Synthesis and structural investigation of mono- and polynuclear copper complexes of 4-ethyl-1-(pyridin-2-yl) thiosemicarbazide

A New Thioamide Derivative for Separation and Preconcentration of Multi Elements in Aquatic Environment by Cloud Point Extraction

“…Also, two bands at 1512 and 1450 cm -1 were observed and assigned to thioamide I and III, respectively. Moreover, two sharp bands at 783 and 723 cm -1 were attributed to ν(C=S) and ρ(NH) [28]. The absence of any band due to ν(SH) in the range 2500 -2600 cm -1 [28] indicated that the ligand exists in the thione form.…”

“…The chemistry of these compounds was early explored [26] for their variable donor properties, structural diversity and biological applications. The coordination chemistry of a number of metal ions and a wide variety of complexes has been reported [27][28][29]. Thiosemicarbazides have been used for extraction and determination of some metal ions in biological and pharmacological samples [30][31][32].…”

“…Thiosemicarbazides have been used for extraction and determination of some metal ions in biological and pharmacological samples [30][31][32]. In recent studies, 4-Ethyl-1-(pyridin-2-yl)thiosemicarbazide and its Cu(II) complexes with different anions have been synthesized and characterized [28] and used as a chelating agent for separation, preconcentration, and determination of Cu(II) ions in saturated saline solutions by a cloud point extraction technique [33]. In addition to, complexes of 4-ethyl and 4-(p-tolyl)-1-(pyridin-2-yl)thiosemicarbazides with Pd(II), Pt(II) and Ag(I) were synthesized and characterizes [29] These complexes show antibacterial activity to some Gram positive and Gram negative bacterial strains.…”

Synthesis, spectral and structural studies on some new isonicotinic thiosemicarbazide complexes and its biological activity

“…The infrared spectrum of N-ethyl-2-isonicotinoylhydrazinecarbothioamide (HEITsc), in comparison with that of, displayed three bands at 3275, 3253 and 3127 cm -1 attributed to ν(N 4 H), ν(N 2 H) and ν(N 1 H) vibrations [24], respectively. Also, four bands were displayed at 2977, 1674, 1640 and 1599 cm -1 and assigned to ν(CH) ali , ν(C=O) [25], ν(C=N) Py , and ν(C=C) Py [24] vibrations, respectively.…”

Kinetic parameters and thermal decomposition for Novel 1,1-Malonyl-bis(4-p-Chlorophenylthiosemicarbazide) and Cu(II), Co(II), Zn(II) and Sn(II) complexes(H<sub>4</sub>pClMaTS) synthesized by electrochemical method

“…There are two main absorption bands in the spectra of the free ligand and their complexes; the first band is exhibited at the range 284 -308 nm and assigned to π-π* [31], and the second appeared at the range 330 -358 nm due to n-π* intraligand transitions [32]. These absorptions also present in the spectra of the Co(II), Cu(II) , Zn(II) and Sn(II) and [H 4 pClMaTS] ligand complexes, but they are shifted.…”