Cyclopropanation using an iron‐containing methylene transfer reagent: 1,1‐diphenylcyclopropane
reactant: cyclopentadienyliron dicarbonyl dimer [C
5
H
5
(CO)
2
Fe]
2
, (0.50 mol equiv, 0.21 mol, 74.4 g; and )
intermediate: (η5‐C
5
H
5
)(CO)
2
FeCH
2
S+(CH
3
)
2
BF
4
−
product: 1,1‐diphenylcyclopropane
solvent: nitromethane