A seven-carbon compound which gives three signals in the ¹³C NMR spectrum could be: A) heptane B) 2-methylhexane C) 3,3-dimethylpentane D) 2,4-dimethylpentane E) 2,2,3-trimethylbutane

Question

Quizplus · Accepted Answer

A seven-carbon compound cannot be heptane, 2-methylhexane, or 3,3-dimethylpentane as they have only one unique proton environment and would give only one signal in the NMR spectrum. 2,2,3-trimethylbutane would give four signals in the NMR spectrum due to the presence of four different proton environments (one methyl group on C1, two methyl groups on C2, and one methyl group on C3). Therefore, the best choice is 2,4-dimethylpentane which has two unique proton environments and would give three signals in the NMR spectrum.

A Seven-Carbon Compound Which Gives Three Signals in the 13C

A Seven-Carbon Compound Which Gives Three Signals in the ¹³C