Alkenes react with concentrated sulphuric acid in the cold to produce alkyl hydrogensulphates. Ethene reacts to give ethyl hydrogensulphate. The structure of the product molecule is sometimes written as CH 3 CH 2 HSO 4, but the version in the equation is better because it shows how all the atoms are linked up.
More complicated alkyl hydrogensulphates react with water in exactly the same way. For example: Notice that the position of the -OH group is determined by where the HSO 4 group was attached. You get propan-2-ol rather than propan-1-ol because of the way the sulphuric acid originally added across the double bond in propene.
It includes the conversion of the product into an alcohol. Alkenes react with concentrated sulphuric acid in the cold to produce alkyl hydrogensulphates. Ethene reacts to give ethyl hydrogensulphate.
When a compound HX is added to an unsymmetrical alkene, the hydrogen becomes attached to the carbon with the most hydrogens attached to it already. In this case, the hydrogen becomes attached to the CH 2 group, because the CH 2 group has more hydrogens than the CH group.
The addition of sulphuric acid to alkenes. The reaction with ethene. Alkenes react with concentrated sulphuric acid in the cold to produce alkyl hydrogensulphates. Ethene reacts to give ethyl hydrogensulphate. The structure of the product molecule is sometimes written as CH3CH2HSO4, but the version in the equation is better because it shows how ...
You could end up with one of two products depending on which carbon atom the hydrogen attaches itself to. However, in practice, there is only one major ...
All you need to do is to learn the structure of sulphuric acid . A hydrogen from the sulphuric acid joins on to one of the carbon atoms, and the rest joins on to the other one. Make sure that you can see how the structure of the sulphuric acid relates to the various ways of writing the formula for the product. Important!
These days, alcohols like ethanol or propan-2-ol tend to be manufactured by direct hydration of the alkene because it is cheaper and easier.
You get propan-2-ol rather than propan-1-ol because of the way the sulphuric acid originally added across the double bond in propene. Using these reactions.