Synthesis and characterization of some pyrimidine, purine, amino acid and mixed ligand complexes

Mn II, Fe III, Co II, Ni II, Cu II, Zn II and Cd II complexes of barbital, thiouracil, adenine, amino acids (methionine, lysine and alanine) and some mixed ligands were prepared and characterized by elemental analyses, IR, electronic spectra, magnetic susceptibility and ESR spectra. Coordination of...

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Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2008, Vol.69 (1), p.230-238
Main Authors: Masoud, Mamdouh S., Amira, Mohamed F., Ramadan, Ahmed M., El-Ashry, Ghada M.
Format: Article
Language:English
Subjects:
Adenine - chemistry
Amino Acids - chemical synthesis
Amino Acids - chemistry
Barbital - chemistry
Complexes
Electrons
ESR spectra
Ligands
Magnetics
Metals - chemistry
Mixed ligands
Purines - chemical synthesis
Purines - chemistry
Purines amino acids
Pyrimidines
Pyrimidines - chemical synthesis
Pyrimidines - chemistry
Spectrophotometry, Infrared
Sperctroscopic characterization
Thiouracil - chemistry
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Summary:Mn II, Fe III, Co II, Ni II, Cu II, Zn II and Cd II complexes of barbital, thiouracil, adenine, amino acids (methionine, lysine and alanine) and some mixed ligands were prepared and characterized by elemental analyses, IR, electronic spectra, magnetic susceptibility and ESR spectra. Coordination of the metallic centre to the oxygen and nitrogen atoms of barbital, thiouracil, amino acids and coordinate to amino group and nitrogen atom of adenine occurred. Electronic spectra and magnetic susceptibility measurements were utilized to infer the structure of the complexes which are octahedral for Mn II, Fe III, Co II, Ni II and Cd II and tetrahedral for Mn II, Cu II, Zn II complexes. ESR spectra were observed for copper complexes with a d x 2 − y 2 ground state with small g || values indicating strong interaction between the ligands and their metal ions.
ISSN:1386-1425
DOI:10.1016/j.saa.2007.03.039