Question

Label each of the following as aromatic, anti-aromatic, or non-aromatic. (1 point each) aromatic? antiaromatic? nonaromatic? aromatic? antiaromatic? nonaromatic? 1) 3) 2) O: Predict whether each of these reactions works with heat or light. (2 points each) heat? light? 5) heat? light? 6) Predict the major organic product or products. (2 points) CH3 Cl 7) FeCl

please help me with #1-7 I do not understand it. Please be clear if you are writing the answer out so I am able to read it.

Answer 1

For a molecule to be aromatic , they need to fulfill some criterion

1. Cyclic

2. Conjugated pi electrons

3. Planar

4. Must have (4n+2)pi electrons

5. This reaction is an example of diels elder reaction which takes place in presence of heat

Therefore, Heat will be the answer.

6. This is simply a reaction going via homolytic radical formation which usually takes place in presence of light.

Yherefore, light will be the answer.बीं

Similar is the case for anti aromatic but with one difference that , inspite of having (4n+2)pi electrons they have 4n pi electrons

Now, lets solve the problem

1. Since the molecule is not planar due to presence of one sp3  carbon while all others are sp² . Also, the conjugation of pi electrons is not complete therefore, it is non aromatic.

2. It is non aromatic since the molecule us not planar.

3.It is anti aromatic since, it is planar , conjugated pi electron system, cyclic and has 4n pi electrons i.e., 4 electrons and if you put n=1 we can found the molecule obeying anti aromatic requirement.

4. It is aromatic since it is planar ,cyclic, conjugated, have (4n+2)pi electrons

5. This reaction is an example of diel alder reaction which takes place in presence of heat. Therefore this reaction will proceed via heat.

6. It proceed in presence of light as this reaction consists of intramolecular homolytic radical formation which usually takes place in presence of light.

7.

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