\(\mathrm{PhCHOHCH}_{3}+4 \mathrm{I}_{2}+6 \mathrm{NaOH} \stackrel{\Delta}{\longrightarrow} \)\(\mathrm{CHI}_{3}+\mathrm{PhCOONa}+5 \mathrm{NaI}+5 \mathrm{H}_{2} \mathrm{O}\)