Answer to Question #182737 in Organic Chemistry for Uboho Akpan

Question

Give reasons why the compound 3-bromo-3ethyl heptane gives no reaction with potassium hydroxide but bromo-propane does?

A 3.1 sample of an unknown organic gas molecules composed of carbon, hydrogen and oxygen undergoes complete combustion to produce 4.4g CO2 and 2.7g H20. Calculate the empirical and molecular formular of the gas molecule if the molar mass is 62g/mol

Nitrogen in organic compound is tested by the addition of few drops of saturated iron (III) sulphate solution to a small portion of sodium fusion filtrate. Dilute hydrogen tetraoxosulphate(Vl) is then added to the later solution leading to the formation of a Prussian blue colour or ppt. signaling the presence of nitrogen. Show these steps using equations and nameyour final product

Answer 1

The lone pair on O in OH attracts the hydrogen on the beta carbon( the carbon next to the carbon which has the bromide group) and the potasssium cation attracts the bromide group.

A prussian blue colouration indicates the presence of nitrogen in the compound. If nitrogen is present in the compound, the sodium extract would contain sodium cyanide formed during fusion. On adding the required reagents, sodium cyanide reacts to form ferric-ferrocyanide which has prussian blue colour.