Bis(4-ammonio-4-methylpentan-2-one-κO)dioxalato-κ4 O 1,O 2-copper(II)

The title compound, [Cu(C2O4)2(C6H14NO)2], was synthesized by mixing diacetonamine hydrogen oxalate and copper sulfate in ethanol/water. The molecule is centrosymmetric, so two pairs of equivalent ligands lie trans to each other. The CuII center, located on a position with 2/m site symmetry, is six-coordinated by four O atoms from two oxalate ligands at short distances and the carbonyl O atoms from the 4-amino-4-methylpentan-2-one ligands at longer distances. Molecules are linked through intermolecular N—H⋯O hydrogen bonds between the amino groups and carbonyl O atoms; no intramolecular hydrogen bonds are formed.