The type of isomerism shown by Coen2NCS2Cl and Coen2NCSClNCS is:
ionization
coordination
linkage
all of these
On ionization different species are formed to show ionization isomerism:
Coen2NCS2Cl⇌COen2NCS2++Cl−Coen2NCSClNCS⇌COen2NCSCl++NCS−