What are alkenes?

Alken is a type of hydrocarbon that contains a double carbon bond. The hydrocarbons are molecules that consist only of hydrogen and carbon atoms. There are two hydrogen atoms for each carbon atom for each carbon, resulting in a chemical formula C _{n h 2n . For example, Ethen and Propen, the simplest alkenes, have chemical formulas C 2 h 4 and C 3 h 6 .}

are very similar to eyelashes. Most alkenes are liquids at room temperature, although eten, propens and buten are gases. All alkenes are insoluble in water and soluble in organic solvents.

In Alken, only one pair of carbon atoms will have double binding. Atoms of any molecules are connected together with shared electron. Double bonds occur when two electrons are shared between atoms.

With the exception of Ethen and Propen, alkenes show structural isomerism. Structural isomers have a chemical formula but different structures. PoisonNoraze atoms show free rotation, so the geometric shape of the isomer will vary. What makes the structural isomer different is the pattern of the binding, not the shape of the molecule.

For example, But-1-Ene and But-2-Je have a chemical formula C _{4 h 8 . Two of these carbon molecules will be double binding in both Bet-1 and 2, but two carbon atoms that have individual bonds are arranged differently. In Bet-1, carbons are arranged as a string, the first carbon is connected to the second with a double binding that is connected to the third with a single binding that is connected to the fourth with a single binding. In the But-2, each carbon is connected to a double carbon.}

visually, But-1-en looks like a bent line. The molecule seems to be bent up or down or bend to left or the right to a double carbon bond, the molecule is still Bet-1. On the contrary, but-2-ene looks roughly in the shape of U.

Because double bonds do not allow free rotation, it is also possible for alken to have geometric isomers. Since the But-2-EN has one carbon atom on each double-tied carbon, geometric isomer is possible. The "cis" isomer occurs when the carbons are on the same side of the molecule on the same side of the molecule, while the "trans" isomer occurs when the coal of units are on the opposite sides of the molecule.

alkenes react differently with many substances. For this reason, they are used in many industries. The reaction of some alkenes with hydrogens can create margarine, adding water to others creates certain alcohols such as ethanol, and joining molecules together to produce plastics and Teflon®.