Vibrational Spectra of the thioglycolate complexes of Zn(II) and Cd(II), structure and natural bond orbitals
DOI:
https://doi.org/10.33448/rsd-v12i7.42678Keywords:
Complexos tioglicolatos de Zn(II) e Cd(II); Espectros vibracionais; Análise orbital de ligação natural (NBO).Abstract
The objective of this research was to characterize the vibrational spectrum of the Zn(II) and Cd(II) thioglycolate complexes, as well as their structures, vibrational analysis and the natural orbitals of bonds, through the infrared spectrum with Fourier transform (FT -IR) and Raman. The thioglycolate complexes of Zn(II) and Cd(II) were synthesized following procedures given by the graphical method, and structural analysis was performed through a theoretical-experimental method using both, the hybrid RHF/MP2:STO-3G and the experimental FT-IR and FT-Raman spectra. Calculations were performed on the optimized structure and harmonic vibrational wavenumbers for both complexes were obtained. Second derivative of the vibrational spectra and deconvolution analysis were also performed. The infrared and Raman spectra show many combination and overtone bands in both cases. Calculated and experimental spectra confirmed the structural hypothesis considering two ATG (thioglycolic acid) with two water molecules in the coordination sphere of the central atoms. The natural bond orbital analysis (NBO) was also carried out to study the Zn(II) and Cd(II) hybridization leading to a pseudo-octahedral geometry for both complexes.
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Copyright (c) 2023 Renata Batista dos Santos Pinheiro; Anilton Coelho da Costa Junior; Claudio Andrés Téllez Zepeda; Kátia Magaly Pires Ricarte; Maria Antonieta Mondragón; Otávio Versiane Cabral; Claudio Alberto Téllez Soto
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