State the splitting pattern you would expect for the underlined (and bolded!) element in: CH3CH2COCH3Group of answer choicesA doubletA singletA tripletA quartet
Question
State the splitting pattern you would expect for the underlined (and bolded!) element in: CH3CH2COCH3Group of answer choicesA doubletA singletA tripletA quartet
Solution
The molecule CH3CH2COCH3 is butanone. The underlined and bolded element is the middle carbon atom, which is part of a -CH2- group.
In 1H NMR spectroscopy, the splitting pattern of a signal depends on the number of neighboring protons. The -CH2- group in butanone has three neighboring protons on the adjacent -CH3 group. According to the n+1 rule, where n is the number of neighboring protons, the -CH2- group would be split into n+1 = 3+1 = 4 peaks.
So, the splitting pattern for the underlined and bolded element in CH3CH2COCH3 would be a quartet.
Similar Questions
State the most likely chemical shift region for the underlined (and bolded!) element in: CH3COCH3Group of answer choices
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Look at the picture below. What is the full name of the third element in this group?
a) For the following compound, predict the splitting pattern found for the letters, a, b, c and d.(i) Splitting pattern for a is Answer (1 mark)(ii) Splitting pattern for b is Answer (1 mark)(iii) Splitting pattern for c is Answer (1 mark)(iv) Splitting pattern for d is Answer (1 mark) b) For the compound shown above, molecular ion peak on a mass spectrum would be seen closest to m/z ratio(s) of Answer (1 mark)
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