| For example, the addition of cyclopentadiene to 1,4-benzoquinone follows second-order kinetics and proceeds at nearly the same rate in the gas phase and in solvents of widely differing polar character. |
| Sulfurized olefins are used in extreme pressure lubrication, while a highly resistant sulfur cement and concrete can be prepared from cyclopentadiene Diels-Alder oligomers linked by polysulfide chains. |
| Sodium methylate and then cyclopentadiene are added, and ferrocene ultimately precipitates out of the solution. |
