Functionalized organozinc reagents can easily under 1, 4-addition reaction withunsaturated esters in the presence of catalytic amount of Ni (acac)_2 and tertiary ammes under verymild conditions to give the products in...Functionalized organozinc reagents can easily under 1, 4-addition reaction withunsaturated esters in the presence of catalytic amount of Ni (acac)_2 and tertiary ammes under verymild conditions to give the products in excellent yields.展开更多
The spectrophotometric characteristic of a new reagent 1, 4, 9, 12-tetraaza Cyclo-2, 3, 6, 7, 10, 11, 14, 15 tetrabenzocetanan-5, 8, 13, 16-tetraone (TCTCT) and its complex with Cu(Ⅱ) were studied. The reagent and i...The spectrophotometric characteristic of a new reagent 1, 4, 9, 12-tetraaza Cyclo-2, 3, 6, 7, 10, 11, 14, 15 tetrabenzocetanan-5, 8, 13, 16-tetraone (TCTCT) and its complex with Cu(Ⅱ) were studied. The reagent and its complex with Cu(Ⅱ) have a similar maximum absorbance at 446 um. In C6H4(C2O4HK)-NaOH buffer (pH=4.00), the complex of Cu(Ⅱ)-TCTCT formed when it was heated. The absorbance increased with the increase of the concentration of Cu(Ⅱ) in the range of 1 .6x10-7-5.5x 10-5 mol/L. The composition ratio of the complex was formed to be 1: 1 using the molar ratio method. The method was simple, rapid and sensitive, giving an apparent molar absorptivity of 1.25x105 L mol-1 cm-1 and the apparent stability constant of 1 .04x106. The method was directly applied of copper in fresh milk.展开更多
The dielectric property of organic reagent is key to the study of Microwave-assisatant organic synthesization.The data of complex permittivity of these organic reagents can not be obtained easy.The complex permittvity...The dielectric property of organic reagent is key to the study of Microwave-assisatant organic synthesization.The data of complex permittivity of these organic reagents can not be obtained easy.The complex permittvity of these organic regents were measured in 2.45 GHz by cavity perturbation method.The result shows that the real and imaginary parts of the permittivity of alcohol are larger than others.The real part of the complex permittivity of ketone is larger and the imaginary part is smaller.The real and imaginary parts of the permittivity of acid are smaller.The real and imaginary parts of the permittivity of alkyl and benzene are the smallest.The real part and the imaginary parts of the permittivity of all decrease while the increasing of the number of carbon’s chain.The analysis and the measurement offer high helps in the microwave assistant organic synthesization.展开更多
文摘Functionalized organozinc reagents can easily under 1, 4-addition reaction withunsaturated esters in the presence of catalytic amount of Ni (acac)_2 and tertiary ammes under verymild conditions to give the products in excellent yields.
基金The work was financially supported by the National Natural Science Foundation of China and the New Materials Study Project of Northwest Normal University, China.
文摘The spectrophotometric characteristic of a new reagent 1, 4, 9, 12-tetraaza Cyclo-2, 3, 6, 7, 10, 11, 14, 15 tetrabenzocetanan-5, 8, 13, 16-tetraone (TCTCT) and its complex with Cu(Ⅱ) were studied. The reagent and its complex with Cu(Ⅱ) have a similar maximum absorbance at 446 um. In C6H4(C2O4HK)-NaOH buffer (pH=4.00), the complex of Cu(Ⅱ)-TCTCT formed when it was heated. The absorbance increased with the increase of the concentration of Cu(Ⅱ) in the range of 1 .6x10-7-5.5x 10-5 mol/L. The composition ratio of the complex was formed to be 1: 1 using the molar ratio method. The method was simple, rapid and sensitive, giving an apparent molar absorptivity of 1.25x105 L mol-1 cm-1 and the apparent stability constant of 1 .04x106. The method was directly applied of copper in fresh milk.
文摘The dielectric property of organic reagent is key to the study of Microwave-assisatant organic synthesization.The data of complex permittivity of these organic reagents can not be obtained easy.The complex permittvity of these organic regents were measured in 2.45 GHz by cavity perturbation method.The result shows that the real and imaginary parts of the permittivity of alcohol are larger than others.The real part of the complex permittivity of ketone is larger and the imaginary part is smaller.The real and imaginary parts of the permittivity of acid are smaller.The real and imaginary parts of the permittivity of alkyl and benzene are the smallest.The real part and the imaginary parts of the permittivity of all decrease while the increasing of the number of carbon’s chain.The analysis and the measurement offer high helps in the microwave assistant organic synthesization.
