Both cyclopentadiene and cyclopentadienyl nion have same valenceelectrons and same 5-membered Carbon ring structure. However,cyclopentadiene adopts \"envelope\" shape with C on right tilted outof the plane of 4 Carbon atoms. The anion adopts flat structure.Further, the anion is far more stable chemically thancyclopentadiene. Speculate why this is so. Answer should considerboth hybridization and resonance.
