A weak base or solvent abstracts a proton from a carbon adjacent to the carbocation, causing the electrons to collapse and form a pi bond (double bond) . Factors Favoring E1 Reactions
The core of the essay should explain the step-by-step nature of the mechanism: big e1
The leaving group departs, forming a carbocation intermediate . Because this step involves only one molecule, it is "unimolecular". A weak base or solvent abstracts a proton
Highly substituted substrates (tertiary alkyl halides) are preferred because they form the most stable carbocations. big e1
The E1 Reaction and Its Mechanism - Master Organic Chemistry
Polar protic solvents (like water or alcohols) are ideal as they stabilize the ions formed during the reaction.