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#ALKENE HYDROCARBON WITH 6 CARBONS AND DOOBLE BONDS HOW TO#
#ALKENE HYDROCARBON WITH 6 CARBONS AND DOOBLE BONDS SERIES#

In simpler compounds, you can also add the number before the root for the carbon chain length, so but-1-ene could be 1-butene. Identify which carbon in the chain the alkene begins at, and use this number with '–ene' as the suffix.Count the carbon chain length to find the base of the compound's name.Alkene double bonds are named similarly to branches in an alkane:.See the table below for the first five alkenes. Using the nomenclature in Organic chemistry introduction, we can name simple alkenes.This is an important test for a double bond because alkanes do not have a double bond so bromine does not react with it.With ethene, this reaction has the equation: A colorless dibromoalkane product forms in their place. The double bond in the alkene molecule reacts with a bromine molecule and opens up in an addition reaction, using both reactant molecules up. The brown color caused by bromine water disappears because bromine (Br2) is being reacted away.

We say that alkenes decolorize bromine water.

When an alkene solution is added to bromine water, the brown color of the bromine solution will go colorless.

You can use bromine water to test for alkenes:.

This is another example of an addition reaction of alkenes where the HCl molecule adds across the C=C double bonds.

Alkenes can react with hydrogen halides in an addition reaction:.

Practically, this just means it requires more oxygen to burn cleanly because there are more C-C bonds (with the double bond present) to have to break up. Alkenes produce more soot when burning than alkanes do, which have a cleaner flame.

Just like alkanes, alkenes are flammable, reacting with oxygen in combustion reactions.

Like a sponge saturated by water, an alkane is saturated by bonds it cant form any more bonds, but alkenes can so it is unsaturated./li>

This is where the terms saturated and unsaturated come from.

We call reactions that open up the C=C bond addition reactions.

This is especially true of ethene, the smallest alkene, which is the monomer unit of the important plastic polymer (poly)ethene.Īlkenes can make two new bonds with other atoms by opening up this double bond. This means alkenes are very useful for making polymers, which are very long chains of hydrocarbons made by a repeating unit.

Alkenes are more reactive than alkanes because their double bond(s) can be opened up by chemical reactions it is a more reactive bond than a single bond.

If you compare to an alkane with the formula C nH 2n+2 an alkene has lost the +2 because of the C=C double bond now present. This means that in a simple alkene (only one double bond) there are twice as many hydrogen atoms as there are carbon atoms. This C=C double bond is the functional group that defines a molecule as an alkene.Īlkenes have the general formula: C nH 2n. Alkenes are unsaturated hydrocarbons with one or more carbon-carbon double bonds.

#ALKENE HYDROCARBON WITH 6 CARBONS AND DOOBLE BONDS SERIES#

Like alkanes, alkenes are another homologous series of hydrocarbons. This means that not all the bonds made by carbon are single bonds, they also contain double or triple bonds, to either carbon or another atom. However, many organic compounds are unsaturated. We saw in Alkanes that alkanes are saturated hydrocarbons, compounds made of only carbon and hydrogen atoms where carbon makes only single bonds.

#ALKENE HYDROCARBON WITH 6 CARBONS AND DOOBLE BONDS HOW TO#

How to name alkenes using IUPAC organic nomenclature.How to test for alkenes in a chemical reaction.The major uses and properties of alkenes.The definition of an alkene and their general formula.Identify the mistake in each one, and correct it to give the correct IUPAC systematic name. Interpret IUPAC systematic names of chemicals by applying organic nomenclature.Apply organic nomenclature to draw structural formula of alkenes.ĭraw the structural or skeletal formula for the following compounds using their IUPAC systematic names.Chemical B is a simple hydrocarbon with three carbon atoms in a straight chain.Explain why this change was seen with chemical B and not with chemical A.What was observed when chemical B was mixed with bromine water?.In the test tube with chemical B and bromine water, there was a noticeable change in the solution. The student observed no change in the test tube with chemical A and bromine water. Recall the test to distinguish alkenes and alkanes.Ī student has solutions of two simple hydrocarbons, chemical A and B, and adds them separately to two identical test tubes containing a solution of bromine water.Study the following chemical formulae and identify which fit the general formulae of an alkene.