6. Is the thermal (3+2) cycloaddition between allyl anion and ethylene to give the cyclopentyl carbanion,...
6. Is the thermal (3+2) cycloaddition between allyl anion and ethylene to give the cyclopentyl carbanion, shown below, a thermally allowed or forbidden reaction? To answer, draw the molecular orbitals for HOMO of the ally! anion and LUMO of ethylene and clearly orient the orbitals in such a way that the orbital interactions are clear. Label the two key orbital interactions as bonding (in-phase) or antibonding (out of phase). (11 pts) G