Hydride Donating Ability We know that some compounds can donate $\ce{H-}$ anion to attain stability. What are the conditions under which it occurs and what should be the extent of stability of the product for this pathway to be viable?
Many compounds are good hydride donors, if it results in carbonyl bond formation or extended conjugation. Sometimes, a compound can donate H- ion if it results in stable pi bond formation.
(e.g. Tertiary butyl carbanion)