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
For predicting the molar diamagnetic susceptibilities of organic compounds,a variable molecular connectivity index mχ′ and its converse index mχ″ based on adjacency matrix of molecular graphs and the variable atom...For predicting the molar diamagnetic susceptibilities of organic compounds,a variable molecular connectivity index mχ′ and its converse index mχ″ based on adjacency matrix of molecular graphs and the variable atomic valence connectivity index δ′i were proposed.The optimal values of parameters a,b,and y included in definition of δ′i,mχ′ and mχ″ can be found by optimization method.When a=1.10,b=2.8,and y=0.36,a good five-parameter model can be constructed from mχ′ and mχ″ by using the best subsets regression analysis method for the molar diamagnetic susceptibilities of organic compounds.The results showed that the current method is more effective than literature methods for estimating the molar diamagnetic susceptibility of an organic compound.展开更多
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.
文摘For predicting the molar diamagnetic susceptibilities of organic compounds,a variable molecular connectivity index mχ′ and its converse index mχ″ based on adjacency matrix of molecular graphs and the variable atomic valence connectivity index δ′i were proposed.The optimal values of parameters a,b,and y included in definition of δ′i,mχ′ and mχ″ can be found by optimization method.When a=1.10,b=2.8,and y=0.36,a good five-parameter model can be constructed from mχ′ and mχ″ by using the best subsets regression analysis method for the molar diamagnetic susceptibilities of organic compounds.The results showed that the current method is more effective than literature methods for estimating the molar diamagnetic susceptibility of an organic compound.
