Structural analysis of powdered manganese(II) of 1,10-phenanthroline (phen) as ligand and trifluoroacetate (TFA) as counter anion

Abstract

The complex containing manganese(II), 1,10-phenanthroline (phen) as ligand and trifluoroacetate (TFA) as counter anion has been prepared and characterized. The electrical equivalent conductance, metal content, and TGA-DTA analysis suggests the complex to be [Mn(phen)3](TFA)2.1.35H2O. The magnetic moment was found to be normal high-spin paramagnetic for 5 unpaired electrons in the electron configuration of manganese(II). The electronic spectral bands indicates the five posible spin-forbidden transitions of sextet ground state to quartet excited states. The IR spectral data signify the mode of vibrations typical for phenanthroline as well as TFA, while the images of SEM-EDX photographs confirm the existence of the coresponding elemental content, they reflect high crystalinity of the complex as evidence of the sharp peaks of the corresponding powdered diffractogram. The analysis of powder XRD refined by Le Bail program was found to be structurally triclinic symmetry of P ? for the cationic complex with the cell parameters of a = 13.6422Å; b = 18.2792Å; c = 23.8741Åα = 114.42450;β = 94.83370; γ = 99.79770; V = 5261.6714Å3, Z = 1; with figure of merit: Rp = 1.31; Rwp = 2.39; Rexp = 0.56; Bragg R-Factor = 0.04; and GOF = 18.00.