Thiolic acid ester groups

Prim, alcohols and methyl groups from thiolic acid esters... 

Sodium carbonate Thiolic acid esters from a-azido-j -ketothioethers Neighboring group participation of sulfur... 

Numerous esters of the phosphorothioic acids are known. In salts and esters of these oxygen/ sulphur (0-S) acids there may be a preferred location of the multiple bond, but in general this is not known. Thus in principle there are two series of possible acids, each of which might give rise to salts and esters, as indicated in the nomenclature scheme in Table 9.3. The thionic acids contain the group P=S, while the thiolic acids contain the group P-SH. The term thioic is often used when the molecular form is unknown, or when specification is not desired. An analogous nomenclature scheme is applicable to 0/Se acids. 

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