Formation of Alkenes Flashcards
What is formed when a Hydrogen and a Halogen (or H2O) on adjacent carbons leave?
Alkenes
Is NaOH a catalyst?
No
Briefly, what are substitution reactions?
When two reactions swap parts to give a new product
Is H2SO4 a catalyst?
Yes
What are rearrangement reactions?
Where one reactant rearranged its bond and atoms to give the opposite isomer
What type of reactions to alkyl halides and alcohols undergo to form an alkene?
Elimination reactions
What type of alkyl halides undergo the fastest elimination reactions?
Tertiary halides
Which product will always form preference?
The more stable
What does Zaitsev’s Rule state?
In an elimination reaction, the more highly substituted alkene product predominates
Are cis and trans isomers equally stable?
No
What occurs in elimination reactions?
One reactant splits into two products
What is the formation of the products dependent on in any reaction?
How stable the transition state is (and hence the activation energy)
What are elimination reactions considered to be the opposite of?
Addition reactions
What effect do alkyl substituents bonded to the sp2 carbons of an alkene have?
A stabilising effect
What are addition reactions?
Where two reactants combine to form one new product