Results 291 to 300 of about 4,964,055 (321)

“Greening” a Familiar General Chemistry Experiment: Coffee Cup Calorimetry to Determine the Enthalpy of Neutralization of an Acid–Base Reaction and the Specific Heat Capacity of Metals

, 2017
Coffee cup calorimetry, performed with calorimeters made with styrofoam coffee cups, is a familiar experiment in the general chemistry laboratory. These calorimeters are inexpensive, easy to use, and provide good insulation for most thermodynamics ...
A. Bopegedera, K. Perera
semanticscholar   +1 more source

Using Lexical Analysis To Predict Lewis Acid–Base Model Use in Responses to an Acid–Base Proton-Transfer Reaction

Journal of Chemical Education, 2018
The Lewis acid–base model is key to identifying and explaining the formation and breaking of bonds in a large number of reaction mechanisms taught in the sophomore-level year-long organic chemistry course.
Amber J. Dood, K. B. Fields, J. Raker
semanticscholar   +1 more source

Application of an amino-functionalised metal–organic framework: an approach to a one-pot acid–base reaction

, 2013
The amino-functionalised metal–organic framework, MIL-101(Al)-NH2, has been synthesized by using a solvothermal method and employed as a bifunctional acid–base catalyst for a one-pot, sequential deacetalization–Knoevenagel condensation reaction.
Takashi Toyao, Mika Fujiwaki, Y. Horiuchi, M. Matsuoka   +3 more
semanticscholar   +1 more source

Development of an electrolytic system for non-Kolbe electrolysis based on the acid-base reaction between carboxylic acids as a substrate and solid-supported bases.

Journal of the American Chemical Society, 2007
We have successfully developed a novel electrolytic system for non-Kolbe electrolysis based on the acid−base reaction between carboxylic acids as a substrate and solid-supported bases. It was found that the acid−base reaction between carboxylic acids and
Toshiki Tajima, H. Kurihara, T. Fuchigami   +2 more
semanticscholar   +1 more source

Relationship between Acid–Base Properties and the Activity of ZrO2‐Based Catalysts for the Cannizzaro Reaction of Pyruvaldehyde to Lactic Acid

, 2017
The Cannizzaro reaction of pyruvaldehyde to lactic acid is investigated in a flow reactor with ZrO2 catalysts with different structures and acid–base properties.
Elise M. Albuquerque, L. E. Borges, M. A. Fraga, Carsten Sievers   +3 more
semanticscholar   +1 more source

Acid–Base Properties of N-Doped Carbon Nanotubes: A Combined Temperature-Programmed Desorption, X-ray Photoelectron Spectroscopy, and 2-Propanol Reaction Investigation

, 2016
Chemical and electronic properties of N-doped multiwalled carbon nanotubes (NCNTs) synthesized by NH3 treatment of preoxidized CNTs at 300, 500, and 700 °C have been investigated by a set of surface sensitive techniques. Temperature-programmed desorption
Klaus Friedel Ortega, Rosa Arrigo, Benjamin P. Frank, R. Schlögl, A. Trunschke   +4 more
semanticscholar   +1 more source

Wang-Landau Reaction Ensemble Method: Simulation of Weak Polyelectrolytes and General Acid-Base Reactions.

Journal of Chemical Theory and Computation, 2017
We present a novel method for the study of weak polyelectrolytes and general acid-base reactions in molecular dynamics and Monte Carlo simulations.
Jonas Landsgesell, Christian Holm, Jens Smiatek   +2 more
semanticscholar   +1 more source

Calcium phosphate cements prepared by acid-base reaction

, 1992
We investigated the characteristics of calcium phosphate cements (CPC) prepared by an exothermic acid–base reaction between NH4H2PO4-based fertilizer (Poly-N) and calcium aluminate compounds (CAC), such as 3CaO · Al2O3 (C3A), CaO · Al2O3 (CA), and CaO ...
T. Sugama, M. Allan, Janet M. Hill
semanticscholar   +1 more source

H2 elimination from hydrated aluminum clusters: Acid-base reaction mediated by intracluster proton transfer

, 2002
The reactivity of different [Al,20H 2 O] + clusters was investigated using gradient-corrected DFT. In clusters with the stoichiometry [AlH(OH)(H 2 O) 1 9 ] + , which contain a four-fold-coordinated Al I I I , H 2 formation wasfound to occur according to ...
B. Reinhard, G. Niedner‐Schatteburg
semanticscholar   +1 more source

Insights into Stereoselective Aminomethylation Reaction of α,β-Unsaturated Aldehyde with N,O-Acetal via N-Heterocyclic Carbene and Brønsted Acid/Base Cooperative Organocatalysis.

Journal of Organic Chemistry, 2016
A theoretical investigation has been performed to interrogate the mechanism and stereoselectivities of aminomethylation reaction of α,β-unsaturated aldehyde with N,O-acetal, which is initiated by N-heterocyclic carbene and Brønsted acid (BA).
Yang Wang, M. Tang, Yanyan Wang, D. Wei
semanticscholar   +1 more source