Alkenes, Alkynes and Aromatic Compounds
Alkenes contain at least one double bond. Alkynes contain at least one triple bond. Most of these types of hydrocarbons can exist with the same chemical formula in different form or chemical structure. When a compound has the same chemical formula but two possible structures, these two structures are called isomers. Alkenes are unsaturated since they have a double covalent carbon bond. Alkenes have the general formula CnH2n. Alkynes (acetylenes) are unsaturated encyclical hydrocarbons which contain one or more triple bonds between atoms of carbon. The general formula for alkynes is CnH2n-2
Aromatic hydrocarbons contain the 6-membered benzene ring structure that is characterized by alternating double bonds. Thus, they have formulas that can be drawn as cyclic alkenes, making them unsaturated. Benzene, C6H6, is the simplest member of a large family of hydrocarbons, called aromatic hydrocarbons. Aromatic compounds more readily undergo substitution reactions than addition reactions; replacement of one of the hydrogen atoms with another substituent will leave the delocalized double bonds intact.
- Saturated and Unsaturated hydrocarbons
- Polycyclic Aromatic Hydrocarbons and Cancer
- Geometric Isomers
- Stereochemistry
- Element of unsaturation
- Cis and trans isomers
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