{Δ-1,4,7,10-Tetrakis[(S)-2-hydroxy­propyl-κO]-1,4,7,10-tetra­aza­cyclo­do­dec­ane-κ⁴N}cad­mium(II) 4-nitrophenolate per­chlor­ate hydrate

Crystallization of [Cd(S-thpc12)](ClO₄)₂·H₂O {S-thpc12 is 1,4,7,10-tetra­kis[(S)-2-hy­drox­y­propyl]-1,4,7,10-tetra­aza­cy­clo-do­dec­ane} in the presence of sodium p-nitrophenolate forms the title complex, [Cd(C₂₀H₄₄N₄O₄)](C₆H₄NO₃)(ClO₄)·H₂O, in which p-nitrophenolate and water separately hydrogen bond to a different pair of cis-related pendant hydroxyl groups which, together with the four N atoms, are themselves bound to Cd^II in an approximately square antiprismatic arrangement. The diastereoselectivity of the complex-forming process is apparent from the fact that both different disymmetric cations in the asymmetric unit have the same Δ helicity.