(a)[1]
Provide the molecular formula of noradrenaline.
(b)[1]
State whether noradrenaline shows stereoisomerism or not, and explain your response.
(c)
$\text{HNO}_2\text{(aq)}$ is added at $5\,^{\circ}\text{C}$ to separate samples of noradrenaline and phenylamine. With phenylamine, a stable diazonium ion is formed. With noradrenaline, an unstable diazonium ion is formed.
(c(i))[1]
Suggest why the diazonium ion formed from phenylamine is stable.
(c(ii))[2]
If one noradrenaline molecule reacts with one $\text{HNO}_2$ molecule, the products are one water molecule, one molecule of an unreactive gas, and one organic compound containing only carbon, hydrogen and oxygen. Complete the chemical equation for this reaction.