Organic selenocyanates can be reduced to the selenol, which readily oxidize to the diselenide:
:RSeCN  +  2e  →  RSe  +  CN
:RSe  +  H  →  RSeH
:2 RSeH  +  0.5O  →  RSeSeR  +  HO
Oxidation of selenocyanates gives the seleninic acids.