Exam #4              Name: _______ANSWERS________________

 

Module 16 (Chapter 19) Part B: Alkyl Radicals   10 points

 

Draw the structural or semi-structural formulas for all the alkyl radicals of the first four members of the alkane series, insert a X in place of the hydrogen which is removed to make the radical and where a functional group would be substituted:

 

Methyl       CH3-X                                                                         Ethyl        CH3-CH2-X      

 

                                                       

                                                                                                                                                           

 

n-propyl                                                                                     isopropyl

                                                                                                                             CH3

                  CH3-CH2-CH2-X                                                                               |                                                                            

                                                                                                                     CH3-C-

                               

 

 

n-butyl                                                             sec-butyl

                                                                                                                       

               CH3-CH2-CH2- CH2-X                                                      CH3-CH2-CH- CH3                                                  

                                                                                                                               |

                                                                                                                              X                                                                                                          

                  

                                   

 

 

 

Isobutyl                                                   t-butyl or tert-butyl

                             CH3                                                                                                          CH3

                               |                                                                                      |

         CH3-CH-CH2-X                                                            CH3-C-CH3

                                                                                                          |

                                                                                                         X

                                   

 

 

Bonus:  Predict and Draw the following alkyl groups:

n-pentyl                                 isopentyl                                           neopentyl

 

This is a critical thinking bonus, the last two are not in the book.

 

 

Corwin’s Table 19.2

 

 

 Hein’s Table 19.2

 

                                                           

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