Problem

This is a detective problem where you work backward from the clues about compound $Q$ to identify the entire reaction sequence. The key insight is that $Q$ must satisfy all four properties simultaneously—especially that it's planar, nonpolar, electron-deficient, and still basic enough to accept hydride from $\text{LiAlH}_4$. Once you identify $Q$, the other compounds fall into place by tracking what happens when you add water, reduce with hydride, or react with strong bases. Think about which common compounds fit a planar trigonal structure with zero dipole moment.

This is a detective problem where you work backward from the clues about compound $Q$ to identify the entire reaction sequence. The key insight is that $Q$ must satisfy all four properties simultaneously—especially that it's planar, nonpolar, electron-deficient, and still basic enough to accept hydride from $\text{LiAlH}_4$. Once you identify $Q$, the other compounds fall into place by tracking what happens when you add water, reduce with hydride, or react with strong bases. Think about which common compounds fit a planar trigonal structure with zero dipole moment.