Abstract
The reactions of manganese(II) chloride tetrahydrate and four bulky Schiff base ligands derived from amantadine (or rimantadine) and salicylaldehyde (or 4-methoxysalicylaldehyde) generated four novel complexes, C34H42Cl2MnN2O2 (I), C36H46Cl2MnN2O4 (II), C38H50Cl2MnN2O2 (III), and C40H54Cl2MnN2O4 (IV), respectively. These complexes were characterized by melting point, infrared spectra, elemental analysis, magnetic susceptibility, molar conductance and single-crystal X-ray diffraction (CIF files CCDC nos. 1 540 253 (I), 1 540 254 (II), 1 540 255 (III), 1 540 256 (IV)). Single-crystal X-ray diffraction analysis reveals that I, III and IV crystallize in the orthorhombic system with space groups P212121, Pbcn and Pcan, respectively, whereas II crystallizes in the monoclinic system with space group P21/n. Each asymmetric unit for I–IV consists of one manganese(II) atom, two Schiff base ligands and two chlorine atoms. The central manganese(II) atoms lie on a twofold rotation axis in III and IV, whereas manganese(II) atoms lie on general positions in I and II. In these complexes molecules, manganese(II) atoms is four-coordinated via two chlorine atoms and two oxygen atoms from the corresponding Schiff base ligands, forming a distorted tetrahedral geometry.
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