Schiff Base Complexes Thesis Statements

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Abstract

"One Schiff base ligand, bis(N,N-2-hyroxypropylenediaminesalicylaldimine), and its metal complexes were synthesized and characterized in this research. The synthesis was achieved by the condensation of salicylaldehyde with the amine group of 1,3- diamino-2-propanol in methanol. The mononuclear and dinuclear complexes from Schiff base with tradition metals Cu(Il) and Ni(II) were prepared by refluxing in ethanol. Detailed structural characterization of the ligand and its complexes was performed through NMR, magnetic susceptibility, UV-Vis spectroscopy, IR spectroscopy, and Xray structure analysis.

At room temperature, the effective magnetic moment of mononuclear Cu(ll) complexes is 1.82BM confirming the presence of one unpaired electron. It is distorted tetrahedral geometry and paramagnetic. The mononuclear Ni(Il) complex possesses the effective magnetic moment, μeff, 3.18BM which shows the presence of two unpaired electrons and paramagnetism. The magnetic properties are explained with a modified Bleaney-Bowers equation. This suggests a strong antiferromagnetic exchange interaction between two copper atoms in a dimeric complex.

It was found through the X-ray structure analysis that the mononuclear Cu(II) complex possesses the triclinic lattice type and P-1 space group. The unit cell parameters are a= 7 .823(4)Å; b = 9.688(5)Å; c = 10. 715( 6 )Å; α = 91.56(1)°; ß = 104.40(1)° ; and γ = 95.53(1)°. The crystal system of dinuclear Cu(II) complex is a monoclinic lattice type and P2₁/c space group. The unit cell parameters are a= 18.084(2)Å; b = 20.869(2)Å; c = 9.894(1)Å; and ß = 95.437(2)°"--Abstract, page iii.

Recommended Citation

Wang, Lili, "Synthesis and characterization of some Schiff base metal complexes" (2006). Masters Theses. 5906.
http://scholarsmine.mst.edu/masters_theses/5906

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