Explain why $\text{CDCl}_3$ is preferred as a solvent instead of $\text{CHCl}_3$.
Explain why TMS is added so that the small peak appears at chemical shift $\delta = 0$.
Compound $E$ undergoes hydrolysis in hot $\text{NaOH(aq)}$, producing only two organic products. One product is ethanol. Name the functional group in compound $E$ that is hydrolysed by hot $\text{NaOH(aq)}$.
Describe and explain the splitting patterns for the peaks at $\delta = 1.4$ and $\delta = 4.3$. splitting pattern observed at $\delta = 1.4$ reason for the splitting pattern at $\delta = 1.4$ splitting pattern observed at $\delta = 4.3$ reason for the splitting pattern at $\delta = 4.3$
In each molecule of compound $E$, five protons give the peaks between $\delta = 7.0$ and $\delta = 8.5$. Identify the functional group in compound $E$ that contains these protons.
Give the structural formula for compound $E$.
The mass spectrum of compound $E$ contains fragment ions with $m/e$ values of $29$ and $77$. Give the formulae of these fragment ions. fragment ion with $m/e = 29$ fragment ion with $m/e = 77$