a) Write the structural formula of 2-bromo-4-methylpentane. b) Write the equation of reaction of nucleophilic substitution btn 2-bromo-4-methylpentane and aqueous Sodium Hydroxide. c) 2-bromo-4-methylpentane is made to react with Sodium Cyanide to form product A. The resultant organic product A is reacted with H2O in presence of H2O to give product B. Give the IUPAC name for the structural formula of compounds A and B. d) What's meant by the term isoelectric point?

a) The structural formula of 2-bromo-4-methylpentane is: CH_3CH(Br)CH_2CH(CH_3)CH_3 b) The equation for the nucleophilic substitution reaction between 2-bromo-4-methylpentane and aqueous sodium hydroxide is: CH_3CH(Br)CH_2CH(CH_3)CH_3 (aq) + NaOH (aq) CH_3CH(OH)CH_2CH(CH_3)CH_3 (aq) + NaBr (aq) c) Step 1: Reaction of 2-bromo-4-methylpentane with sodium cyanide. The bromine atom is replaced by a cyanide group. The structural formula of product A is: CH_3CH(CN)CH_2CH(CH_3)CH_3 The IUPAC name for compound A is 3-methylbutanenitrile. Step 2: Hydrolysis of product A (nitrile) with H₂O in the presence of H⁺. The nitrile group is hydrolyzed to a carboxylic acid group. The structural formula of product B is: CH_3CH(COOH)CH_2CH(CH_3)CH_3 The IUPAC name for compound B is 3-methylbutanoic acid.