 21 to 30 of about 8,624 (155)

Valorización de la biomasa por medio de catálisis homogénea

Tecnociencia Chihuahua, 2023
Genéricamente podemos considerar a la biomasa como todo aquel material proveniente del crecimiento de microorganismos, plantas o animales, dicho material representa una fuente de residuos y en consecuencia de diversas moléculas de interés, las cuales ...
Diego Roa, Alma Arévalo, Juventino García-Alejandre   +2 more
doaj   +1 more source

Direct Access to Chiral Piperidines by Enantioselective HAT‐Initiated C(sp3)─H Oxidation

Angewandte Chemie International Edition, EarlyView.
The direct desymmetrization of piperidines is achieved through manganese‐catalyzed enantioselective α‐C(sp3)─H oxidation with hydrogen peroxide, affording versatile chiral N,O‐acetals in good yields and with high enantio‐ and diastereoselectivity. These intermediates provide access to diverse functionalized piperidines with retention of chirality ...
Sethuraman Muthuramalingam, Josep M. Luis, Arnau Call, Quentin Lefebvre, Matthew S. Sigman, Miquel Costas   +5 more
wiley   +1 more source

MEMORIA 2014 Instituto de Catálisis y Petroleoquímica [PDF]

, 2014
N
CSIC - Instituto de Catálisis y Petroleoquímica (ICP)
core  

Exploring the Boundaries of Aromaticity in Complex Structures and Excited States Through Computational Analysis

Chemistry – A European Journal, EarlyView.
Understanding aromaticity has evolved from benzene‐centric concepts to a broad multidimensional framework spanning organic, inorganic, and excited‐state systems. This review highlights ambiguities between magnetic, electronic, geometric, and energetic descriptors, emphasizing the need for unified, multi‐criteria approaches.
Sílvia Escayola, Miquel Solà, Albert Poater   +2 more
wiley   +1 more source

MEMORIA 2013 Instituto de Catálisis y Petroleoquímica [PDF]

, 2012
N
CSIC - Instituto de Catálisis y Petroleoquímica (ICP)
core   +1 more source

Magnetita (Fe3O4): Una estructura inorgánica con múltiples aplicaciones en catálisis heterogénea

Revista Colombiana de Química, 2017
Se describió la intervención del mineral magnetita como catalizador o como soporte catalítico, un material inorgánico con una estructura de espinela inversa (FeFe2O4), en el desarrollo de un número importante de reacciones químicas de interés científico,
José Gregorio Carriazo Baños, Virginia Esperanza Noval Lara, Cristian Ochoa Puentes   +2 more
doaj   +1 more source

Modifying Catalytic Sustainability in Renaud Catalysts: Hints From Aromaticity, Conceptual DFT, and Steric Mapping

European Journal of Organic Chemistry, EarlyView.
Replacing precious‐metal hydrogenation catalysts with sustainable iron systems is becoming a central challenge in catalysis. This predictive computational study reveals how rational redesign of Knölker‐type iron complexes dramatically enhances catalytic performance.
Carles Alcaide, Clara Mauclaire, Muhammad Ehtisham, Sílvia Simon, Sylvain Gaillard, Jean Luc Renaud, Albert Poater   +6 more
wiley   +1 more source

Evaluación de distintas materias primas para la producción de biodiesel mediante catálisis heterogénea alcalina [PDF]

, 2019
Argentina como uno de los mayores productores de oleaginosas del mundo, puede satisfacer la demanda interna de aceites vegetales para alimentación y como fuentes sustentables de energía.
Maia Moreira Dias, Joana, Ferrero, Gabriel Orlando, Sánchez Faba, Edgar Maximiliano, Eimer, Griselda Alejandra, Vaschetto, Eliana Gabriela   +4 more
core   +1 more source

A General Stereochemical Model for Grignard Additions to α‐Alkoxy Nitrones: Density Functional Theory Evidence for an Intrinsic α‐Chelation‐Controlled Pathway

European Journal of Organic Chemistry, EarlyView.
A comprehensive DFT conformational study of Grignard additions to α‐alkoxy nitrones reveals that the reaction proceeds through a dinuclear α‐chelated transition structure in which the nitrone oxygen coordinates two magnesium centers. Other common additives, such as zinc dichloride, boron trifluoride, and dimethylaluminum chloride, were also studied ...
Manuel Pedrón, Tomás Tejero, Pedro Merino   +2 more
wiley   +1 more source

MEMORIA 2015 Instituto de Catálisis y Petroleoquímica [PDF]

, 2015
N
CSIC - Instituto de Catálisis y Petroleoquímica (ICP)
core