CHM 2210C Chapter 3 Sample Exam Answers

 

Chapter 3 Part B: Alkyl Radicals   8 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 (propyl)                                      isopropyl (1methylethyl)

                                                                                                                             CH3

                  CH3-CH2-CH2-X                                                                               |                                                                            

                                                                                                                     CH3-C-X

                               

 

 

n-butyl (butyl)                                            sec-butyl (1methylpropyl)

                                                                                                                       

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

                                                                                                                               |

                                                                                                                              X                                                                                                          

                  

                                   

 

 

 

Isobutyl (2methyl propyl)                       t-butyl or tert-butyl (1,1Dimethyl ethyl)

                             CH3                                                                                                          CH3

                               |                                                                                      |

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

                                                                                                          |

                                                                                                         X

                                   

 

 

Bonus:  Predict and Draw the following alkyl groups:

phenyl                                   isopentyl                                           neopentyl

 

 

 

 

 

 

 

 

Corwin’s Table 19.2

 

 Hein’s Table 19.2

 

                                                          

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Bonus: Draw one of the following: phenyl; neo-pentyl; or isopentyl

 

 

                                                          

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