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CHE 105/110 Introduction to Chemistry - Exercises and Answers

Branched Hydrocarbons

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QUESTION ANSWER

1.

How does a branched hydrocarbon differ from a normal hydrocarbon?

1.

A branched hydrocarbon does not have all of its C atoms in a single row.

3.

Name this molecule.

The structural formula of 3-methyl-2 hexene without representing the Hydrogen atoms present in the molecule. The compound name indicates the position of Methyl radical and the position of the double covalent bond.

3.

3-methyl-2-hexene

5.

Name this molecule.

The structural formula of 4,4 dimethyl-1-pentene without representing the Hydrogen atoms present in the molecule. The compound name indicates the position of Methyl radicals and the position of the double covalent bond.

5.

4,4-dimethyl-1-pentene

7.

Name this molecule.

The structural formula of 2,4 dimethyl-2-pentene without representing the Hydrogen atoms present in the molecule. The compound name indicates the position of Methyl radicals and the position of the double covalent bond.

7.

2,4-dimethyl-2-pentene

9.

Name this molecule.

The structural formula of 3,4 diethyl-octane without representing the Hydrogen atoms present in the molecule. The compound name indicates the position of alkyl radicals.

9.

3,4-diethyloctane

11.

Name this molecule.

Aromatic compound showing the benzene unit (six Carbon atoms in a ring, with alternating single and double Carbon bonds) and Halogen substituents (Br, Cl) in the structure.

11.

1-bromo-4-chlorobenzene

13.

Draw the carbon backbone for each molecule.

  1. 3,4-diethyloctane
  2. 2,2-dimethyl-4-propylnonane

13.

  1.  

    The structural formula of 3,4 diethyl-octane without representing the Hydrogen atoms present in the molecule. The compound name indicates the position of alkyl radicals.
  2.  

    The structural formula of 2,2 dimethyl-4-ethyl-nonane without representing the Hydrogen atoms present in the molecule. The compound name indicates the position of alkyl radicals.

15.

Draw the carbon backbone for each molecule.

  1. 4-ethyl-4-propyl-2-octyne
  2. 5-butyl-2,2-dimethyldecane

15.

  1.  

    The structural formula of 4,4 ethyl, propyl-2-nonyne without representing the Hydrogen atoms present in the molecule. The compound name indicates the position of alkyl radicals and the position of the triple bonds.
  2.  

    The structural formula of 2,2 methyl, 5-butyl-undecane without representing the Hydrogen atoms present in the molecule. The compound name indicates the position of alkyl radicals.

17.

The name 2-ethylhexane is incorrect. Draw the carbon backbone and write the correct name for this molecule.

17.

 

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