Species carrying two positive charges, formally located on tervalent carbon atoms,
e.g.
+CH2–+CH2
ethane-1,2-diyl dication,
+CH2CH2–+CH2
propane-1,3-bis(ylium).
Source:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on
structure (IUPAC Recommendations 1995))
on page 1332