The double bond in
alkene is electron rich and enable to react with any electrophile
such as H+. Two carbons that have the double bond will be open up.
The rule to which carbon make a bond depending on
Markovnikov's rule.
Markovnikov's rule. -
Hydrogen bonds to the most hydrogenated carbon.
From this chapter on, many reactions will be
discuss and the best starting point is from the summary to
memorize.
Oxidative Cleavage: 2
examples with
/ warm condition
Step 1 using your thumb to
cover the right end of alkene see thumb as an oxygen and draw the
first product.
Step 2: cover the left end of
double bond with thumb and again see the thumb as an oxygen and draw
the product
Step 3:: If there is aldehyde,
convert it to carboxylic acid.
(Syn addition) 
