Infrared Spectral and Magnetic Properties of Basic Copper(ii) Nitrate Produced by Slow Titration Method

Abstract

The main purposes for this work are to formulate and characterize the infrared (IR) and magnetic moment of the compounds resulted from the slow titration of copper(II) nitrate with sodium hydroxide and in the reverse procedures in an aqueous solution. The titration is carried out with various concentrations and at a constant temperature, ⁓ 19 oC, and monitored using pH meter with the rate of the titration⁓ 1 mL per minute. The corresponding data of change in mole ratio of Cu2+/OH- against pH reveals that the end point of the titration occurs at pH about 8, leading to stoichiometry formula, 3Cu(NO3)2.5Cu(OH)2, but Cu(NO3)2.5Cu(OH)2 in the reverse procedure (OH-/Cu2+). The pale blue for the former but deep blue compounds were isolated and then characterized IR spectroscopy and magnetic moment. Both compounds containing nitrate ion are evident from the corresponding IR spectra, and their magnetic moment values which were found in the range of 1.7-1.9 BM, are to be normal for copper(II) salt corresponding to one unpaired electron in the electronic configuration.

Synthesis, Physicochemical Elucidation and Biological Screening Study of New Ligand Derived From 5,6-O-Iso Propylidene-L-Ascorbic Acid and Its Metal(ii) Complexes

“…The magnetic moment obtained in this investigation, 3.16, was in the expected range like octahedral Ni(II) ions (Ahmed et al, 2016). The Cu(II) complex magnetic moment was 1.76 B.M., and it was rather near to the spin value expected for one unpaired electron at 1.73 B.M.. As a result, the Cu(II) complex has the structure of an octahedron (Mutlu et al, 2020;Padmaningrum et al, 2022). According to Sanchez-Lara et al, 2021, the diamagnetic magnetic moments values of the metal complexes Zn(II) and Cd(II) are equal to those of the (d 10 ) configuration.…”

“…Table 3 shows the conductivity values. Earlier studies (Ahmed et al, 2016;Mutlu et al, 2020;Nisah et al, 2021;Padmaningrum et al, 2022) have examined the coordination sites available in the ligand and how they are related to various metal ions. The spectroscopic and analytical results based on the molar ratio, elemental analysis metal contents, magnetic measurements and the molar electrical conductivity measurements, as well as the results of the 1 H-NMR spectrum, the 13 C-NMR spectrum, the UV-Vis spectra and the infrared (FT-IR) spectra all indicated the complexes had octahedral geometry where the ligand behaved as tridentate coordination process.…”