Synthesis and Structural Characterization of Manganese(II) Complexes with N,N′-Bis(2-pyridylmethylene)-1,3-diaminopropan-2-ol or N,N′-Bis(2-pyridylmethylene)-1,3-propanediamine

Manganese(II) complexes with N,N′-bis(2-pyridylmethylene)-1,3-diaminopropan-2-ol (HL1) or N,N′-bis(2-pyridylmethylene)-1,3-propanediamine (L2), [Mn(HL1)(NO3)2] (1) and [Mn(HL1)(NCS)2] (2), [Mn(HL1)(phen)](ClO4)2 (3), [Mn2(L1)(CH3COO)(phen)2](ClO4)2 (4), [Mn(L2)(NO3)2] (5), [Mn(L2)(bpy)(CH3OH)](ClO4)2 (6), [Mn(L2)(NCS)2] (7), [Mn(L2)(phen)](ClO4)2 (8), have been synthesized and characterized by measurements of the infrared, electronic, and ESR spectra, and magnetic susceptibilities. The molecular structures of these complexes were determined by the single-crystal X-ray structure analysis. The complexes 1·C2H5OH and 5 have an eight-coordinated manganese atom with a square antiprism geometry. The complex 6 is seven-coordinated in a monocapped trigonal prism. The manganese atoms of 2, 7, and 8 are six-coordinated in a trigonal prism environment. The coordination environment of 3 is disordered between the seven- and six-coordinate geometries. The complex 4·H2O is a dinuclear molecule comprising two octahedral Mn(II) atoms.