Synthesis, structures, luminescence and magnetic properties of two dinuclear μ1,5 dicyanamide bridged copper(II) complexes containing a tetradentate N-donor Schiff base

Transition Metal Complexes with the Schiff Base Ligand 1‐{[2‐(2‐Hydroxyethylamino)ethylimino]methyl}naphthalen‐2‐ol

“…Considering the charge balance, the cobalt ion should have been oxidized aerobically from oxidation state +2 to +3. Similar oxidation has been observed in previous compounds,21 in which all the central metal atoms are trivalent and adopt octahedral coordination arrangement. The central Co III atom is hexacoordinate in a distorted octahedral N4O2 environment.…”

“…Also, the characteristic peak at δ = 8.79 ppm in the 1 H NMR spectrum further confirms the CH=N condensation. However, a downshift of the ν(C=N) band in all the compounds (1618–1630 cm –1 ) indicated coordination via the azomethine nitrogen ( M ←N) 21. The broad band at ca.3400 cm –1 is due to O–H stretching vibrations of the free hydroxyl group in both ligands and compounds.…”

Synthesis, characterization, crystal structure and predicting the second-order optical nonlinearity of a new dicobalt(III) complex with Schiff base ligand

“…These compounds form stable and variety complexes with the majority of transition metal ions that exhibit various electronic and structure characteristics [5][6][7][8][9]. Therefore, the research area containing the coordination compounds with azomethine ligands as main characters is widely expansive especially due to their potential interest roles in various interdisciplinary fields such as: structural features [10,11], efficient different catalytic processes in various organic reactions [12][13][14], models of the metal ion coordination sites in metalloproteins or enzymes at bioinorganic chemistry [15][16][17], magnetochemistry [18][19][20], corrosion inhibitors [21] and nonlinear optical materials [22][23][24]. Second-Order NLO organic materials such as Schiff base compounds have recently attracted attention owing to their potential applications in computers, optical communication and medical imaging [25,26].…”

Anion Modulated Structural Variations in Copper(II) Complexes with a Flexidentate Ligand Derived from 2-((2-aminoethyl)amino)ethan-1-ol: Synthesis and Spectroscopic and X-ray Structural Characterization

“…The design and synthesis of new transition metal complexes with polynuclating ligands, which represent themselves as potential chelating ligands with more than set of donor atoms, have been of interest for many years. [1][2][3][4][5][6][7] The ability of transition metal ions to bond to possible co-ordination sites of these ligands depends on the type of the metal ion, the donor atoms of the ligand, the flexibility of the ligand and the counter-anions used. The term "flexidentate" is used to describe the coordination behavior of this type of ligand.…”