 በብርሃን ሲነቃ, የቤንችማክሲዮክሲቲ ኮኮፕ ይጠይቃል2 (ሳይክፔንትዲኒኒል, 1,5-cyclooctadiene) እንደ ካስቴሪያ ሆኖ እንዲያገለግል.
Marka firfircooni ku shaqeynayo, Bönnemann cyclization waxay u baahan tahay CoCp2 (Cyclopentadienyl, 1,5-cyclooctadiene) si ay u dhaqmaan sida xayawaan.