Molecular tristability of Co^II(salen)-based (salen = N,N’-ethylene-bis(salicylideniminato) compounds

The magnetic behaviors of Co(II) complexes of N,N’-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminato, N,N’-bis(3-chlorosalicylidene)-1,2-cyclohexanediaminato, N,N’-bis(3,5-dichlorosalicylidene)-1,2-cyclohexanediaminato, (3-nitrosalicylidene)-1,2-cyclohexanediaminato, N,N’-bis(3,5-dinitrosalicylidene)-1,2-cyclohexanediaminato, and N,N’-diaminomaleonitrilebis(salicylideniminato) were studied to identify the presence molecular tristability that is observed for the parent Co^IIsalen (salen = ethylenebis(salicylideniminato)). N,N’-bis(3,5-dinitrosalicylidene)-1,2-cyclohexane-diaminato(2-)cobalt(II) exhibited tristable behavior similar to Co^IIsalen, and it is anticipated to have a dimeric structure.