WHAT IS OLEFIN?

Olefins are chemical compounds that contain at least one double bond.

Alkenes or olefins belong to a type of unsaturated hydrocarbons that could be defined as alkanes have lost a pair of hydrogen atoms. Instead of these hydrogen atoms, olefins produced a double bond between two carbons.

Features of olefins
The main features of the olefins are:

- Higher density than water
- Insoluble in water
- They are colorless
- Present a carbon - Carbon
- Your isomerism is chain paraffins as
- They are classified as unsaturated hydrocarbons
- The geometrical isomerism is cis or - trans
- The cis isomer is usually more polar, have a higher boiling point and lower melting point than the trans isómetro

Physical properties of the olefins 
Olefins are very similar to physical properties of alkanes. However, the double bond carbon - carbon evidence enespecial variations in two characteristics: acidity and polarity.

Acidity of olefins
The polarity of the carbon-carbon double bond of the olefins causes them more acidic than alkanes. However, the acidity of the olefins is less than the carboxylic acids and the alcohols.

Olefins polarity
Olefins polarity depends entirely on their stereochemistry. Introducing a double bond, olefins or alkenes having a first cis molecule. The cis molecules are distinguished in that the substituents are on one side of the double bond. When the olefins have a cis molecule, a net dipole moment arises. In the case of olefins with trans molecules (which are found on opposite sides of the double bond), the dipole moment is zero.