# How many C-C bonds are there in Hexene? What is the structural formula for Hexene?

May 14, 2015

"Hex" is the prefix for 6 carbon atoms and "ene" is the suffix for an alkene.

So there are 4 C-C bonds and 1 C=C bond

May 15, 2015

The suffix -ene means that a hydrocarbon molecule has at least one pair of double-bonded carbon atoms, $\text{-C=C-}$, and is called an alkene. The Greek prefix hex- means 6, and in hexene refers to the fact that it contains 6 carbon atoms in a molecule.

The chemical formula for hexene is $\text{C"_6"H"_12}$, and contains one double bond $\text{-C=C-}$, and four single bonds $\text{-C-C-}$.

There are several structural isomers of hexene based on the location of the double-bonded carbon atoms, and other factors.

The following diagram is 1-hexene, a hexene structural isomer with the double bond between carbon atoms 1 and 2.

The following hexene isomer is named 3-hexene because the double bond is between carbon atoms 3 and 4.

The following hexene isomers are called cis-3-hexene and trans-3-hexene. These are 3-hexene isomers that differ in three-dimensional space. Notice that the ${\text{-CH"_3"CH}}_{2} -$ segments are on the same side of the double bond on the cis- isomer, and on opposite sides on the trans- isomer.