Preparation of alkyl halides (PCl5), dehydrohalogenation, and peroxide (anti-Markovnikov) addition of HBr

2026 1 question

1. In the following reaction sequence, X and Z, respectively are: $CH_3CH_2CH_2-OH + PCl_5 \rightarrow CH_3CH_2CH_2Cl + X + HCl$, then $CH_3CH_2CH_2Cl \xrightarrow[\Delta]{Alc.\ KOH} Y \xrightarrow[(C_6H_5CO)_2O_2]{HBr} Z$