Ferromagnetically coupled gadolinium(III)copper(II) molecular material

The compound Gd 2 (ox) [Cu(pba)] 3 [Cu(H 2 O) 5 ]-20H 2 O (1), where ox stands for oxalato and pba for 1,3-propylenebis(oxamato), has been synthesized. 1 crystallizes in the monoclinic system, space group C2/m. The lattice parameters are a=21.18(7) A, b=21.098 (2) A, c=15.079 (1) A, and β=92.06 (2) o , with Z=4. The crystal structure consists of layers of double-sheet polymers separated by water molecules