N,N'-(2,6-diazido-1,4-phenylene)bis(4-chlorobenzenesulfonamide)

N,N'-(5,6-dibromocyclohex-2-ene-1,4-diylidene)bis(4-chlorobenzenesulfonamide)

N,N'-(3,6-dioxocyclohexa-1,4-diene-1,4-diyl)bis(4-chlorobenzenesulfonamide)

N,N'-(perchlorocyclohexa-2,5-diene-1,4-diylidene)bis(4-chlorobenzenesulfonamide)