Create
Learn
Share

More Alkenes

rename
krabi's version from 2015-06-11 02:20

Section

Question Answer
What are the thermodynamics of alkenes?THe alkenes the most thermodynamically stable; they have the lowest activation energy.
What is hydration of an alkene? When water is added to alkene (in presence of acid). Follow Markovnikov’s Rule. Is reverse of dehydration alcohol. Watered down wine ...
What drives the alkene hydration?Low temperatures and concentrated acid. (Alkenes like cold icewine).
What inhibits the alkene hydration?(follow up unclear in EK). HIgh temperatures and diluted acid.
memorize

Section

Question Answer
What inhibits the alkene hydration?(follow up unclear in EK). HIgh temperatures and diluted acid.
What is Oxymercuration?Follow’s Mark’s rule: in organometallic compounds the metal like mercury, loses electrons & likes to take on partical positive charge. Like the Terminator. Water based.
What if alcohol is used in Oxymercuration?If not water, just booze is used ⇒ coressponding ether is produced.
What is HydroBoration?Another way to produce alcohol from an alkene. Is Anti-Mark & syn addition. Uses peroxide - help NB Anti-Mark.
Compare halogen reactivity with hydrocarbons.Halogens like alkenes more than alkanes. Alkenes need light to react, alkanes not. Alkynes act just like alkenes when exposed to hydrocarbons.
What happens during a halogenation of an alkene w/water?With water, a halohydrin is formed, Markovnikov’s yes. Electro(+) adds to LEAST substituted Carbon. Water acts as Nuc-.
How do Benzenes react?Always substitution NEVER addition. (Be: if func.gp was added, resonance disrupted,
memorize

Section

Question Answer
What a characteristics of benzenes?Flat molecule on same place, stabalized via resonance and carbon bonds have partial double bond character.
What are STRONG electron donating groups?O -, OH, NRR amine
WHat are moderate EDGs?OR
What is weak EDG?-R
What are strong Electron Withdrawing Groups?NO, N-R-R-R, C-R-R-R
What are moderate EWG?COR, COH, COOR, CN, SOOOH (all with partial pos and neg charges)
What does an EWG do?Deactivates the benzene ring and DIRECTS any new substitutents to the meta position
What does an EDG do?It ACTIVATES the ring and directs any new substituents to ORTHO and PARA positions
What is the exception for EWG and EDG?Halogens! They are EWG and Deactivate the rings; but ortho-para directors.
Is H EDG or EWG?Neither, is neutral.
Is BENZENE: EDG or EWG?For test, consider as ring activator and ortho-para director. Consider as EWG.
memorize