The structure of [Cu2(Hdmg)4] (Hdmg=dimethylglyoxime anion) has been determined by X ray crystallography. It is monoclinic, space group P21/n, with Z=2. The lattice parameters: a=0.71601(14)nm; b=1.7044(3)nm; c=1.0126...The structure of [Cu2(Hdmg)4] (Hdmg=dimethylglyoxime anion) has been determined by X ray crystallography. It is monoclinic, space group P21/n, with Z=2. The lattice parameters: a=0.71601(14)nm; b=1.7044(3)nm; c=1.0126(4)nm; β =113.89(2)° ; Mr=587.52 (C16H28Cu2N8O8); V=1.1299(5)nm3. The copper atom lies in a distorted square pyramidal environment. The four equatorial donors are four nitrogen atoms from bidentate chelate dimethylglyoxime anion ligands. The oxygen atom from the dimethylglyoxime ligand acts as a bridging atom occupying the apical position of the symmetry related copper atom in the dimer structure. The two dimethylglyoximes bridge two copper atoms to form a six member Cu2O2N2 ring, respectively. The thermal gravity (TG) data indicate that the compound [Cu2(Hdmg)4] undergoes two exothermic reactions with loss of the organic ligand to give residue CuO. CCDC: 208729.展开更多
The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction....The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction. It crystallizes in a monoclinic system, the space group P2 1/c , a =0.951 2(2) nm, b =2.010 4(4) nm, c =1.202 5(2) nm, β =98.89(3)°, V =2.271 9(8) nm 3, Z=2, D c=1.599 Mg/m 3 , F (000) = 876 , R =0.059 1, wR =0.173 3, GOF(F)=1.009. The copper(Ⅱ) atom is five coordinated with four nitrogen atoms of the macrocyclic ligand and one nitrogen atom of imidazole. The stepwise stability constants of the 1∶1 and 2∶1 molar ratios of Cu to L and Zn to L complexes were determined by potentiometric titration in KCl supporting electrolyte(0.100 mol/L) at 25 ℃. The results indicated that zinc(Ⅱ) ion can form hydroxide bridged dinuclear complex [Zn 2(OH)L] 3+ , while the copper(Ⅱ) ion can only form dinuclear complex 3+ with macrocyclic ligand.展开更多
： The homobinuclear complexes of Cu(II) and Ni(II) with N,N′-bis(3-Carboxyl salicyl aminal ethylene) oxalamide were synthesized, and characterized by elemental analysis, IR spectra, Uv-visible spectra, conductometry...： The homobinuclear complexes of Cu(II) and Ni(II) with N,N′-bis(3-Carboxyl salicyl aminal ethylene) oxalamide were synthesized, and characterized by elemental analysis, IR spectra, Uv-visible spectra, conductometry, thermogravimetry, and magnetic susceptibility measurement, which indicated the complexes own an oxalic amide bridge-linking structure. Room temperature magnetic moment data show that there are antiferromagnetic spin coupling through oxalic amide conjugated double bond, In DMF, the redox half wave potential of Cu(II) binuclear complexes have been measured by cyclic voltammetry, which proves that the Cu(II) complex has two redox waves.展开更多
The transition metal and alkaline earth metal heterobinuclear complex[CuMg(TS)(H2O)·H2O],where TS is the schiff base N,N′ bis(3 carboxylsalidene)trimethylenediamine, was synthesised and its crystal structure was...The transition metal and alkaline earth metal heterobinuclear complex[CuMg(TS)(H2O)·H2O],where TS is the schiff base N,N′ bis(3 carboxylsalidene)trimethylenediamine, was synthesised and its crystal structure was determined by the single crystal X ray diffraction method at room temperature. It crystallizes in the monoclinic system, space group P21/n. The lattice parameters are a=12.041(2)?, b=14.736(3)?, c=12.062(2)?, β=118.00(3)°, Z=4 with R1=0.0364. The thermal property and EPR studies of the complex according to crystal structure are also investigated. CCDC: 182408.展开更多
文摘The structure of [Cu2(Hdmg)4] (Hdmg=dimethylglyoxime anion) has been determined by X ray crystallography. It is monoclinic, space group P21/n, with Z=2. The lattice parameters: a=0.71601(14)nm; b=1.7044(3)nm; c=1.0126(4)nm; β =113.89(2)° ; Mr=587.52 (C16H28Cu2N8O8); V=1.1299(5)nm3. The copper atom lies in a distorted square pyramidal environment. The four equatorial donors are four nitrogen atoms from bidentate chelate dimethylglyoxime anion ligands. The oxygen atom from the dimethylglyoxime ligand acts as a bridging atom occupying the apical position of the symmetry related copper atom in the dimer structure. The two dimethylglyoximes bridge two copper atoms to form a six member Cu2O2N2 ring, respectively. The thermal gravity (TG) data indicate that the compound [Cu2(Hdmg)4] undergoes two exothermic reactions with loss of the organic ligand to give residue CuO. CCDC: 208729.
文摘The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction. It crystallizes in a monoclinic system, the space group P2 1/c , a =0.951 2(2) nm, b =2.010 4(4) nm, c =1.202 5(2) nm, β =98.89(3)°, V =2.271 9(8) nm 3, Z=2, D c=1.599 Mg/m 3 , F (000) = 876 , R =0.059 1, wR =0.173 3, GOF(F)=1.009. The copper(Ⅱ) atom is five coordinated with four nitrogen atoms of the macrocyclic ligand and one nitrogen atom of imidazole. The stepwise stability constants of the 1∶1 and 2∶1 molar ratios of Cu to L and Zn to L complexes were determined by potentiometric titration in KCl supporting electrolyte(0.100 mol/L) at 25 ℃. The results indicated that zinc(Ⅱ) ion can form hydroxide bridged dinuclear complex [Zn 2(OH)L] 3+ , while the copper(Ⅱ) ion can only form dinuclear complex 3+ with macrocyclic ligand.
文摘： The homobinuclear complexes of Cu(II) and Ni(II) with N,N′-bis(3-Carboxyl salicyl aminal ethylene) oxalamide were synthesized, and characterized by elemental analysis, IR spectra, Uv-visible spectra, conductometry, thermogravimetry, and magnetic susceptibility measurement, which indicated the complexes own an oxalic amide bridge-linking structure. Room temperature magnetic moment data show that there are antiferromagnetic spin coupling through oxalic amide conjugated double bond, In DMF, the redox half wave potential of Cu(II) binuclear complexes have been measured by cyclic voltammetry, which proves that the Cu(II) complex has two redox waves.
文摘The transition metal and alkaline earth metal heterobinuclear complex[CuMg(TS)(H2O)·H2O],where TS is the schiff base N,N′ bis(3 carboxylsalidene)trimethylenediamine, was synthesised and its crystal structure was determined by the single crystal X ray diffraction method at room temperature. It crystallizes in the monoclinic system, space group P21/n. The lattice parameters are a=12.041(2)?, b=14.736(3)?, c=12.062(2)?, β=118.00(3)°, Z=4 with R1=0.0364. The thermal property and EPR studies of the complex according to crystal structure are also investigated. CCDC: 182408.
