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Organic Chemistry

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More Lessons for High School Chemistry

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A series of free High School Chemistry Video Lessons.

In this lesson, we will learn

  • Hydrocarbon
  • Alkanes
  • Alkenes - Alkynes
  • Naming Alkenes - Naming Alkynes

Hydrocarbon are the simplest types of organic compounds which contain only carbon and hydrogen. There are several types of hydrocarbons including halocarbons, alcohols, ethers, amines, aldehydes, keytones and carboxylic acids.
An introduction to the simplest type of organic compound.
Alkanes are hydrocarbons that only consist of single bonds. The ratio of carbon atoms to hydrogen atoms in alkanes is always in the form of n: 2n + 2.
Naming Alkanes
Naming alkanes can be difficult because each alkane consists of a parent chain and one or more branches. First, it is necessary to count the number of atoms in the longest chain. Then we name the branches based upon how many atoms they contain and number the branches by the atom in the parent chain they connect to, keeping the numbers as low as possible. For multiple identical branches, prefixes are necessary to indicate quantity.
Naming Simple Alkanes

Alkenes - Alkynes
Alkenes and alkynes are unsaturated bonds that contain one or more double or triple bonds (e.g., ethene, propene, butene, etc.) and have different chemical compounds and properties. Their properties are similar to those of alkanes meaning that they are non-polar, have low solubility in water and have low melting and boiling points. Alkenes and alkynes are much more reactive than alkanes.
The rules in naming alkenes and alkyles are generally similar to naming alkanes, but also include denoting multiple bonds. First, it is necessary to count the number of atoms in the longest chain. Then we number the branches, always using the lowest numbers possible. Finally, chains or branches that include multiple bonds have different suffixes.
An introduction to alkenes and alkynes.
Introduction to Alkene and Alkyne Structures and Nomenclature
This video describes the structures and IUPAC nomenclature of Alkenes and Alkynes. Introducing double and triple bonds into hydrocarbons changes the game a bit. Since they are functional groups, these bonds get special consideration during naming. Learn how it works here.
Alkenes and Alkynes
This video talks about the deliciousness of alkenes & alkynes, their structures, and how to remember which is which by simply knowing the alphabet. Also, he breaks down hydrogenation, halogenation, polymerization, and triglycerides all while helping us figure out the meaning of different names for fats.
Alkenes & Alkynes 1:14
Naming Rules 1:39
Cis-Trans Isomerism 3:29
Hydrogenation, Halogenation, Polymerization, and Triglycerides 4:40
Meanings of Fat Names 5:50


You can use the Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem. Then click "Answer" to check your answer.

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