Question

Please answer Questions 8,9, & 10 and explain why please. Thanks!

8. Which compound is the reactant for this reaction? OH ? 1. NaOH (excess), 70°C 2. H30* NO2 H NO2 NO2 B. NO2 NO2 D Br NO2 E. A. C. 9. Which statement best describes the aromaticity and UV-vis spectra of these two substances? II A. Both are aromatic. The longest wavelength of absorbance of I is larger than that of II. B. Both are aromatic. The longest wavelength of absorbance of II is larger than that of I. C. I is aromatic while I is antiaromatic. The longest wavelength of absorbance of I is larger than that of II. D. I is aromatic while I is antiaromatic. The longest wavelength of absorbance of II is larger than that of I. E. Both are aromatic and have no absorbance in the UV-vis region. 10. Based upon a 'H NMR spectrum, a student deduces that Compound X is comprised of a benzene ring with only one substituent on it. Compound X undergoes electrophilic aromatic substitution at a rate much faster than ethylbenzene under the same conditions. Which is the most likely substituent on Compound X? A. -CH3 B. -NO2 C. -Br D. -OMe E. -CF3

Answer 1

Incorrect, because in this case 8). Guivom! ? ), MOH (ences), 7oC H300 2) Br OH NO2 LA) NaOH (encers), 70'S Hool NO2 NO2 Cesurecto because weyl buclealbhilic substitution reaction can only accur 'hehen Strong -M group (No here) attached at ortho or para position of the compound and heat is required for this reaction B) Incorrect, because -CHz is not a fearing group to substitute by one in the reaction e) Incorrect, since CHO group is also not a substitution group. D). Incorrect, 'atem on the sing cam not be substituted under these Conditions. No ott will form, which is not the required product