Abstract
The principles of numbering (enumeration) used for compounds and for radicals are the same, with one exception, namely: for compounds the lowest available numbers are assigned to the principal (functional) group or groups; for radicals they are assigned to the “free” valency or valencies, and the principal groups are then treated merely as ordinary prefixes.
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Reference
See J. chem. Soc., 1952, 5076; IUPAG Nomenclature of Organic Chemistry, 1957, Section A. Butterworths, London, 2nd edn., 1966; IUPAG Nomenclature of Organic Chemistry, 1965, Section C. Butterworths, London, 1965.
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Cahn, R.S. (1968). Organic: Numbering. In: An Introduction to Chemical Nomenclature. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-6598-1_5
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DOI: https://doi.org/10.1007/978-1-4899-6598-1_5
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