Table C-IV Some Functional Class Names Used in Radicofunctional Nomenclature, in Order of Decreasing Priority for Choice as Such

Group Functional class name
X in acid derivatives RCO-X, RSO2 -X etc. Name of X; in the order fluoride, chloride, bromide, iodide; cyanide, azide, etc.; then their S, followed by their Se analogues
-CN, -NC Cyanide, isocyanide
>CO Ketone, then Se analogues
-OH Alcohol; followed by S and then Se analogues
-O-OH Hydroperoxide
>O Ether or oxide
>S, >SO, >SO2 Sulfide, sulfoxide, sulfone
>Se, >SeO, >SeO2 Selenide, selenoxide, selenone
-F, -Cl, -Br, -I Fluoride, chloride, bromide, iodide
-N3 Azide

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