The absolute configuration of (+)589-cis-[CoBr(C2H8N2)2(NH3)]2+ was confirmed to be Λ. The ethylenediamine five-membered chelate rings take the lel2 conformation. There are N—H⋯Br intermolecular hydrogen bonds with N⋯Br distances from 3.267 (9) to 3.715 (8) Å.
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NAKAGAWA et al. (1997) studied this question.