Question
a) Give the structures and names of all possible isomers of; i. Dimethylbenze ne (xylenes) ii. Aminobenzoic acids b) Analyse cycloheptatriene (explain your answers) i. Is it aromatic ii. Is the conjugate base aromatic iii. Is the cycloheptatrien yI cation aromatic (6 Marks) (6 Marks) (2 Marks) (2 Marks) (2 Marks)
Answer
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Sheldon
Veteran · Tutor for 11 years
Answer
a) i. Dimethylben (xylenes) isomers: - 1,2-Dimethylbenzene (o-xylene) - 1,3-Dimethylbenzene (m-xylene) - 1,4-Dimethylbenzene (p-xylene)ii. Aminobenzoic acids: - 4-Aminobenzoic acid - 3-Aminzoic acid - 2-Aminobenzoic acidb)i. Cycloheptatriene is aromatic because it follows Hückel's rule, which states that a cyclic conjugated planar molecule with (4n + 2) π electrons is aromatic. Cycloheptatriene has 7 π electrons, which satisfies Hückel's rule.ii.ate base of cycloheptatriene is not aromatic because it has lost a proton, resulting in a charge on the molecule. Aromatic molecules are typically neutral and have a planar, cyclic structure.iii. The cycloheptatrienyl cation is aromatic because it still follows Hückel's rule despite having a positive charge. The charge is delocalized throughout the molecule, maintaining its aromatic properties.