Synthesis, Crystal Structure, and Magnetic Property of four Manganese(II) Complexes with Bulky Schiff bases Derived from Amantadine and Rimantadine

摘要

The reactions of manganese(II) chloride tetrahydrate and four bulky Schiff base ligands derived from amantadine (or rimantadine) and salicylaldehyde (or 4-methoxysalicylaldehyde) generated fournovelcomplexes, 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. 1540253 (I), 1540254 (II), 1540255 (III), 1540256 (IV)). Single-crystal X-ray diffraction analysis reveals that I, III and IV crystallize in the orthorhombic system with space groups P2(1)2(1)2(1), Pbcn and Pcan, respectively, whereas II crystallizes in the monoclinic system with space group P2(1)/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.