 በብርሃን ሲነቃ, የቤንችማክሲዮክሲቲ ኮኮፕ ይጠይቃል2 (ሳይክፔንትዲኒኒል, 1,5-cyclooctadiene) እንደ ካስቴሪያ ሆኖ እንዲያገለግል.
Nigbati a ba ṣiṣẹ nipasẹ ina, wiwọ Bönnemann nilo CoCp2 (cyclopentadienyl, 1,5-cyclooctadiene) lati sise bi ayase.