The proton NMR data for 1-bromopropane is summarized below on the far right. The
ID: 559990 • Letter: T
Question
The proton NMR data for 1-bromopropane is summarized below on the far right. The chemically distinct hydrogens are labeled a, b, c...etc. and listed with their multiplicity and integration Example. 1 peak singlets Ha: t, Int. 2H 2 peaks doublet d 3 peaks riplett H): m, Int. 2H 4 peaks quartet 5 or more multiplet m Ha HH a) Through how many bonds can a hydrogen split another hydrogen'? b) According to this splitting rule, does Ha split He? c) Is your answer in part a) consistent with the multiplicity listed for peak clusters a and c? d) How many hydrogens split H,? e) Upon very close inspection of the proton NMR spectrum of 1- bromopropane, you would find that peak cluster b has 6 peaks. Is this consistent with your answer in part d)? f) Speculate as to why any peak cluster with more than five peaks is listed simply as a "multiplet."Explanation / Answer
1) if we take all bonds between hydrogens there are three bonds separating two hydrogens( hydrogens on neghboring hydrogens split each other)
2) No Ha cannot split Hc as there are five bonds between hydrogens, ( not on neighboring cabons)
3)yes Ha and Hc have triplets due splinting from 2 Hb (n+1)
4) two Ha and three Hc split Hb into multiplet(2+1)(3+1)= split into 12 peaks
5) No, it is not consistent
6) usually in splitting above five, peaks are not clearly separated in nmr Spectra, so it is usually mentioned as multiplet my
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