Question

Nah Nat R THF, 1 hr fulvene a. The reaction described involves the nucleophilic addition of hydride (H) to fulvene, which forms a fulvene anion R-("sodium fulvene" refers to the sodium cation with a fulvene anion). What is the structure of this anion? b. Explain why this particular anion forms in preference to other isomers derived from hydride addition to different carbons.

Answer 1

Answer NOH • THE 1hr Natro Fulvene a) Answer NGH THF N Mechanism Ngo Na how Not Loomed b) Explanatica The nucleophilic addition of hydride ipe to Fulvene gives two isomeric fulvene anion. 1 Nah, Te Nat lenat unstable 671€ Uroma hc Formed more stable a B The Gnian Abormed because it is 611 e system and according to Huckel rule, it is Aromal in nature. There Isore clue to aromabic charcter of anion A it is highly stable of it easily formed in Prekerence to other isomer B. The anion B is not aromatic and it it highly unstable Therefore Goicom A is more stable god it koam in Preference to animib.