The Crystal Structure of Monoclinic Copper(II)-hydrogen-(1)-Malate Dihydrate

Copper(II)-hydrogen-(1)-malate crystallises in the monoclinic space group P1. Characteristics of the unit cell are: a=7.589 A, b=8.158 A, c=10.210 A, γ=87.28° and Z=2, with chemical composition Cu(C4O5H5)2.2H2O. The Cu2+ ion is coordinated by six oxygen atoms, all originating from the hydrogen malate ions. Two Cu-O distances are elongated due to the Jahn-Teller effect. The two crystallographically independent malate ions have significantly different geometries.