Questions and training MCQ: 1. Which of the following transitions is the highest energy transition? (a) n to (b) n to (c) to (d) to 2. Which of the following alkenes would have the largest max ? 3. Which of the following alkenes would have the largest max ? (a) (b) (c) (d) 4. What is the max for the following compound? Use the provided parameters for your calculation. transoid base value =214nm cisoid base value =253nm alkyl groups on base =+5nm exocyclic C=C=+5nm extended conjugation =+30nm (a) 234nm (b) 244nm (c) 273nm (d) 283nm 5. What is the max for the following compound? Use the above parameters for your calculation. (a) 229nm (b) 249nm (c) 254nm (d) 259nm 6. Compared with a conjugated diene, the UV-visible absorption spectrum of a conjugated triene will change in which way? A) the max will increase and the will decrease B) the max will decrease and the will increase C) both the max and the will decrease D) both the max and the will increase 7. The conjugated diene, 1,3-cyclohexadiene, has four -molecular orbitals. In order of increasing energy these are: 1,2,0 and 2. Which of these is the HOMO of the electronic ground state? A) 1 B) 2 C) 3 D) 4 8. Which of the following trienes will have the longest wavelength absorption in the ultraviolet? A B C D Arrange the following in decreasing of max : 1. Aniline, aniline HCl,p-nitro aniline 2. benzene, toluene, phenol