Draw a structure for each alkane.
d. 4,7-diethyl-2,2-dimethylnonane

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Identify the parent chain: The name '4,7-diethyl-2,2-dimethylnonane' indicates that the parent chain is 'nonane', which consists of 9 carbon atoms in a straight chain.

Number the carbon atoms in the parent chain: Start numbering from the end of the chain that gives the substituents the lowest possible numbers. In this case, number from left to right.

Add the substituents: According to the name, there are two ethyl groups at positions 4 and 7, and two methyl groups at position 2.

Draw the structure: Begin with the 9-carbon chain for nonane, then add the ethyl groups (C2H5) to the 4th and 7th carbons, and the methyl groups (CH3) to the 2nd carbon.

Verify the structure: Ensure that all carbon atoms have four bonds and that the substituents are correctly placed according to the IUPAC name.

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Alkanes

Alkanes are saturated hydrocarbons consisting only of carbon (C) and hydrogen (H) atoms, connected by single bonds. They follow the general formula CnH2n+2, where n is the number of carbon atoms. Alkanes are characterized by their relatively low reactivity and are commonly found in natural gas and petroleum.

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01:20

Naming Alkanes Example

IUPAC Nomenclature

The International Union of Pure and Applied Chemistry (IUPAC) nomenclature provides a systematic way to name chemical compounds. For alkanes, names are derived from the longest continuous carbon chain, with prefixes indicating the presence of substituents. In the case of '4,7-diethyl-2,2-dimethylnonane', the numbers indicate the positions of the substituents on the main chain.

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02:39

Rules for Naming Alkanes

Structural Representation

Structural representation of organic compounds illustrates the arrangement of atoms within a molecule. For alkanes, this can be depicted using line-angle formulas, where lines represent bonds between carbon atoms. Understanding how to draw these structures is essential for visualizing molecular geometry and predicting chemical behavior.

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