Propene, cis-pent-2-ene and trans-pent-2-ene are alkenes.

a. For each one give:

i. Its molecular formula

ii. Its structural formula

iii. Its displayed formula

iv. Its skeletal formula.

b. Give the general formula that is used to represent alkenes.

c. Two of these alkenes are isomers of each other. Identify which two.

d. Why is it not possible to change one of these two isomers into the other at room temperature?

e. Give displayed formulae and the names of the four alkenes with molecular formula C₄H₈.

f. 3-Methylpent-2-ene has two cis–trans isomers. Draw and name the two isomers.