IC3 - 1.29.09 - 3. Does it obey rule 3? 4. How many...

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1. Determine if the following compounds obey Huckel’s Rules, and identify them as either aromatic, anti-aromatic or non-aromatic. (Hint: the checklist is there to help you save time; if you answer “no” to any of questions 1 - 4, you can skip directly to 5.) Huckel’s rules are listed at the end of this worksheet. a. 1. Does it obey rule 1? 2. Does it obey rule 2? 3. Does it obey rule 3? 4. How many electrons are in the system? 5. Is it aromatic, non-aromatic or anti-aromatic? b. 1. Does it obey rule 1? 2. Does it obey rule 2? 3. Does it obey rule 3? 4. How many electrons are in the system? 5. Is it aromatic, non-aromatic or anti-aromatic? c. 1. Does it obey rule 1? 2. Does it obey rule 2? 3. Does it obey rule 3? 4. How many electrons are in the system? 5. Is it aromatic, non-aromatic or anti-aromatic? C HEM 112B S CHOLARS I N -C LASS P ROBLEMS 3 1-29-09
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1. cont’d d. 1. Does it obey rule 1? 2. Does it obey rule 2?
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Unformatted text preview: 3. Does it obey rule 3? 4. How many electrons are in the system? 5. Is it aromatic, non-aromatic or anti-aromatic? e. (thiophene) 1. Does it obey rule 1? 2. Does it obey rule 2? 3. Does it obey rule 3? 4. How many electrons are in the system? 5. Is it aromatic, non-aromatic or anti-aromatic? f. (anthracene) 1. Does it obey rule 1? 2. Does it obey rule 2? 3. Does it obey rule 3? 4. How many electrons are in the system? 5. Is it aromatic, non-aromatic or anti-aromatic? g. 1. Does it obey rule 1? 2. Does it obey rule 2? 3. Does it obey rule 3? 4. How many electrons are in the system? 5. Is it aromatic, non-aromatic or anti-aromatic? Huckels rules: 1. the compound needs to have a cyclic array of p-orbitals 2. the array needs to be unbroken no sp 3 centers 3. the array needs to be planar 4. the number of electrons involved in the pi system is 4n + 2 (i.e. 2, 6, 10, etc.)...
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IC3 - 1.29.09 - 3. Does it obey rule 3? 4. How many...

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