Parent hydrides mononuclear

Some variants are also allowed for mononuclear cations of Groups 15, 16 and 17. These are based on the usage of substitutive nomenclature, where the formal addition of a hydron to a parent hydride to give a cation is represented by the suffix -onium. 

It is generally an arbitrary matter to decide where to apply substitutive nomenclature in these cases. Table 5.1 shows the elements to which both CNIC and CNOC approve the application. Table 5.2 gives the names of the corresponding mononuclear parent hydrides. The only additional elements to which substitutive nomenclature may sometimes be applied are the halogens, particularly iodine. 

IR-6.2.1 Mononuclear parent hydrides with standard and non-standard bonding numbers IR-6.2.2 Homopolynuclear parent hydrides (other than boron and carbon hydrides)... 

IR-6.2.1 Mononuclear parent hydrides with standard and non-standard bonding numbers... 

The mononuclear hydrides of elements of groups 13-17 of the periodic table play a central role in substitutive nomenclature. They are used as parent hydrides as indicated above with the parent names given in Table IR-6.1. 

Otlium ion (1) A cation (with its counterion) derived by addition of a hydron (hydrogen ion) to a mononuclear parent hydride of the nitrogen, chalcogen, and halogen family, e.g., H4N+ ammonium ion. 

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