Selenonic acid

A selenonic acid is an organoselenium compound containing the \sSeO3H functional group. The formula of selenonic acids is R\sSe(\dO)2\sOH, where R is organyl group. Selenonic acids are the selenium analogs of sulfonic acids. Examples of the acid are rare. Benzeneselenonic acid PhSeO3H (where Ph stands for phenyl) is a white solid. It can be prepared by the oxidation of benzeneselenol.