A novel organically templated hybrid open-framework manganese phosphate-oxalate

A novel hybrid open-framework manganese phosphate-oxalate templated with an organic amine, [CH3NH2CH3][Mn2(OH2)(HPO4)(C2O4)1.5], has been hydrothermally synthesized and structurally characterized. The light pink compound crystallizes in a triclinic system of space group P1¯ (No. 2), with lattice parameters a=8.3014(1)Å, b=9.740(2)Å, c=7.744(2)Å, α=102.32(2)°, β=93.38(2)°, γ=75.90(1)°, V=572.7(2)Å3. In this structure, MnO6 octahedra, PO4 tetrahedra and C2O4 groups are linked to give rise to a three-dimensional open framework containing channels with 10-, 8- and 10-membered windows running along the a, b and c axis, respectively. The organic template diethylenetriamine lies disorderedly in the interspace of the channels along the c axis. The compound is an antiferromagnet with a TN=9K.