-ir-comb. form

Etymology: See quot.

Chemistry.

A formative element in the names of three-membered heterocyclic ring systems. A systematic nomenclature is generated by appending to -ir- a prefix (or prefixes) representing the hetero-atom(s), and one of the suffixes -ane suffix², -ene comb. form, -idine suffix, or -ine suffix⁵, to indicate saturation or unsaturation and the presence or absence of a nitrogen atom in the ring. (Cf. -irane suffix, -irene suffix, -iridine suffix, -irine suffix.)

ΚΠ

1928 A. M. Patterson in Jrnl. Amer. Chem. Soc. L. 3079 With a precedent already set for et (four members, compare ‘tetra’) and with ol (five members) and in (six members) already confirmed by usage, it would only be necessary to supply three syllables more to cover all but rare cases. These might be ir (from ‘tri’, reversed) for three members.

1928 A. M. Patterson in Jrnl. Amer. Chem. Soc. L. 3079 Examples of the resulting names and combining forms are: oxirene, oxirane (ethylene oxide).

This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2020).

单词	-ir-
释义	-ir-comb. form Etymology: See quot. Chemistry. A formative element in the names of three-membered heterocyclic ring systems. A systematic nomenclature is generated by appending to -ir- a prefix (or prefixes) representing the hetero-atom(s), and one of the suffixes -ane suffix², -ene comb. form, -idine suffix, or -ine suffix⁵, to indicate saturation or unsaturation and the presence or absence of a nitrogen atom in the ring. (Cf. -irane suffix, -irene suffix, -iridine suffix, -irine suffix.) ΚΠ 1928 A. M. Patterson in Jrnl. Amer. Chem. Soc. L. 3079 With a precedent already set for et (four members, compare ‘tetra’) and with ol (five members) and in (six members) already confirmed by usage, it would only be necessary to supply three syllables more to cover all but rare cases. These might be ir (from ‘tri’, reversed) for three members. 1928 A. M. Patterson in Jrnl. Amer. Chem. Soc. L. 3079 Examples of the resulting names and combining forms are: oxirene, oxirane (ethylene oxide). This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2020). < comb. form1928
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