Crystal structure of cis-bis­(μ-β-alanine-κ2 O:O′)bis[tri­chlorido­rhenium(III)](Re–Re) sesquihydrate

A dirhenium(III) cis-di­carboxyl­ate complex is reported, which is representative of a small class of zwitterionic ammonia­carboxyl­ato complexes involving a quadruple metal–metal bond.