Which of the following resonating structures of 1-methoxy-1, 3-butadiene is least stable…
Chemistry · JEE Advanced · NTA Exams — Basic Principles of Organic Chemistry
Which of the following resonating structures of 1-methoxy-1, 3-butadiene is least stable ? (2005)
- \(\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_{2}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\stackrel{\oplus}{\mathrm{O}}-\mathrm{CH}_{3}\)
- \(\mathrm{CH}_{2}=\mathrm{CH}-\stackrel{\ominus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}=\stackrel{\oplus}{\mathrm{O}}-\mathrm{CH}_{3}\)
- \(\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_{2}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}=\mathrm{CH}-\mathrm{O}-\mathrm{CH}_{3}\)
- \(\mathrm{CH}_{2}=\mathrm{CH}-\stackrel{\ominus}{\mathrm{C}} \mathrm{H}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{O}-\mathrm{CH}_{3}\)
Answer
(C) C H _ 2 - C H - CH = CH - O - CH _ 3
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