Synthesis and Characterization of Co(II), Ni(II), Cu(II), and Zn(II) Complexes with 2-Furaldehyde-2- Thenoylhydrazone

Abstract

Three types of Metal(II) complexes with hydrazone derived from condensation of thiophene-2-carboxylic acid hydrazide and 2-furaldehyde namely 2-furaldehyde-2thenoylhydrazone (fth) of the general formulas [M (fth-H) 2 ],[M(fth) 2 Cl 2 ] and [M(fth) 2 ] (NO 3) 2 , where M= Co(II), Ni(II), Cu(II), and Zn(II), were synthesized and characterized on the basis of elemental analysis, molar conductance, magnetic moment, infrared and electronic spectral data. The infrared and molar conductance data of the complexes reveal the monobasic tridentate ONO nature of the ligand and coordination through the enolate oxygen, furan ring oxygen and azomethine nitrogen atoms, in the complexes [M(fth-H 2)] upon deprotonation of the ligand. The same ligand acts as neutral bidentate ON in the chloro-complexes coordinated through the carbonyl oxygen and azomethine nitrogen atoms and neutral tridentate ONO in the nitrate complexes coordination through carbonyl oxygen and furan ring oxygen atoms in addition to the azomethine nitrogen atom. The magnetic and electronic spectral data suggested an octahedral geometry for the complexes.

Synthesis, Characterization, and Computational Study of Novel 2-Phenoxyethyl Xanthate Ligand and Complexes with some Transitions Metals

“…The length of (M-S1, M-S2, M-S3 and M-S4) bonds were found in the range [(1.741-2.323), (1.755-2.322), (1.750-2.324), (1.745-2.323)] respectively, which are acceptance with complexes prepared by Abrahams 14,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] . Furthermore, the relatively identical bond length for (C1-S1) and (C1-S2) that observed in the range…”

“…The prepared complex is diamagnetic which is expected for d 10 ion. According to effective magnetic moment, these metals do not show (d-d) transition 25,26 .…”