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CHE 008B A01 SS1 2025 Lecture 4 - What is Aromaticity?

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Aromatic molecules are more stable than non-conjugated alkenes. Aromatic molecules are more stable than conjugated alkenes. Anti-aromatic molecules are less stable than non-aromatic molecules.

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The question presents three comparative stability statements about aromatic, conjugated, non-conjugated, non-aromatic, and anti-aromatic systems. We will assess each statement in turn. Statement 1: Aromatic molecules are more stable than non-conjugated alkenes. - Reasoning: Aromatic compounds possess a continuous cyclic p-orbital overlap that creates a closed-loop ring of electrons (Hückel's rule: 4n+2 π ......Login to view full explanation

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Open Odyssey, click on the Labs (complete list) button at the top of the screen.  Choose Resonance of Benzene (F24).  Follow all of the directions (including those in the Questions section).  Answer the questions below for Hypothetical Benzene I & II (models from Energy calculations with constrained alternating double and single bonds). The high electron density surface indicates the presence of double bonds. The single bond length is 153 pm (picometers). The double bond length is 133 pm. The energy of the models is negative and greater than 600,000 kJ/mol.   Answer the questions below for Hypothetical Benzene (models from Equilibrium calculation with unconstrained carbon-carbon bonds). The C-C bonds have lengths of 138 pm and bond orders of 1.5 . Compared to Hypothetical Benzene I & II, the energy of this model is more negative indicating it is more stable .

Consider the following heterocycles (I - III)Which adhere to the rules of aromaticity?

Consider the following heterocycles (I - III)Which adhere to the rules of aromaticity?

Consider the following heterocycles (I - III)Which adhere to the rules of aromaticity?

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