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A Correlation Analysis Study of Substituent Effects by 13C Nuclear Magnetic Resonance : Effect of Solvent on The Chemical Shift of Cα and C of meta- and para-X-substituted Styrenes. | ||
| basrah journal of science | ||
| Article 1, Volume 33, Issue 1, 2015, Pages 41-58 PDF (0 K) | ||
| Author | ||
| Sabih Abdul-wadood Othman Al-Shawi | ||
| Abstract | ||
| The 13C Substituent Chemical Shifts (SCS) for Cα and C atoms for the meta- and para-X- substituted styrenes (X= H, NMe2, OMe, Me, F, Cl, Br, CF3, CO2Me, COMe, CN, NO2) in seven different solvents (75%EtOH-D2O, EtOH, Me2SO, Me2CO, CDCl3, CCl4 and C6H6), were modelled by two different types of substituent parameter: namely mono substituent parameter (MSP)(Hammett’s model), and dual substituent parameter DSP(modified Swain-Lupton, Reynolds’ and Taft models). There is no significant difference between reaction constants values in the same model, of the same atom in the same series in different solvents. The final conclusion, is that no solvent effect on Cα and C of styrene on using Hammett, modified Swain-Lupton, Reynolds and Taft models. | ||
| Keywords | ||
| Correlation Analysis; C SCS; Solvent effect; Hammett; Modified Swain; Lupton Model; Reynolds model; Taft model; and C; and para; substituted Styrenes; Transmission of substituent Effects | ||
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