# Which functional group is -CSSH?

If we replace two oxygen in $\ce{-COOH}$ what is the name of the compound we get?

• Does that functional group even exist? If so, do you have an example of a molecule containing it? – Michiel Dec 10 '13 at 17:02
• Yes the compound exists, it is formed when grignard reagent reacts with thioxide. – user2619 Dec 10 '13 at 17:46

## 1 Answer

Is a dithioic acid.

For example, a benzene with two -CSSH hubstituents in 1, 2 positions is a benzene-1,2-dicarbodithioic acid.

• Here's a neat reference containing all sorts of information about carboxylic acid analogues contaning heavier chalcogens. – Nicolau Saker Neto Dec 10 '13 at 22:39
• isn't it just a thioic acid? that thio there means sulfur so why is it a dithioic acid instead of just thioic acid? – Caters Aug 1 '14 at 18:42
• @Caters, likely because '-thioic acid' would imply replacement of only one of the oxygens with a sulfur, instead of both. – hBy2Py Jul 1 '15 at 19:31