The synthesis of bis(N,N-diethylethylenediamine) nickel(II) complexes is an experiment that is reliable enough to be used at the undergraduate level alongside a course in inorganic chemistry. However, should nickel(II) hexahydrate be unavailable, cobalt(II) hexahydrate may be a possible alternative, though with different spectroscopic and colorimetric results. In order to assess the viability of using the cobalt(II) compound as a substitute metal, the method of synthesizing several bis(N,N-diethylethylenediamine) nickel(II) complexes was used, replacing the nickel(II) compound with the cobalt(II) compound. Multiple complexes appear to have formed with the cobalt(II) compound as a replacement.

Synthesis of bis(N,N-diethylethylenediamine) cobalt(II) complexes

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