Abstract
Series of coordination complexes of Ni(II), Cu(II), Zn(II), Cd(II) and Sn(II) metal with 4-amino-5-(pyridyl)-4H-1,2,4-triazole-3-thiol, as a ligand has been successfully prepared in alcoholic medium. The prepared complexes were characterized quantitatively and qualitatively by using: microelemental analysis, FTIR spectroscopy, UV-visible spectroscopy, 1H and 13C NMR, magnetic susceptibility and conductivity measurements. This triazole ligand act as bidentate that coordination to the metal ions through sulphur and amine group. According to the spectral data of the complexes a tetrahedral geometry was suggested for these complexes except Cu (II) complexes which exhibit a square structure.
Highlights
Heterocyclic chemistry has become a separate field of chemistry with long history, present society and future prospects
Infra-red spectroscopy The FTIR spectrum of this ligand (L) showed some characteristic stretching bands at: 3250 and 3213, 2736, 1645, 673 assigned to NH2, S-H, C = N of triazole ring, and the last one is for stretching of C-S bond, respectively which could be found in complexes 1-5 (Pavia et al, 2001), (Silvertein and Bassler, 1980), (Majeed, 2010), (Yousif et al, 2005)
The ligand can link with the metal ion at either by N or the S of thioamid group
Summary
Heterocyclic chemistry has become a separate field of chemistry with long history, present society and future prospects. Heterocyclic compounds are considered one of an important type of organic compounds due to their implication in drugs and industrial studies (Carey 1980), (Acheson, 1989), (Zamani et al, 2004). Triazoles are five memberd heterocyclic compounds with molecular formula C2H3N3 containing three nitrogen and two carbon atoms (Siddiqui et al, 2011). Triazole are considered to be good coordinating ligands (Al-Maydama et al, 2008), because they involved both hard nitrogen and soft sulfur atom as thio amide group. This ligand have doner group that coordinate with wide range of metal ions (Narayana and Gajendragad, 1997).
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