This alphabetical chemistry dictionary offers definitions and examples of important chemistry and chemical engineering terms. For each term, a brief definition is given, and each link leads to a more comprehensive discussion of the word. From absolute alcohol, which refers to the common name for hig...
The Future of IUPAC Chemistry historically emerged and developed as an interdisciplinary scientific field, with a broad definition of its borders. In keeping with Linus Pauling’s definition of the chemical bond “whatever is convenient to the chemist to define as a bond,” chemistry can be define...
The major types of chemical reaction are: Synthesis or Direct Combination Reaction - Reactants form a more complex product. Decomposition or Analysis Reaction- A reactant breaks into two or more smaller products. Single Displacement or Replacement Reaction- Also called a substitution reaction, this ...
-12π Electrocyclization.Electrocyclization reactions offer valuable and effective approaches for the construction of ring systems of various patterns in organic synthesis. Baosheng Li (李葆生)and coworkers report a combination of a copper relay-catalyzed three-c...
Surface-localized phase mediation accelerates quasi-solid-state reaction kinetics in sulfur batteries Lithium–sulfur batteries are a promising electrochemical energy storage technology; however, they are limited by the dissolution of polysulfide intermediates. Now, it has been shown that sparingly solvati...
Low-cost Cu catalysts for the hydrogen evolution reaction (HER) can transform industrial water electrolysis, but pure Cu typically exhibits a negligible HER. Here, combining pulsed laser ablation and subsequent electroreduction, Cu nanotwins form that enable the HER at an overpotential of 301 mV,...
chemical reaction equivalent weight law of definite proportions law of multiple proportions (Show more) stoichiometry, in chemistry, the determination of the proportions in which elements or compounds react with one another. The rules followed in the determination of stoichiometric relationships are based...
Ionization of Aromatics 18m 20. Phenols55m Phenol Acidity 15m Oxidation of Phenols to Quinones 14m Cleavage of Phenyl Ethers 10m Kolbe-Schmidt Reaction 15m 22. Carboxylic Acid Derivatives: NAS2h 51m Carboxylic Acid Derivatives 7m Naming Carboxylic Acids ...
Activation energy is a term in the Arrhenius equation used to calculate the energy needed to overcome the transition state from reactants to products. The Eyring equation is another relation that describes the rate of reaction, except instead of using activation energy, it includes Gibbs energy of...
This is the definition of a condensation reaction, as the term is used in chemistry, along with examples of representative reactions.