Synthesis, structural, spectroscopic characterization, and structural comparison of 3-hydroxybenzoate and nicotinamide/N,N-diethylnicotinamide mixed ligand complexes with Zn(II)

Abstract

The mixed-ligand 3-hydroxybenzoic acid complex of Zn(II) with nicotinamide and N,N-diethylnicotinamide were synthesized and characterized (colorless single crystals, [Zn(3-hba) 2 (H 2 O) 2 (na) 2 ] and [Zn(3-hba) 2 (H 2 O) 2 (dena) 2 ]). The chemical, FT-IR, thermal, mass spectral analyses, and X-ray data results revealed that both of the compounds contain two water molecules, two 3-hydroxybenzoate (3-hba) and two nicotinamide (na) or two N,N-diethylnicotinamide (dena) ligands per formula unit. 3-hba and na or dena ligands bind to the Zn(II) ion monodentately through their acidic oxygen and pyridinic nitrogen atoms, respectively. The coordination of metal atoms are completed by two molecules of aqua ligands. The charge balance of complexes is accommodated by two molecules of 3-hba ions. The unit cell has two molecules coordination molecules and each of them was as settled to four surfaces of unit cell cage in na complex. There is one mole molecule that was occupied to center of unit cell cage in dena complex. The two dimensional network structure of the complex is like a hexagonal for na and square plane for dena complexes. The thermal decomposition takes place in three steps; first, dehydration of the two aqua ligands, second, elimination of the two nicotinamide ligands, finally, burning of the two benzoate ion ligands.

Mixed ligand complexes of acesulfame/nicotinamide with earth alkaline metal cations Mg(II), Ca(II), Ba(II) and Sr(II): synthesis and characterization

“…As a result of spectral investigation of complexes between nicotinamide and these metals, it was determined that it has ability to bind as monodentate ligand through pyridine nitrogen. [19][20][21].…”

Synthesis and Thermal Characterization of p-Coumaric Acid Complexes of CoII, NiII, CuII and ZnII Metal Cations and Biological Applications

“…The maximum adsorption band of broaden spectrum owned by Cu II (VII) complex corresponded to the wavelength of approximately 677.49 nm ( 2 E g → 2 T 2g ) [28,29]. There was no any d-d electronic transition for an octahedral splitting possible to occur because fully occupied d orbitals in the last orbit of Zn II (VIII) complex with the diamagnetic feature as seen from the magnetic susceptibility data ( Figure 5) [30][31][32].…”

Schottky type photodiodes with organic Co‐complex and Cd‐complex interlayers

“…Schemes 2 and 3 show the synthesis reaction scheme of Co(II) cation and Cd(II) cation centered nicotinic S C H E M E 1 Synthesis reaction scheme of sodium salt nicotinicate S C H E M E 2 Synthesis reaction scheme of Co(II) cation centered nicotinic acid/N,Ndiethylnicotinamide mixed ligand complex acid/N,N-diethylnicotinamide mixed ligand complex, respectively. The final total solution was stirred on a magnetic stirrer hot-plate at 60 C for 5 h. [25,55] The beaker in which it was transferred was covered with a perforated paraffin film and left to stand until crystal formation. After about 10-15 days, the respective metal cation complexes were allowed to aggregate as crystals of dark-pink for Co(II) and pale white for Cd(II) and stored for structural analysis.…”