b. Propose an electron pushing mechanism for the cyclization of the amide intermediate to benzimidazole. Indicate all resonance stabilized carbocations with the letters RSCC.

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Chapter1: Chemical Foundations
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a. Propose an electron pushing mechanism for the conversion of o-phenylene diamine plus formic
acid to the first amide intermediate (catalyzed by acid). Indicate all resonance stabilized
"carbocations with the letters "RSCC"
b. Propose an electron pushing mechanism for the cyclization of the amide intermediate to
benzimidazole. Indicate all resonance stabilized carbocations with the letters RSCC.
c. Determine the mmol of both starting materials (factoring in that formic acid is not pure, but rather
88% weight/volume, or 88g/100 ml), showing your work. Determine the limiting reagent in this
synthesis. Lastly, calculate the theoretical yield of benzimidazole that you could expect to form.
Transcribed Image Text:a. Propose an electron pushing mechanism for the conversion of o-phenylene diamine plus formic acid to the first amide intermediate (catalyzed by acid). Indicate all resonance stabilized "carbocations with the letters "RSCC" b. Propose an electron pushing mechanism for the cyclization of the amide intermediate to benzimidazole. Indicate all resonance stabilized carbocations with the letters RSCC. c. Determine the mmol of both starting materials (factoring in that formic acid is not pure, but rather 88% weight/volume, or 88g/100 ml), showing your work. Determine the limiting reagent in this synthesis. Lastly, calculate the theoretical yield of benzimidazole that you could expect to form.
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