1. a. 4 marks Draw the structure of each of the following alkenes. 2-Bromopent-l-ene (3E)4-Fluorohept-3-ene (1) Give the correct name for structures (1) and (2). (4 marks] (1) (2) b. The electrophilic addition of HBr to the alkene (3) gives rise to a beamoalkane product as shown in Figure 1. Draw the structure of the bromoalkane product. Draw the structure of the intermediate species leading to this product Identify which step of the reaction is the fast step and which is the siow step Using the curly arrow notation draw a mechanism for this reaction Step 1 Intermediate Species -Bromoka Step 2 - H-B [6 marks) 16 marks co Figure 1 Draw all the stereoisomers for each of the following compounds. 2-Methylbutan-1-o! Butane-2 3-diol Designate the configuration of the stereogenic centre in the following structure according to the RS system and justify your answer 13 marker) Ph Me Bi () Identify whether the compounds in Figure 2 are chiral or achiral. Justify your answer in each case [4 marks OH SH HO Figure 2