A new family of complexes derived from bis(imino)pyridine‐type ligands: Crystal structures and bio‐molecular interaction studies

Abstract

Bis(imino)pyridine (NNN)‐type ligand [(PyPhime‐Cina) = 2,6‐bis((E)‐1‐phenyl‐2‐((E)‐3‐phenylallylidene)hydrazinyl)pyridine] was synthesized, and a new family of metal complexes [Mn(PyPhime‐Cina)Cl2] (1), [Fe(PyPhime‐Cina)Cl2] (2), [Co(PyPhime‐Cina)Cl2] (3), [Ni(PyPhime‐Cina)Cl2] (4), and [Cu(PyPhime‐Cina)Cl2] (5), derived from the ligand, have been synthesized and characterized. Molecular structures of the ligand and complexes 1‐5 were determined using X‐ray crystallography. Electronic properties and frontier molecular orbitals of the complexes were investigated by DFT and TD‐DFT calculations. DNA interaction studies were evaluated by UV‐visible absorption, fluorescence and circular dichroism spectral studies which indicated noncovalent binding of complexes with CT‐DNA. Hirshfeld surface analysis of all the complexes was studied to know the weak interaction present in the molecules.

Design and synthesis of dinuclear cobalt(ii) complexes derived from strong π-acidic ligands: crystal structure and studies on the oxidation of sp3 C–H bonds

“…Based on the literature, 40,50,51 a plausible mechanism was proposed for this cobalt( ii )-catalysed alkane oxidation (shown in Scheme 6). When tert -butyl hydrogen peroxide (TBHP) is added to the solution of cobalt( ii ) complex ( A ) Co( ii ) alkyl peroxo species ( B ) formed.…”

“…37 A broad band near 515 nm due to ligand-to-metal charge transfer (LMCT) was shown by complex 2, which clearly indicated the ligation of the ligand with the metal centre. 40 The electronic spectral data for complexes 1 and 2 are shown in ESI † (Table S1), and spectra are shown in ESI † (Fig. S5 and S6).…”

Ruthenium(II) Tris‐Pyrazolylmethane Complexes in Transfer Hydrogenation Reactions

“…rhodium, iridium and rhenium) employed as catalytic precursors for the TH of ketones from isopropanol [9–14] . Among them, ruthenium compounds have played a leading role, [15–20] and related work in this area by Noyori was awarded with the Nobel Prize in 2001 [21] . A considerable number of ruthenium(II) arene complexes, bearing a wide diversity of co‐ligands, has been intensively investigated, showing a variable catalytic activity [22–30] .…”

Polar and nonpolar iron (II) complexes of isatin hydrazone derivatives as effective catalysts in oxidation reactions and their antimicrobial and anticancer activities

“…Consequently, many timely reported works for the oxidation of alcohols, for example, the catalytic action of Fe 2+/3+ ‐complexes of pyridylaminophenols, [ 16 ] carbohydrazides, [ 17 ] polydentate phosphines, [ 18 ] hydrazinylpyridine, [ 19 ] phenol‐pyrazoles, [ 20 ] aminophenolates, [ 21 ] pyridylimines, [ 22 ] phthalocyanines, [ 23 ] and azo‐arylhydrazones [ 24 ] were presented in the oxidation of primary and secondary alcohols and under various reaction conditions.…”