Assume the molecule below is planar. Based on that information, how would you classify this compound? NH (A) Aromatic (B) Anti-Aromatic (C) Non-Aromatic
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- Which statement concerning the substances below is correct? A) Compound I is non-aromatic. B) Compounds II and IV are aromatic. C) Compounds I and Ill are anti-aromatic. D) Compound II is anti-aromatic.Categorize the following molecules as aromatic, anti-aromatic, or non-aromatic by adding the assigned letters to the corresponding category. Assume each molecule is planar.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 IV
- Which one of the following statements from Chapter 8 and 18 is FALSE? O For a compound to be classified as aromatic, it must have an odd number of pairs of n-electrons and must be fully conjugated, cyclic and planar. O Inclusion of heteroatoms as part of the conjugated ring system renders the molecule to be considered non-aromatic. O Benzene is a six-membered ring where the n-electrons are equally shared across all six carbons in the ring and thus it possesses 36 kcal/mol of resonance stabilization energy. O The key reaction in Chapter 18 is the EAS reaction, which stands for electrophilic aromatic substitution. O All EAS reactions follow the same three mechanistic steps: (1) generate the electrophile, (2) capture the electrophile to give a carbocation intermediate, and (3) loss of a proton to regain aromaticity.Which of these images are not aromatic?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.
- S Coronene is a polycyclic aromatic hydrocarbon. (a) How many total T electrons does it have? (b) Is that number consistent with the fact that the compound is aromatic? Explain. CoroneneName these molecules and determine if they are aromatic according to Huckel's Rule X (a) (b) Aromatic? Aromatic? (c) (d) Aromatic? Aromatic?Which molecule is expected to show aromatic behavior (the true geometries are flexible)? (a) (b) (c) (d)
- Pyrene has been determined experimentally to be aromatic. At first glance, however, its structure appears to break Hückel’s rule. How so? Can you explain why pyrene exhibits aromaticity?Hint: What are the characteristics of the π system on the periphery of the molecule?Predict the product of the following reaction: 1) H2O 2) NaH Br NO2 3) reflux ZON НО NO2 `NO2 Br ZONWhich one of the following statements from Chapter 8 and 18 is FALSE? O For a compound to be classified as aromatic, it must have an odd number of pairs of r-electrons and must be fully conjugated, cyclic and planar. O Inclusion of heteroatoms as part of the conjugated ring system renders the molecule to be considered non-aromatic. O Benzene is a six-membered ring where the r-electrons are equally shared across all six carbons in the ring and thus it possesses 36 kcal/mol of resonance stabilization energy. O All EAS reactions follow the same three mechanistic steps: (1) generate the electrophile, (2) capture the electrophile to give a carbocation intermediate, and (3) loss of a proton to regain aromaticity.
