Question 6 Are either of the two ions shown below aromatic? Clearly state whether each ion is aromatic or not and give reasons for your answer in each case. + [5]
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- 3) In the mid-1930s, the German theoretical chemist Erich Hückel developed a rule that dealt with the aromaticity of various compounds, which became known as the Hückel Rule. Which (parts) of the compounds listed below are aromatic? Justify your answer based on Hückel's rule. You can treat the rings separately or together as you wish.State which of the following compounds is/are aromatic and non-aromatic? Classify the compounds based on Hückel's Rule by providing their n values. II II IVCompounds P and Q can undergo a Diels-Alder reaction to form two regioisomeric products R and S as shown in Figure 5. OMe P H C8H1202 R C8H1202 S Figure 5 Draw the chemical structures of regioisomeric compounds R and S. (ii) Using possible resonance contributors of P and Q predict which of the two regioisomers will be favoured in the reaction. (iii) Using curly arrows, draw the mechanism for the reaction of P and Q to form the dominant regioisomer you have predicted in your answer to part (ii) above.
- This structure is considered to have 'anti-aromatic character. 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. Drawing Arrowes :0:This structure is considered to have 'aromatic character'. 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. 1 :0: O: Select to Add Arrows - 0:04. Make a prediction as to the relative stability of the illustrated compounds. Would you expect either of them have any significant aromatic character? Use resonance structures to provide a simple explanation for your answer. NMe₂
- 3) In the mid-1930s, the German theoretical chemist Erich Hückel developed a rule that dealt with the aromaticity of various compounds, which became known as the Hückel Rule. Which (parts) of the compounds listed below are aromatic? Justify your answer based on Hückel's rule. You can treat the rings separately or together as you wish. IMAGE IV: colchicine: a highly poisonous alkaloid, obtained from autumn turmeric and used to treat gout.2. The molecular structure of perylene (see below) contains 20 m-electrons, which is not a Hückel number. Nonetheless, this compound is aromatic. Explain. 88 perylene3) In the mid-1930s, the German theoretical chemist Erich Hückel developed a rule that dealt with the aromaticity of various compounds, which became known as the Hückel Rule. Which (parts) of the compounds listed below are aromatic? Justify your answer based on Hückel's rule. You can treat the rings separately or together as you wish.image iv: colchicine: a highly poisonous alkaloid,obtained from autumn turmeric and used to treat gout.
- According to Huckel's rule, what is the value of "n" for the aromatic compound shown here? 1 o 2 3 O 4 O 5Using the concept of aromaticity and resonance, determine which of the following compounds has the greatest dipole moment. Explain your selectionThe compound below is aromatic even though it has 16 pi electrons. Explain