Compounds having the structure RSeR (R ≠ H). They are thus selenium analogues of @E02221@.
Metal salts of selane, H2Se.
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1364 [Terms] [Paper]