scholarly journals Monosubstituted Benzene Derivatives from Fruits of Ficus hirta and Their Antifungal Activity against Phytopathogen Penicillium italicum

2016 ◽  
Vol 64 (28) ◽  
pp. 5621-5624 ◽  
Author(s):  
Chunpeng Wan ◽  
Jianxin Han ◽  
Chuying Chen ◽  
Liangliang Yao ◽  
Jinyin Chen ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Benzene Derivatives ◽  
Penicillium Italicum ◽  
Monosubstituted Benzene ◽  
Ficus Hirta

Carbon-13 Substituent-Induced Chemical Shifts: Monosubstituted Benzene Derivatives

1992 ◽  
Vol 57 (3) ◽  
pp. 497-507 ◽  
Author(s):  
Otto Exner ◽  
Miloš Buděšínský
Keyword(s):  
Benzene Ring ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
The Other ◽  
Correlation Equations ◽  
Benzene Derivatives ◽  
Complex Mechanism ◽  
Monosubstituted Benzene ◽  
Resonance Effects ◽  
Other Hand

Carbon-13 NMR spectra of twelve monosubstituted benzene derivatives were measured in deuterochloroform. Together with the literature data a set of 35 systematically chosen substituents was obtained on which some thirty correlation equations were tested. As anticipated only substituent chemical shifts (SCS) in the position 4 are controlled by inductive and resonance effects, and can be correlated by dual substituent parameters (DSP). For the other positions DSP were not successful and more sophisticated equations are not much telling. On the other hand, the direct relations between two series of SCS are usually more precise and simple to understand. It is concluded that SCS in benzene ring need not be controlled by too complex mechanism but simply by different factors than by inductive and resonance effects.

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