Calculate the relative reactivities of each unique type of hydrogen on 2,4-dimet

Question

Calculate the relative reactivities of each unique type of hydrogen on 2,4-dimethylpentane, based on the % areas in your chromatogram.

Latest Time Potential (min 0.0 0.01 0.0 0.82 081 0.03 0.81 0.04 0.05 0.07 0.0 0.86 0.08 0.8 12 0.82 0.10 0.8 0.11 0.836 15 0.12 0.13 0.83 0.1 18 19 0.1 0.82 0.82 0.1 0.82 0.1 0.8 24 0.19 0.8 25 0.2 0.82 26 0.21 0.836 20- 27 0.8 28 0.2 29 0.2 30 0.2 0.8 0.88 0.2 32 0.2 33 0.2 1.3 1.381 Potential Compound Peak 1 0.984 m Peak 2 Peak 3 H CH3 Time (min) Peaks for LatestlPotential Retention Time (min) Area Area 2.967 30.33 4,125 0.54 22.28 4.708 1.15 47.39

Explanation / Answer

Chromatogram analysis of 2,4-dimethylpentane

Total area = 100%

area of 3o = 30.33

area of 2o = 22.28

area of 1o = 47.39

Realative reactivity of each unique type of hydrogen on 2,4-dimethylpentane

Here we have 2 tertiary hydrogen, 2 secondary hydrogen and 12 primary hydrogens

So,

relative reactivity of 3o = 30.33/2 = 15.16

reactive reactivity of 2o = 22.28/2 = 11.14

relative reactivity of 1o = 47.39/12 = 3.95

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