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Chemistry 22.4

Hydrocarbon Rings . Beta-carotene is an important nutrient in carrots that also gives carrots their orange color. The hydrocarbon skeleton of beta-carotene contains hydrocarbon rings. You will learn about hydrocarbon rings and the properties of compounds formed from these rings.. Cyclic Hydrocarbons .

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Chemistry 22.4

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    1. Chemistry 22.4

    5. The simplest cyclic hydrocarbon has a 3-carbon ring. Rings containing up to 20 carbon atoms are found in nature. Rings with 5 or 6 carbons are the most abundant.The simplest cyclic hydrocarbon has a 3-carbon ring. Rings containing up to 20 carbon atoms are found in nature. Rings with 5 or 6 carbons are the most abundant.

    9. Aromatic Hydrocarbons The three symbols below can be used to represent the benzene ring. If the bonds are shown as alternating single and double bonds (on right), it is important to remember that bonds dont actually alternate and that all six bonds are identical.

    10. Aromatic Hydrocarbons Space-filling Model of Benzene This is a space-filling model of benzene. Applying Concepts What is the molecular formula of benzene?This is a space-filling model of benzene. Applying Concepts What is the molecular formula of benzene?

    11. Aromatic Hydrocarbons Substituted Aromatic Compounds Compounds with a substituent on a benzene ring are named as a derivative of benzene. When benzene is a substituent, it is called a phenyl group.

    12. Aromatic Hydrocarbons A benzene ring can have two or more substituents.

    13. Aromatic Hydrocarbons The molecules of many dyes include benzene rings. The molecules of many dyes include benzene rings. Dyes that contain aromatic compounds are called aniline dyes.The molecules of many dyes include benzene rings. Dyes that contain aromatic compounds are called aniline dyes.

    16. 22.4 Section Quiz. 2. The carbon-carbon bonds in a benzene molecule are alternating double and single bonds. identical hybrid bonds. all double bonds. all single bonds.

    17. 22.4 Section Quiz. 3. When an alkane has a benzene ring as a substituent, the ring is called _______ group. a benzene a toluene a phenyl an arene

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