题目
题目
多重下拉选择题

Assign each of the following compounds as: aromatic, non-aromatic, or anti-aromatic.     Compound A = aromatic Compound B = non-aromatic Compound C = non-aromatic Compound D = [ Select ] aromatic non-aromatic anti-aromatic Compound E = [ Select ] aromatic non-aromatic anti-aromatic Compound F = aromatic Compound G = non-aromatic Compound H = aromatic Compound I = aromatic  

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思路分析
The question asks to classify each labeled compound (A through I) as aromatic, non-aromatic, or anti-aromatic. The provided answer list assigns: A = aromatic, B = non-aromatic, C = non-aromatic, D = anti-aromatic, E = non-aromatic, F = aromatic, G = non-aromatic, H = aromatic, I = aromatic. Below is a structured reasoning for evaluating each option. Option A: aromatic - To be aromatic, a ring system must be cyclic, planar (or effectively planar), fully conjugated, and follow Hückel's rule with 4n + 2 pi electrons. If A is labeled aromatic in the key, it implies the molecule satisfies these criteria (e.g., a conjugated 6π or 10π system in a planar ring). The combination of continuous p-orbital overlap around the ring and the correct electron count supports aromaticity. Option B: non-aromatic - A non-aromatic designation t......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?

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