Question

Splitting Patterns Lastly, let's discuss why some signals are comprised of only a single peak, called a singlet, while other signals exhibit splitting, and may appear as a doublet, triplet, quartet, quintet, sextet, septet, octet, nonet, etc. Splitting is due to neighboring H's. That is, H's that are separated by 3 covalent bonds are called "neighbors". Each neighbor splits a signal, and the pattern observed matches the N+1 rule: the number of peaks observed is one more than the number of neighbors. Thus, neighboring protons are what give rise to splitting patterns Singlet Doublet Quar Triglet Setet Quintet Septet Note: if splitting is detected, but the pattern is not one of these recognizable patterns, we call the signal a multiplet. Multiplets can result from complex splitting and/or overlapping signals. Activity Why are there three H's and only two signals? Label the H's (H, or Hb) according to the assigned peaks. Br Br Br- -H What is the area under the curve for each signal? Does the integration ratio match what you expect it to be? н H. Ha For Ha, how many neighboring H's are on the adjacent carbon atom? Does the splitting pattern of Ha follow the N+1 Rule? For Hb, how many neighboring H's are on the adjacent carbon atom? Does the splitting pattern of Ha follow the N+1 Rule? 6.0 4.5 5.5 5.0 f1 (ppm)

Answer 1

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