THE SYNTHESES OF BIS(ETHYLENEDIAMINE)-TETRAMETHYLENEDIAMINE AND -DODECAMETHYLENEDIAMINE COBALT(III) COMPLEXES
Dimethylsulfoxide(DMSO) was found to be useful solvent for synthesizing various novel complexes. The reactions between cis- or trans-[CoCl2(en)2]+ and tetramethylenediamine or dodecamethylenediamine in DMSO produce new complexes, [Co(en)2(tmd)]n3n+ (n = 1 and 2), [Co(en)2(tmdH)2]5+, [Co(en)2(don)]n3n+ (n = 1 or 2) and [Co(en)2(donH)(H2O)]4+, where en, tmd, don, tmdH+ and donH+ denote ethylenediamine, tetramethylenediamine, dodecamethylenediamine, mono-protonated tetramethylenediamine and mono-protonated dodecamethylenediamine, respectively.