Synthesis, Electrochemistry and Spectral Studies on Cobalt(II) and Manganese (II) Complexes with 12-,14-,15-, and 18-membered N4, N2O2, N2O2S, N6 Donor Macrocyclic Ligands

Abstract

donor macrocyclic ligands and their complexes with cobalt(II) and manganese(II) of the general composition ML,(NCS) 2 (where M 5 cobalt(II) and manganese(II) and ligands L 5 L 1 , L 2 , L 3 , and L 4 have been synthesized. All of the macrocyclic ligands and their complexes have been characterized by elemental analyses, IR, mass, 1 H NMR, magnetic moments, electronic and EPR spectral studies. The structures of the complexes and the various coordinating groups such as >C5 5N, >CONH, Ph2 2O2 2CH 2 2 2 and >NH are discussed. The redox properties of the complexes were examined by cyclic voltammetery. They exhibit a high potential Co(III)/Co(II) couple along with ligand reduction.

Synthesis and Characterization of Some Transition and Non-Transition Metal Complexes with New Cyclic and Open Series Containing (N, O) as Donor Atoms

“…δ(N-H) appears at (1311cm -1 ) (Chandra et al, 2004;Siddiqi et al, 2009), and the frequency assignable to (C=O) band at (1635cm -1 ) (Dey and Ray, 1974;Aggarwal and Narang, 1973).…”

“…The infrared spectrum of (L) ligand showed new bands in the range (3197, 3373 cm -1 ) which are corresponding to (NH) (Keypour et al, 2002;Chandra and Kumar, 2005) and (NH 2 ) (Dolaz et al, 2001) amine. δ(N-H) appears at (1311cm -1 ) (Chandra et al, 2004;Siddiqi et al, 2009), and the frequency assignable to (C=O) band at (1635cm -1 ) (Dey and Ray, 1974;Aggarwal and Narang, 1973).…”

“…The magnetic moment values for the Mn(II) complexes (1,8) have a magnetic moment values (5.85, 5.86 B.M) (Chandra et al, 2004;Ibrahim et al, 2014) while the electronic band at (31055, 32051, 28571, 37037 )cm -1 referring to charge translation range, indicating octahedral geometries structure (Satpute et al, 2015;Kheiri et al, 1977).…”

Synthesis, Characterization and Properties of Metal Complexes of Beta-diketonate Complexes

“…Solid product was precipitated in each case, which was washed with ethanol and recrystalised from ethyl acetate. The metals used for this purpose were TiCl 3 , FeCl 3 , VCl 3 . MnCl 3 , CoCl 3 , RuCl 3 , RuCl 2 .…”

“…Transition metals play a central role in the construction of molecular materials, which display magnetic properties and find applications in material and supramolecular chemistry and biochemistry [1][2][3][4] . Their complexes are well known for their biological importance as well as their anticarcinogenic, antibacterial and anti-fungal properties 5 .…”