Alkenes is a chemical compound which is unsaturated belongs to the hydrocarbon family, which are the compounds which contain hydrogen and carbon both. The two of them are as:
Ethane C2 H4
Propane C3 H6
We can work on any formula on any of them which is Cn H2n. The table remains restricted to only these first two. Presence of isomers behind it is a major reason of it which intensely affect the names.
Structural Isomerism
Every Alkenes which have got four, or more than four carbon atoms in themselves show structural isomerism. What it actually mean is that it has two or two plus structural formulas which can be extracted of each of the molecular formulas. A very good and substantial example can be off with C4H8, it is actually not very difficult to come up with the tisomers which is three structural oriented.
Geometric orcis-trans isomerism
The carbon-carbon doubled bond do not give access to rotation about it. What it actually mean is that it there is always a chance to get CH3 groups. These groups can be on both sides of the molecule. The teo options are that either the group is on one side of the molecule or on the other side. They are also called cis but-2-ene (this is a situation when the groups are located on same side) or trans-but-2-ene (a situation when they are located at the opposite sides).
Physical Properties
One of the major points to be discussed id that the boiling points of each of the Alkenes is extremely similar to the one as of the Alkenes having carbon atoms of the same number. Propene and Ethene are some of the various gases at the room temperature. Rest of them that we expect are possibly to come across are the liquids.