https://webbook.nist.gov/cgi/cbook.cgi?ID=B6993&Mask=40
(CF3CF=CF2)2..Br anion
branion
https://webbook.nist.gov/cgi/inchi?ID=B6992&Units=CAL&Mask=8
CF3CF=CF2..Br anion
branion
https://webbook.nist.gov/cgi/cbook.cgi?ID=B6993&Units=SI&Mask=8
(CF3CF=CF2)2..Br anion
branion
https://webbook.nist.gov/cgi/cbook.cgi?ID=B6990&Mask=40
(CF3CF=CF2)2..Cl anion
clanion
https://webbook.nist.gov/cgi/cbook.cgi?ID=B6995&Mask=40
(CF3CF=CF2)2..I anion
anion