for the following products
2,2'-(2,3,5,6-Tetrafluoro-2,5-cyclohexadiene-1,4-diylidene)bis-propanedinitrile | 2,2'-(Perfluorocyclohexa-2,5-diene-1,4-diylidene)dimalononitrile | 2,3,5,6-Tetrafluorotetracyanoquinodimethane and 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane
