 በብርሃን ሲነቃ, የቤንችማክሲዮክሲቲ ኮኮፕ ይጠይቃል2 (ሳይክፔንትዲኒኒል, 1,5-cyclooctadiene) እንደ ካስቴሪያ ሆኖ እንዲያገለግል.
Xa isebenze ngokukhanya, i-Bönnemann cyclization idinga iCocp2 (i-cyclopentadienyl, i-1,5-cyclooctadiene) ukuba ibe yinto ehamba phambili.