NDLI: Synthesis, thermal studies and spectral characterization of Co(II), Ni(II), Cu(II), and Zn(II) complexes with some polymeric diacetyl acyldihydrazone ligands

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Synthesis, thermal studies and spectral characterization of Co(II), Ni(II), Cu(II), and Zn(II) complexes with some polymeric diacetyl acyldihydrazone ligands

Content Provider	Springer Nature Link
Author	Singh, Vinod Prasad Singh, Divya Pratap
Copyright Year	2013
Abstract	Two polymeric ligands, diacetyl oxaloyldihydrazone (DODH), diacetyl malonoylhydrazone (DMDH) and their Co(II), Ni(II), Cu(II) and Zn(II) complexes were synthesized and characterized by elemental analyses, IR, mass, $^{1}$H & $^{13}$C NMR, ESR and electronic spectral studies. The ligands and their complexes are highly insoluble in water and common organic solvents and decompose at high temperature. The metal atoms are embedded between two polymeric chains of the organic ligands and the monomeric unit of the polymeric chain behaves as a neutral bidentate ligand and coordinate through two >C=N groups to different metals as indicated by $^{1}$H & $^{13}$C NMR and IR spectral studies. The molecular weights determined by $^{1}$H NMR and mass spectral studies suggest oligomeric nature of the ligands and their Zn(II) complexes. The magnetic susceptibility measurements and electronic spectral studies indicate a square planar geometry around the metal ion in Co(II) and Ni(II) complexes. Electronic and ESR spectral studies for Cu(II) complexes suggest a distorted octahedral stereochemistry around the metal atom and $^{2}$B$_{1g}$ as the ground state. Thermal studies (TGA and DTA) of some of the complexes in inert atmosphere show a multi-step exothermic decomposition of the bonded organic ligand at high temperature and metal (II) chloride as the end product.
Starting Page	757
Ending Page	766
Page Count	10
File Format	PDF
ISSN	15985032
Journal	Macromolecular Research
Volume Number	21
Issue Number	7
e-ISSN	20927673
Language	English
Publisher	The Polymer Society of Korea
Publisher Date	2013-02-09
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	polymeric metal complexes acyldihydrazones thermal studies NMR spectra ESR spectra mass spectrometry Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Physical Chemistry Characterization and Evaluation of Materials Nanochemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Materials Chemistry Chemical Engineering Polymers and Plastics

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