3. Fill in the gaps indicated by the question mark (?). chromic acid or H3C OH ? (a) potassium permanganate/H+ ? heat and acid catalyst H3C (b) ? CH2 CH3 Cl H3C ? CH3 + ? (c) ? 4. (a) (b) Write down the general reaction for the formation of an ester. Show how the same reaction type can be used to make a polyester. 5. Why can the saturated alkyl group be largely ignored when functional groups are reacting? 6. The reaction of 2-methylpropene with HBr occurs through a polar reaction. What product would you expect? What is the structure of the carbocation formed during the reaction? Draw the structure and give the reaction. 7. State whether each reaction is an addition, elimination, or substitution, and name the compounds: a) CH3CH2CH2Br ? CH3CH=CH2 + HBr b) CH3COBr + CH3CH2OH ? CH3COOCH2CH3 + HBr tone and 3-hexene.

Text: Question 3 Consider the sequence of reactions below: Reaction CH3CH2CHO â†’ HCN Reaction 2: CN â†’ CH3CH2COOH OH â†’ R Name and outline a mechanism for Reaction 1. Name of mechanism (marks) Name compound Q (mark) The molecular formula of Q is C4H10NO. Draw the structure of the isomer of Q which shows geometrical isomerism and is formed by the reaction of ammonia with an acyl chloride (marks). Draw the structure of the main organic product formed in each case when R reacts separately with the following substances: methanol in the presence of a few drops of concentrated sulfuric acid; acidified potassium dichromate (VI); concentrated sulfuric acid in an elimination reaction (marks). (d) Compare the boiling point of the given compounds below. Explain your answer.

Jital V.