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Synthesis, Structure And Properties Of Schiff Base Complexes And Ternary Complexes

Posted on:2007-10-12Degree:MasterType:Thesis
Country:ChinaCandidate:W ZhangFull Text:PDF
GTID:2121360185953925Subject:Inorganic Chemistry
Abstract/Summary:PDF Full Text Request
Schiff-base and its transition metal complexes have significant antiviral and antibacterial activities. Heteropolymetallic complexes are in the active fields of research encompassing life science and material science, especially the research on heteropolymetallic coupling complexes is the base of design of molecular material science. Much work has been devoted to study the Schiff-base complexes containing phenolic oxygens as bridges. The Schiff bases derived from 3-formyl-2-hydroxybenzoic acid and diamines are binucleating ligands with coordinative selectivity, their complexes MM'L·nH2O have been studied extensively. If a methyl group were added to 3-formyl-2-hydroxybenzoic acid, the alkalescence and field intensity of the base ligands should be enhanced obviously, thus, the electron spinning, magnetic behavior and catalytic property of the complexes maybe changed obviously.In view of reasons above, we designed and synthesized 5-methyl-3-carboxyl–salicylaldehyde, its Schiff-base ligands and corresponding complexes. These compounds were characterized by single-crystal X-ray analysis, 1H NMR, 13C NMR, IR, UV-vis, etc. The main contents are described as following:(1) The complex [Cu(OS)]·H2O, where H2OS is the N,N'-bis(salicylaldehyde) ethylenediamine, was obtained through selfassembly. Its crystal structure has been determined by X-ray analysis. The crystal belongs to trigonal system, space group R-3, a=3137.41(2)pm, b=3137.41(2)pm, c=918.100(10)pm,γ=120°, Z=18, R1=0.0425, wR2=0.1042. The copper atom is in a planar coordination site of [N2O2] and it devites from the mean plane by only 0.80 pm. Byπ-πstacking interactions, a alabastrine structure was obtained.(2)Schiff-base complex [Cu(HGS)(H2O)]·H2O, where H3GS is the 3-carboxyl -salicylidene glycine, was synthesized and characterized by elemental analysis, IR spectra and single-crystal analysis. The crystal belongs to monoclinic system, space group P2(1)/c, a=848.46(3)pm, b=681.54(3)pm, c=1967.16(8)pm,β=95.8210(10)°, Z=4, R1=0.0279, wR2=0.0724. The copper atom is in a square-pyramidal field with the base...
Keywords/Search Tags:Synthesis,
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