Λ L Λ L ‐Bis(μ‐ l ‐cysteinato)‐1:2κ 3 S : N , S ;1:3κ 3 S : N , S ‐tetrakis(ethylenediamine)‐2κ 4 N , N ′;3κ 4 N , N ′‐dicobalt(III)silver(I) tris(perchlorate) pentahydrate

In the crystal structure of the title compound, Λ L Λ L ‐[AgCo 2 (C 3 H 5 NO 2 S) 2 (C 2 H 8 N 2 ) 4 ](ClO 4 ) 3 ·5H 2 O, the Ag I atom, which lies on a twofold rotation axis, is linearly coordinated by two thiolate S atoms from two Λ L ‐[Co(C 3 H 5 NO 2 S)(C 2 H 8 N 2 ) 2 ] + octahedral units, forming an S‐bridged Co III –Ag I –Co III trinuclear unit. The compound has two uncoordinated carboxylate groups.