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HETEROCYCLE NOMENCLATURE
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Heterocycle numbering follows the rules cited above, no indicated hydrogens or hydro prefixes are used. Unsaturations are indicated by the particle eno or ino.
Regarding the formation of the name, the main novelty is that the locators of the Hantzsch-Widman prefixes precede each one of them, although they continue to appear in the order of priority in Table 1.
 
replacement nomenclature
 
[1] Silacyclopentane
[2] Silabenzene
[3] 1-Thia-4-aza-2,6-disilacyclohexane
 
I These pages on heterocyclic nomenclature are based on the brilliant notes of Professor Ramón Liz (Universidad de Oviedo)