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Cycloadditions — Definition, Classification, and Characterization
Author(s) -
Huisgen R.
Publication year - 1968
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.196803211
Subject(s) - terminology , arbitrariness , mechanism (biology) , characterization (materials science) , chemistry , computer science , epistemology , philosophy , linguistics , nanotechnology , materials science
The growing volume of publications on cycloadditions indicates that this general type of reaction merits a place beside the better‐known substitutions, eliminations, and additions. The world of phenomena does not provide us with definition and classification principles. These are created by the scientist and are not free from arbitrariness. A terminology [1] is suggested for cycloadditions. These reactions do not all proceed by the same mechanism. Since ideas about reaction mechanism can change with the introduction of new criteria, it is shortsighted to base definitions and classifications on mechanism alone. Consequently, the definition of cycloadditions will not be restricted simply to multi‐center processes with a cyclic electron shift.