Manganese(II) complexes with edta-type ligands. The molecular structure of aquo-dihydrogen(1,2-propanediamine-N,N,N′,N′-tetraacetate)manganese(II) trihydrate, [Mn(H21,2-pdta)(H2O)] · 3H2O

New manganese(II) complexes with ethylenediamine-N,N,N′,N′-tetra-3-propionate (edtp) and 1,2-propanediamine-N,N,N′,N′-tetraacetate (1,2-pdta) were prepared and characterized by elemental analysis, i.r. spectroscopy and magnetic measurements. The structure of [Mn(H21,2-pdta)(H2O] · 3H2O was determined by the single crystal X-ray diffraction technique. The complex crystallizes in the space group P21/n(#14) of the monoclinic crystal system with unit cell parameters a = 10.993(2) A, b = 14.092(2) A, c = 11.753(1) A, β= 96.302(9)0, V = 1809.7(3) A3, Z = 4 and R = 0.051. The complex contains seven-coordinated MnII ion with H21,2-pdta ion acting as hexadentate ligand and one water molecule.