thiol- Chem.
(ˈθaɪəl)
[f. thio- + -ol.]
A name for the group SH in combination, analogous to hydroxyl, OH.
It indicates the presence of an -SH group (or an -SR group, where R is an alkyl radical), as in methyl-thiolcarbamate, H2N.CO.SCH3, as distinguished from methyl carbamate, H2N.CO.OCH3, and also from methyl-thioncarbamate, H2N.CS.OCH3: see thion-. Also, in those cases in which hydroxy- would mean the presence of an -OH group, thiol- indicates the presence of an -SH group; and where methoxy-, ethoxy-, etc., would indicate CH3O-, C2H5O-, RO- groups, methylthiol-, ethylthiol-, R-thiol-, indicate CH3S-, C2H5S-, RS- groups; thus, the sulphur compound corresponding to sodium ethoxyacetate C2H5O.CH2.CO2Na is sodium ethylthiolacetate C2H5S.CH2.CO2Na. Cf. thion-.
| 1899 Jrnl. Chem. Soc. LXXVI. i. 797 The authors adopt the Geneva nomenclature, thion being used to denote compounds containing the group .CS.OR, and thiol those containing the group .CO.SR. 1905 Ibid. LXXXVIII. i. 626 α-Thiolbutyric acid, SH.CHEt.CO2H, is an oil boiling at 118–122° under 19 mm. pressure. |