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Solved: Determine the ratios of the chemically
Chapter 15, Problem 50P(choose chapter or problem)
Problem 50P
Determine the ratios of the chemically nonequivalent protons in a compound if the steps of the integration curves measure 40.5, 27, 13, and 118 mm, from left to right across the spectrum. Draw the structure of a compound whose 1H NMR spectrum would show these integrals in the observed order.
Questions & Answers
QUESTION:
Problem 50P
Determine the ratios of the chemically nonequivalent protons in a compound if the steps of the integration curves measure 40.5, 27, 13, and 118 mm, from left to right across the spectrum. Draw the structure of a compound whose 1H NMR spectrum would show these integrals in the observed order.
ANSWER:
Solution 50P
To determine the ratios of the chemically nonequivalent protons, divide the value of the integration steps by the smallest one (13):
Therefore, the ratios of the hydrogens are 9: 1: 2: 3