R-18.104.22.168 Substitutive names are formed by prefixing the name of the group , , , or to the name of the parent hydride corresponding to R.
R-22.214.171.124 Functional class names are formed by citing the names of the groups R and in alphabetical order followed by the class name "ether", "sulfide", "selenide", or "telluride", each as a separate word.
Examples to R-126.96.36.199
R-188.8.131.52 Replacement nomenclature (see R-1.2.2) is used to name linear polyethers, polysulfides, etc. It is especially advantageous for unsymmetrical structures with several chalcogen atoms and those with several different chalcogen atoms.
Examples to R-184.108.40.206
R-220.127.116.11 Cyclic ethers. An oxygen atom directly attached to two atoms that are already part of a ring system, or to two carbon atoms of a chain, may be named (a) as a heterocycle, following the appropriate recommendations for naming heterocycles, including the use of the prefix "epoxy" as a bridge prefix, in which case it is a nondetachable prefix (see R-0.1.8); or (b) by using the prefix "epoxy" substitutively, in which case it is detachable (see R-0.1.8) and therefore alphabetized along with any other substitutive prefixes. The latter method is particularly useful when it is desired to preserve the name of a specific structure, for example, in naming natural products such as steroids and carotenoids.
Examples to R-18.104.22.168
Note: The class name "oxide" has also been used additively to name cyclic ethers of the second kind, for example, ethylene oxide and styrene oxide.
Examples to R-22.214.171.124
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