How many additional resonance forms can be drawn for phenanthrene shown below?

Curved arrows are used to illustrate the flow of electrons. Using the provided resonance structures, draw the curved electron-pushing arrows to show the interconversion between resonance hybrid contributors. Be sure to account for all bond-breaking and bond-making steps.

4. Explain why the following molecule is considered aromatic. (it may help to draw a resonance form) O:

Draw three major resonance contributors for the molecule shown in the box. Partiallycompleted skeletal structures are provided as a time-saver; simply add double bonds and formalcharges where appropriate. Do not generate any additional charges.

Select all that is true for cycloheptatriene and the ions it can form. The 6 pi electrons in cycloheptatriene anion can be delocalized over the ring, which decreases the electronic energy of the molecule. Delocalization of the pi electrons in cycloheptatriene anion increases the electronic energy of the molecule. The cycloheptatriene contains 6 pi electrons, which makes it an aromatic compound. The pi electrons in cycloheptatriene cannot be delocalized over the ring. The pi electrons in cycloheptatriene cation can be delocalized over the ring. The 6 pi electrons in cycloheptatriene cation can be delocalized over the ring, which decreases the electronic energy of the molecule. The cycloheptatriene anion contains 6 pi electrons, which makes it an aromatic compound.

Question 2. Draw the molecular orbital diagrams for thioazepine. Indicate if this compound is aromatic, non-aromatic or anti-aromatic using this energy diagram. Justify your answer. N S

A cationic intermediate for the electrophilic addition of chlorine to the para position of phenol is shown. Draw the resonance structure that is the major contributor. Include all nonbonding electrons. I + -Ö :CI: Select Draw / ||| ||| Templates C More H HOCI Erase Q2Q

Classify the following resonance structures (a) - (c) as MOST, MAJOR and MINOR Contributor.

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