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  Encyclopedia of Keywords > Glossaries > Glossary of Chemistry > Reaction /   Michael Charnine

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  1. A reaction is called spontaneous if its thermodynamically favoured, by that meaning that it causes a net increase on entropy.
  2. The reaction is a sequence of nucleophilic additions.
  3. The reaction is used for thermite welding, often used to join railroad rails. (Web site)
  4. The reaction is used in carbohydrate chemistry as a chain extension method for example that of D- xylose.
  5. The reaction is a form of electrophilic addition.

Chemical Reaction

  1. Under this definition, a chemical reaction may be an elementary reaction or a stepwise reaction.
  2. Wood burns or undergoes rapid oxidation because it can react spontaneously with oxygen in a chemical reaction above a certain temperature. (Web site)
  3. The substrate of the explicit chemical reaction $react must be a subgraph of the molecule $mol. (Web site)


  1. Several empirical rules, like the Woodward-Hoffmann rules often come handy while proposing a mechanism for a chemical reaction.
  2. During this reaction, there is a rearrangement of atoms that makes or breaks chemical bonds.
  3. The stereochemistry of pericyclic reaction s is governed by the Woodward-Hoffmann rules and that of many elimination reaction s by the Zaitsev's rule.


  1. This is a Br--nsted-Lowry acid-base reaction in which ammonia is acting as an acid.
  2. Example:  This type of acid-base reaction is called neutralization. (Web site)
  3. Other types of invisible ink use different chemical reactions, usually an acid-base reaction (like litmus paper) similar to the blueprint process.

Take Place

  1. A chemical reaction can be envisioned to take place in a number of steps, each of which may have a different speed.
  2. When one reactant contains hydrogen atoms, a reaction can take place by exchanging protons in acid-base chemistry. (Web site)


  1. Some metals have naturally slow reaction kinetics, even though their corrosion is thermodynamically favorable. (Web site)
  2. Chemical kinetics - Rate of reaction. (Web site)

Organic Reactions

  1. Many reaction intermediates with variable stability can thus be envisaged during the course of a reaction.
  2. A pure chemical substance cannot be separated into other substances by a process that does not involve any chemical reaction and is rarely found in nature.
  3. A Chemical reaction is a process that results in the interconversion of chemical substances.
  4. Factors governing organic reactions are essentially the same as that of any chemical reaction.
  5. For many cases, an analysis of the enthalpy of the system will give a decent account of the energetics of the reaction mixture.

Reaction Rates

  1. Chemical equilibrium is the state in which the forward and reverse reaction rates are equal, thus preserving the amount of reactants and products.
  2. This then can lead to a decrease in the reaction rate if the rate-determining step involves breaking a bond between hydrogen and another atom.

Alkyl Halides

  1. The reaction rate is influenced only by the concentration of the alkyl halide because carbocation formation is the slowest, rate-determining step. (Web site)
  2. Alkynes are generally prepared by dehydrohalogenation of vicinal alkyl dihalides or the reaction of metal acetylides with primary alkyl halides.

Substances Involved

  1. A chemical reaction is invariably accompanied by an increase or decrease of energy of the substances involved.
  2. Reaction rates are related to the concentrations of substances involved in reactions, as quantified by the rate law of each reaction.


  1. Every chemical reaction is, in theory, reversible.
  2. When two compounds react with one another to form two new compounds, the reaction is called double decomposition. (Web site)
  3. For a reversible reaction, a two-way arrow is used.
  4. A balanced equation that describes a reaction occurring in solution, in which all strong electrolytes are written as dissociated ions. (Web site)


  1. For instance a limiting reagent determines how far a reaction can go.
  2. In order to obtain the E-alkene, the Schlosser modification of the Wittig reaction can be performed.
  3. The second Wittig reaction uses a non-stabilised Wittig reagent, and as expected this gives mainly the cis product.
  4. The Wittig reagent is usually prepared from a phosphonium salt, which is in turn made by the reaction of triphenylphosphine with an alkyl halide. (Web site)
  5. The amount of product in a chemical synthesis is the reaction yield.

Taking Place

  1. The sequence of steps in which the reorganization of chemical bonds may be taking place in the course of a chemical reaction is called its mechanism.
  2. For example in the Fries rearrangement the reactant is an ester and the reaction product an alcohol.
  3. The number of reactions hinting at the actual process taking place is much smaller, for example the ene reaction or aldol reaction.
  4. A material that accepts hydrogen ions in a chemical reaction. (Web site)


  1. Mao Shadowrun ( Shadowtech supplement) An enzyme that facilitates the rapid oxidation of adrenalin, thus removing its effects and decreasing reaction time.
  2. The simplest inorganic reaction is double displacement when in mixing of two salts the ions are swapped without a change in oxidation state. (Web site)


  1. A chemical reaction can be symbolically depicted through a chemical equation.
  2. In chemistry, a chemical equation is a symbolic representation of a chemical reaction.
  3. Write the net ionic equation for the primary reaction.
  4. Last check: ) A chemical equation is a description of a chemical reaction. (Web site)
  5. Given a description of a chemical reaction, be able to write a molecular equation.

Activation Energy

  1. The letter "Q" is reserved for "heat" in a chemical reaction. (Web site)
  2. Activation energy, which is defined as the amount of energy required to make the reaction start and carry on spontaneously.
  3. Higher activation energy implies that the reactants need more energy to start than a reaction with a lower activation energy. (Web site)
  4. Higher activation energy implies that a reaction will be harder to start and, therefore, slower.
  5. This nucleophilic addition is a reversible reaction but with aliphatic carbonyl compounds equilibrium is in favor of the reaction products. (Web site)


  1. Reaction mechanisms are proposed to explain the kinetics and the relative product mix of a reaction.
  2. Isotopic substitution can be used to determine the mechanism of a reaction via the kinetic isotope effect.
  3. In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical change occurs. (Web site)
  4. Heterogeneous reaction mechanisms of organic compounds. (Web site)
  5. The one and two-step mechanisms are named and known as E2 reaction and E1 reaction, respectively.

Chemical Species

  1. Thus, the theoretical yield can be calculated from reaction stoichiometry.
  2. Catalysis Catalysis is the processes whereby a chemical species accelerates a reaction without itself being consumed in the chemical reaction.
  3. A chemical species A is more stable than its isomer B if r G o 0 for the (real or hypothetical) reaction A B, under standard conditions.
  4. It is therefore recommended that the term "rate of reaction" be used only in cases where it is experimentally established that these conditions apply. (Web site)


  1. An example reaction is combustion, known from everyday experience, since burning gas in air produces heat.
  2. I just noticed that the ethane combustion reaction is not balanced.
  3. For example, consider the reaction CH 4 + 2 O 2 → CO 2 + 2 H 2 O (combustion of methane in oxygen).

Organic Compound

  1. They are prepared either by direct reaction of the metal with an organic compound or by replacement of a metal from another organometallic substance. (Web site)
  2. Organic reactions are chemical reaction s involving organic compound s.
  3. Alkylation Alkylation is an organic reaction in which an alkyl group replaces a hydrogen atom in an organic compound.


  1. Whether it will occur spontaneously or not is determined by the Gibbs free energy change of the reaction.
  2. A certain energy threshold, the activation energy (symbolized E a) must be crossed in order for a reaction to occur.

Spectator Ions

  1. The substance or substances initially involved in a chemical reaction are called reactants.
  2. Those ions that remain in solution after the reaction has completed are called spectator ions, that is, they are not involved in the reaction. (Web site)

Reaction Between

  1. These amazing molecules recognize specific reactant molecules called substrates; they then catalyze the reaction between them.
  2. Step growth polymers are defined as polymers formed by the stepwise reaction between functional groups of monomer.

Type Reaction

  1. This type of reaction is called an endothermic reaction (literally, inside heat, or absorbing heat).
  2. This type of reaction is referred to as an exothermic reaction (literally, outside heat, or throwing off heat).
  3. Decomposition is the opposite of synthesis, and in this type reaction individual atoms are no longer bonded.


  1. A very old named reaction is the Claisen rearrangement (1912) and a recent named reaction is the Bingel reaction (1993).
  2. Bingel reaction of fullerene with a malonate ester and a) sodium hydride or DBU in toluene at room temperature 45% yield.
  3. Books about "Reaction" in

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  Short phrases about "Reaction"
  Originally created: May 07, 2008.
  Links checked: July 31, 2013.
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