Alkene. There are two ways to prepare alkene, either from alcohol or haloalkane via elimination reaction. This reaction must follow Saytzeff's rule (what it is about?) To understand the elimination reaction, please watch the following video, regrading to dehydration of alcohol to produce alkene. Please consider rearrangement of carbocation in elimination reaction.
Alkene is a reactive hydrocarbon (why), it can carry out various electrophilic addition. This reaction follow Marconikov's (what it is about?)
Mechanism hydration of alkene
Mechanism hydrohalogenation of alkene
Okey..thats all...see you again in next chapter