Definitions for cycloaddition
cy·cload·di·tion

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1. cycloadditionnoun

   An addition reaction that leads to the formation of a cyclic product.

WikipediaRate this definition:0.0 / 0 votes

1. Cycloaddition

   In organic chemistry, a cycloaddition is a chemical reaction in which "two or more unsaturated molecules (or parts of the same molecule) combine with the formation of a cyclic adduct in which there is a net reduction of the bond multiplicity". The resulting reaction is a cyclization reaction. Many but not all cycloadditions are concerted and thus pericyclic. Nonconcerted cycloadditions are not pericyclic. As a class of addition reaction, cycloadditions permit carbon–carbon bond formation without the use of a nucleophile or electrophile. Cycloadditions can be described using two systems of notation. An older but still common notation is based on the size of linear arrangements of atoms in the reactants. It uses parentheses: (i + j + …) where the variables are the numbers of linear atoms in each reactant. The product is a cycle of size (i + j + …). In this system, the standard Diels-Alder reaction is a (4 + 2)-cycloaddition, the 1,3-dipolar cycloaddition is a (3 + 2)-cycloaddition and cyclopropanation of a carbene with an alkene a (2 + 1)-cycloaddition.A more recent, IUPAC-preferred notation, first introduced by Woodward and Hoffmann, uses square brackets to indicate the number of electrons, rather than carbon atoms, involved in the formation of the product. In the [i + j + ...] notation, the standard Diels-Alder reaction is a [4 + 2]-cycloaddition, while the 1,3-dipolar cycloaddition is also a [4 + 2]-cycloaddition.

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1. Cycloaddition

   A cycloaddition is a pericyclic chemical reaction, in which "two or more unsaturated molecules combine with the formation of a cyclic adduct in which there is a net reduction of the bond multiplicity." The resulting reaction is a cyclization reaction. Many but not all cycloadditions are concerted. Cycloadditions are usually described by the backbone size of the participants. This would make the Diels-Alder reaction a cycloaddition, the 1,3-dipolar cycloaddition a cycloaddition and cyclopropanation of a carbene with an alkene a cycloaddition. This type of reaction is non-polar addition reaction.

How to pronounce cycloaddition?

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Numerology

1. Chaldean Numerology

   The numerical value of cycloaddition in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of cycloaddition in Pythagorean Numerology is: 8

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References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Cycloaddition
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Cycloaddition
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=cycloaddition