A nickel(Ⅱ) cluster,{[Ni(L)H2O]2(OAc)2Ni}.2EtOH,has been synthesized by the means of the complexation of nickel(Ⅱ) acetate tetrahydrate with a new Salen-type bisoxime ligand (H2L,4,4'-dimethoxy-2,2'-[ethylen...A nickel(Ⅱ) cluster,{[Ni(L)H2O]2(OAc)2Ni}.2EtOH,has been synthesized by the means of the complexation of nickel(Ⅱ) acetate tetrahydrate with a new Salen-type bisoxime ligand (H2L,4,4'-dimethoxy-2,2'-[ethylenedioxybis (nitrilo-methylidyne)]diphenol). The crystal structure shows that the hexacoodinated terminal nickel(Ⅱ) ions lie in the N2O2 coordination sphere of Salen-type bisoxime ligands,quadruple μ-phenoxo oxygen atoms from two [NiL] chelates coordinated to the central nickel(Ⅱ) ion,and the two acetate anions coordinated to three nickel(Ⅱ) ions through Ni-O-C-O-Ni bridges. Thus,all the three nickel atoms of the cluster have distorted octahedral geometries. CCDC:736762.展开更多
The deamination reaction of \Cl 2 was studied by using the non-isothermal TG method. The data from the non-isothermal experiments were analyzed by means of ACHAR and COATS-REDFERN methods. It was found that the integr...The deamination reaction of \Cl 2 was studied by using the non-isothermal TG method. The data from the non-isothermal experiments were analyzed by means of ACHAR and COATS-REDFERN methods. It was found that the integral kinetic equation and differential coefficient kinetic eqution for the deamination of \l 2 were f（α）=\ -1, g（α）=α+（1-α）ln （1-α）, activation energies were E 1=81.223 6 kJ/mol, E 2=189.634 2 kJ/mol; pre-exponential factor A 1=4.10×10 9/s, A2=7.02×10 22/s, and kinetic compensation effect equation ln A1=3.519 6E 1+5.378 2; ln A 2=3.457 3E 2+4.804 5.展开更多
Triethanolammonium tetrachloronickelate was synhesized by a solid state reaction of triethanolamine hydrochloride with anhydrous nickel chloride. The compound undergoes a reversible thermochromism phase transition at ...Triethanolammonium tetrachloronickelate was synhesized by a solid state reaction of triethanolamine hydrochloride with anhydrous nickel chloride. The compound undergoes a reversible thermochromism phase transition at ca.152 ℃. UV-visible, near-IR, IR spectra and elemental analysis results confirmed the structure of the product. It was deduced that thermochromism of the product is caused by the structural phase transition of the complex ion, NiCl 2- 4. The enthalpy change of phase transition for the product was 61.0 kJ/mol determinated by DSC.展开更多
文摘A nickel(Ⅱ) cluster,{[Ni(L)H2O]2(OAc)2Ni}.2EtOH,has been synthesized by the means of the complexation of nickel(Ⅱ) acetate tetrahydrate with a new Salen-type bisoxime ligand (H2L,4,4'-dimethoxy-2,2'-[ethylenedioxybis (nitrilo-methylidyne)]diphenol). The crystal structure shows that the hexacoodinated terminal nickel(Ⅱ) ions lie in the N2O2 coordination sphere of Salen-type bisoxime ligands,quadruple μ-phenoxo oxygen atoms from two [NiL] chelates coordinated to the central nickel(Ⅱ) ion,and the two acetate anions coordinated to three nickel(Ⅱ) ions through Ni-O-C-O-Ni bridges. Thus,all the three nickel atoms of the cluster have distorted octahedral geometries. CCDC:736762.
文摘The deamination reaction of \Cl 2 was studied by using the non-isothermal TG method. The data from the non-isothermal experiments were analyzed by means of ACHAR and COATS-REDFERN methods. It was found that the integral kinetic equation and differential coefficient kinetic eqution for the deamination of \l 2 were f（α）=\ -1, g（α）=α+（1-α）ln （1-α）, activation energies were E 1=81.223 6 kJ/mol, E 2=189.634 2 kJ/mol; pre-exponential factor A 1=4.10×10 9/s, A2=7.02×10 22/s, and kinetic compensation effect equation ln A1=3.519 6E 1+5.378 2; ln A 2=3.457 3E 2+4.804 5.
文摘Triethanolammonium tetrachloronickelate was synhesized by a solid state reaction of triethanolamine hydrochloride with anhydrous nickel chloride. The compound undergoes a reversible thermochromism phase transition at ca.152 ℃. UV-visible, near-IR, IR spectra and elemental analysis results confirmed the structure of the product. It was deduced that thermochromism of the product is caused by the structural phase transition of the complex ion, NiCl 2- 4. The enthalpy change of phase transition for the product was 61.0 kJ/mol determinated by DSC.
