Radicals derived from parent hydrides

IR-6.2.4.1 Heteronuclear acyclic parent hydrides in general IR-6.2.4.2 Hydrides consisting of chains of alternating skeletal atoms IR-6.2.4.3 Heteronuclear monocyclic parent hydrides Hantzsch-Widman nomenclature IR-6.2.4.4 Skeletal replacement in boron hydrides IR-6.2.4.5 Heteronuclear polycyclic parent hydrides IR-6.3 Substitutive names of derivatives of parent hydrides IR-6.3.1 Use of suffixes and prefixes IR-6.3.2 Hydrogen substitution in boron hydrides IR-6.4 Names of ions and radicals derived from parent hydrides... 

IR-6.4.4 Anions derived from parent hydrides by loss of one or more hydrons IR-6.4.5 Anions derived from parent hydrides by addition of one or more hydride ions IR-6.4.6 Substituted anions IR-6.4.7 Radicals and substituent groups... 

Radicals and substituent groups derived from parent hydrides by removal of one or more hydrogen atoms are named by modifying the parent hydride name as follows ... 

For the naming of monoazo compounds R —N2 —R, in which the linked radicals are derived from identical parent hydrocarbons, the prefix azo is added to the name of the parent hydrocarbon hydride, e.g., 1,2-azonaphthalene. Complex compounds with two or more azo groups are named in a similar manner (see Rule C-9.11.3). 

In the Chemical Abstracts method (also accepted by IUPAC Rule C-912), the naming of monoazo compounds with radicals R derived from two identical parent hydrocarbon hydrides is the same as mentioned above (for an exception see C-912.2). If the azo group links groups that are different when unsubstituted (R-N2-R ), a parent molecule RH is treated as substituted by R -N2- (Rule C-912.4) thus, 1.8 is called 4-(2-hydroxy-l-naphthylazo)benzenesulfonic acid or 4-(2-hydroxy-... 

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