In the much-maligned Cieplak model for addition to carbonyl groups, this phenomenon is responsible for stabilizing the transition state, and this effect is responsible for beta-silicon-enhanced ionization.
In the much-maligned Cieplak model for addition to carbonyl groups, this phenomenon is responsible for stabilizing the transition state, and this effect is responsible for beta-silicon-enhanced ionization. A common demonstration of this effect is the increasing stretching frequency of the C-O double bond in cyclopropanone versus cyclopentanone. Heteroatoms prefer the axial orientation in cyclohexane systems due to the anomeric effect, which is sometimes called "negative" this. This effect is responsible for forcing ethane into a (*) staggered conformation. This effect is the reason why the C-C single bond in 1,3-butadiene is shorter than the bonds in butane and and why tertiary carbocations are more stable than primary ones. For 10 points, name this effect in which sigma donate electron density to neighboring empty p-orbitals.
In the much-maligned Cieplak model for addition to carbonyl groups, this phenomenon is responsible for stabilizing the transition state, and this effect is responsible for beta-silicon-enhanced ionization.
hyperconjugation [accept anomeric effect before mention, prompt on "conjugation"]