Two new Mannich and Schiff base ligands namely： （1-（3＇-amino-methyl-1＇（H）-1＇,2＇,4＇-triazole）-3-（1＇（H）-l＇,2＇,4＇- triazole-3＇-yl） iminoisatin （Lt） and l-morpholinomethyl-3-（1＇（H）-1＇,2＇,4＇-tr...Two new Mannich and Schiff base ligands namely： （1-（3＇-amino-methyl-1＇（H）-1＇,2＇,4＇-triazole）-3-（1＇（H）-l＇,2＇,4＇- triazole-3＇-yl） iminoisatin （Lt） and l-morpholinomethyl-3-（1＇（H）-1＇,2＇,4＇-triazolyl）iminoisatin （LII） were prepared from condensation reaction of the new Schiff base 3-（l＇（H）-l＇,2＇,4＇-triazole-3＇-yl）iminoisatin （SBH） （0.01 mol） with formaldehyde and 3-amino-l,2,4-triazole （3-At） or with formaldehyde and morpholine （0.01 mole each） respectively. Structures were characterized by tH NMR, CHN analyses, mass spectra and IR spectra. Metal complexes were synthesized by heating each ligand （0.02 mo with metal salts （0.01 moo in ethanol or ethanol： acetone mixture respectively. The formula of metal complexes were suggested depending on CHN and thermal analyses, metal and chloride contents, IR and UV-visible spectra, magnetic moments （laefr） and conductivity measurements. All complexes were of octahedral geometry except palladium （II） complexes which were square planar. The two ligands and some selected metal complexes showed various antibacterial and cytotoxic effects.展开更多
In this research two chromium（II][） and （VI） complexes of tetradentate Schiff bases have been prepared by condensing of salicylaldehyde with 4-methyl 1,2-phenylenediamine. Schiff base complexes of chromium（Ill） ...In this research two chromium（II][） and （VI） complexes of tetradentate Schiff bases have been prepared by condensing of salicylaldehyde with 4-methyl 1,2-phenylenediamine. Schiff base complexes of chromium（Ill） have been employed to design and synthesize polynuclear complexes. So they have played an important role in molecular magnetism. Synthesized complexes were characterized by elemental analysis, IR, molar conductivity and NMR. The free ligands were alsc characterized by 1H, 13C NMR spectra. The 13C NMR and IR spectra of free ligand and the complexes are compared and discussed.展开更多
Four cyanide-bridged heterometallic complexes { [CuPb（L1）][FenI（bpb）（CN）2] }2-（C104）2.2H20.2CH3CN （1）, { [CuPb（LI）]2[FeII （CN）6]（HzO）z}＇10H20 （2）, {[Cu2（L2）][Fent（bpb）（CN）2]2}＇2H20＇2CH3OH （...Four cyanide-bridged heterometallic complexes { [CuPb（L1）][FenI（bpb）（CN）2] }2-（C104）2.2H20.2CH3CN （1）, { [CuPb（LI）]2[FeII （CN）6]（HzO）z}＇10H20 （2）, {[Cu2（L2）][Fent（bpb）（CN）2]2}＇2H20＇2CH3OH （3） and {[Cu2（L2）]3[FeIII（CN）6]z（H20）2}-10H20 （4） have been synthesized by treating K[Fem（bpb）（CN）2] [bpb2-=l,2-bis（pyridine-2-carboxamido）benzenate] and K3[Feln（CN）]6 with dinuc[ear compartmental macrocyclic Schiff-base complexes [CuPh（LI）].（C104）2 or [Cu2（L2）]-（CIO4）2, in which H2LJ was derived from 2,6-diformyl-4-methyl-phenol, ethylenediamine, and diethylenetriamine in the molar ratio of 2：1：1 and H2L2 from 2,6-diformyl-4-methyl-phenol and propylenediamine in the molar ratio of 1：1. Single crystal X-ray diffraction analysis reveals that compound 1 displays a cyclic hexanuclear heterotrimetallic molecular structure with alternating [Fem（bpb）（CN）2]- and [CuPb（L＋）]2＋ units. Complex 2 is of a neutral dumb-bell-type pentanuclear molecular configuration consisting of one [Fe（CN）6]4- anion sandwiched in two [CuPu（L1）]2＋ cations, and the pentanuclear moieties are further connected by the hydro- gen bonding to give a 2D supramolecular framework. Heterobimetallic complex 3 is a tetranuclear molecule composed of a centrosymmetric [Cuz（L2）]2＋ segment and two terminal cyanide-containing blocks [Fetn（bpb）（CN）2]-. Octanuclear compound 4 is built from two [Fe（CN）6]3- anions sandwiched in the three [Cu2L2]2＋ cations. Investigation of their magnetic properties reveals the overall antiferromagnetic behavior in the series of complexes except 2.展开更多
基金supported by Gansu science and technology plan program (Grant No.18YF1GA054)the Program for Excellent Team of Scientific Research in Lanzhou Jiaotong University (Grant No.201706)~~
文摘Two new Mannich and Schiff base ligands namely： （1-（3＇-amino-methyl-1＇（H）-1＇,2＇,4＇-triazole）-3-（1＇（H）-l＇,2＇,4＇- triazole-3＇-yl） iminoisatin （Lt） and l-morpholinomethyl-3-（1＇（H）-1＇,2＇,4＇-triazolyl）iminoisatin （LII） were prepared from condensation reaction of the new Schiff base 3-（l＇（H）-l＇,2＇,4＇-triazole-3＇-yl）iminoisatin （SBH） （0.01 mol） with formaldehyde and 3-amino-l,2,4-triazole （3-At） or with formaldehyde and morpholine （0.01 mole each） respectively. Structures were characterized by tH NMR, CHN analyses, mass spectra and IR spectra. Metal complexes were synthesized by heating each ligand （0.02 mo with metal salts （0.01 moo in ethanol or ethanol： acetone mixture respectively. The formula of metal complexes were suggested depending on CHN and thermal analyses, metal and chloride contents, IR and UV-visible spectra, magnetic moments （laefr） and conductivity measurements. All complexes were of octahedral geometry except palladium （II） complexes which were square planar. The two ligands and some selected metal complexes showed various antibacterial and cytotoxic effects.
文摘In this research two chromium（II][） and （VI） complexes of tetradentate Schiff bases have been prepared by condensing of salicylaldehyde with 4-methyl 1,2-phenylenediamine. Schiff base complexes of chromium（Ill） have been employed to design and synthesize polynuclear complexes. So they have played an important role in molecular magnetism. Synthesized complexes were characterized by elemental analysis, IR, molar conductivity and NMR. The free ligands were alsc characterized by 1H, 13C NMR spectra. The 13C NMR and IR spectra of free ligand and the complexes are compared and discussed.
基金financially supported by the National Natural Science Foundation of ChinaMinistry of Education of China+1 种基金Beijing Municipal Commission of EducationFundamental Research Funds for the Central Universities
文摘Four cyanide-bridged heterometallic complexes { [CuPb（L1）][FenI（bpb）（CN）2] }2-（C104）2.2H20.2CH3CN （1）, { [CuPb（LI）]2[FeII （CN）6]（HzO）z}＇10H20 （2）, {[Cu2（L2）][Fent（bpb）（CN）2]2}＇2H20＇2CH3OH （3） and {[Cu2（L2）]3[FeIII（CN）6]z（H20）2}-10H20 （4） have been synthesized by treating K[Fem（bpb）（CN）2] [bpb2-=l,2-bis（pyridine-2-carboxamido）benzenate] and K3[Feln（CN）]6 with dinuc[ear compartmental macrocyclic Schiff-base complexes [CuPh（LI）].（C104）2 or [Cu2（L2）]-（CIO4）2, in which H2LJ was derived from 2,6-diformyl-4-methyl-phenol, ethylenediamine, and diethylenetriamine in the molar ratio of 2：1：1 and H2L2 from 2,6-diformyl-4-methyl-phenol and propylenediamine in the molar ratio of 1：1. Single crystal X-ray diffraction analysis reveals that compound 1 displays a cyclic hexanuclear heterotrimetallic molecular structure with alternating [Fem（bpb）（CN）2]- and [CuPb（L＋）]2＋ units. Complex 2 is of a neutral dumb-bell-type pentanuclear molecular configuration consisting of one [Fe（CN）6]4- anion sandwiched in two [CuPu（L1）]2＋ cations, and the pentanuclear moieties are further connected by the hydro- gen bonding to give a 2D supramolecular framework. Heterobimetallic complex 3 is a tetranuclear molecule composed of a centrosymmetric [Cuz（L2）]2＋ segment and two terminal cyanide-containing blocks [Fetn（bpb）（CN）2]-. Octanuclear compound 4 is built from two [Fe（CN）6]3- anions sandwiched in the three [Cu2L2]2＋ cations. Investigation of their magnetic properties reveals the overall antiferromagnetic behavior in the series of complexes except 2.
