Retained trivial and semisystematic names for heteromonocyclic compounds are given in R-9.1, Table 23 and Table 24.
Examples of Hantzsch-Widman names (R-188.8.131.52)
(Cyclohexagermane, according to R-2.3.2)
R-184.108.40.206.1 The position of a single heteroatom determines the numbering in a monocyclic compound.
R-220.127.116.11.2 When the same heteroatom occurs more than once in a ring, the numbering is chosen to give the lowest locants to the heteroatoms.
Example to R-18.104.22.168.1
R-22.214.171.124.3 When heteroatoms of different kinds are present, the locant 1 is given to a heteroatom which appears earliest in Table 3. The numbering is then chosen to give the lowest locants to the heteroatoms, first considered as a set without regard to kind; if a choice still remains, then to a heteroatom appearing earliest in Table 3.
Example to R-126.96.36.199.2
R-188.8.131.52 Heteromonocyclic compounds may be named by replacement nomenclature. However, replacement nomenclature for heteromonocycles with 10 or fewer members has usually been applied only to silicon-containing rings. Numbering follows R-184.108.40.206.
Examples to R-220.127.116.11.3
R-18.104.22.168 Saturated monocyclic systems consisting of repeating units of two different skeletal atoms may be named by citing successively the prefix "cyclo-" followed by a multiplying infix denoting the number of repeating units, the "a" terms of the atoms of the repeating unit in the reverse order to that given in R-9.3, and the suffix "-ane". The terminal letter "a" of an "a" term is elided when followed by a vowel; the terminal vowel of a numerical prefix is not elided even when the "a" term begins with the same vowel. Numbering follows, R-22.214.171.124.
Examples to R-126.96.36.199
Examples to R-188.8.131.52
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