Page 79 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

T A B L E S T A B L E I I I

Table III Continued

onium Ending of still acceptable non-systematic names of cations formed by hydron addition to a
mononuclear parent hydride: ammonium, oxonium (see Section IR-6.4.1).
ono Ending of prefixes for substituent groups formed from ‘onic’ acids by removal of a
hydrogen atom, e.g. phosphono for P(¼O)(OH) 2 .
Exception: note that S(¼O) 2 OH is ‘sulfo’ rather than ‘sulfono’.
onous Ending of the parent names of acids of the types HX(OH) 2 (X ¼ N, P, As, Sb), e.g.
stibonous acid.

Ending of the parent names dithionous, trithionous, etc., acids (see Table IR-8.1).
onoyl Ending of prefixes for substituent groups formed by removing all hydroxy groups from
‘onic’ acids, e.g. phosphonoyl, HP(O)5; s elenonoyl, HSe(O) 2 . ( See Table IR-8.1 for
phosphonic and selenonic acids.)
onyl Ending of prefixes for the divalent substituent groups 4X(¼O) 2 (sulfonyl, selenonyl and
telluronyl for X ¼ S, Se and Te, respectively).
5
orane Ending of the acceptable alternative names phosphorane for l -phosphane (PH 5 ), arsorane
5
5
for l -arsane (AsH 5 ) a nd stiborane for l -stibane (SbH 5 ).
oryl Ending of prefixes for substituent groups formed by removing all hydroxy groups from
‘oric’ acids, e.g. phosphoryl, P(O) , f rom phosphoric acid.
ous Ending of parent names of certain inorganic oxoacids, e.g. a rsorous acid, seleninous acid.
For more examples of ‘ous’ acid names, see Tables IR-8.1 and IR-8.2. See also ‘inous’,
‘onous’.
Ending formerly added to stems of element names to indicate a l ower oxidation state, e.g.
ferrous chloride, cuprous oxide, cerous hydroxide. Such names are no longer acceptable.
triene See ‘ene’.
triide See ‘ide’.
triium See ‘ium’.
triyl Combined suffix composed of the suffix ‘yl’ and the multiplying prefix ‘tri’, indicating the
loss of three hydrogen atoms from a p arent hydride resulting in a t riradical or a s ubstituent
group forming three single bonds, e.g. the substituent groups boranetriyl, B5; t risilane-
j
5
1,2,3-triyl, SiH 2 SiHSiH 2 ; l -phosphanetriyl, H P . ( See also ‘ylidyne’ and
2
‘ylylidene’.)
uide Suffix specifying the addition of hydride to a p arent structure, accompanied by locants and

multiplicative prefixes if appropriate, e.g. tellanuide, TeH 3 .
uido Modification of the ‘uide’ suffix in an anion name used when the anion acts as a l igand.
y T erminal vowel of prefixes for some substituent groups, e.g. carboxy, COOH; hydroxy,
OH; oxy, O .
Terminal vowel in prefixes used in specifying chain and ring atoms in additive
nomenclature for inorganic chains and rings, cf. S ection IR-7.4. These prefixes are given
for all elements in Table X.
yl Suffix to indicate removal of hydrogen atoms from a p arent hydride to form radicals or
substituent groups, accompanied by multiplicative prefixes and locants as appropriate, e.g.
*
*
*
hydrazinyl, H 2 NNH or H 2 NNH ; h ydrazine-1,2-diyl, HNNH or HNNH . ( See also
‘diyl’, ‘ylene’, ‘ylidene’, ‘triyl’, ‘ylylidene’, ‘ylidyne’.)

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