Benzyl vs Phenyl? -chemistry

• OHSheet

  4 Aug 09, 19:08

  Hi,

   

  Im not sure when to use the naming for Benzyl or Phenyl to represent the benzene ring side branch.

  eg...

   

  why is it that

  H                       H

    |                        |

    C        =           C

     |                        |

    H                      (O)*

   

   

  where(O)* represents the benzene ring...

  This molecule is named as Benzyl ethene

  However...

   is it also alright for it to be named Phenyl ethene???

   

  Whereas,, eg...

       Br                      F  

        |                         |

  H- C         -            C - H

        |                         |

       Br                     (O) --benzene ring

   

  1,1-dibromo- 2-fluoro-2-phenyl-ethane.

   

  Why cant it be possible for the "phenyl" to be replaced with a benzyl instead?? Since they both reprensent the same benzene ring??

   

  Thanks ! :D

• dkcx

  4 Aug 09, 20:11

  Originally posted by OHSheet:

  Hi,

   

  Im not sure when to use the naming for Benzyl or Phenyl to represent the benzene ring side branch.

  eg...

   

  why is it that

  H                       H

    |                        |

    C        =           C

     |                        |

    H                      (O)*

   

   

  where(O)* represents the benzene ring...

  This molecule is named as Benzyl ethene

  However...

   is it also alright for it to be named Phenyl ethene???

   

  Whereas,, eg...

       Br                      F  

        |                         |

  H- C         -            C - H

        |                         |

       Br                     (O) --benzene ring

   

  1,1-dibromo- 2-fluoro-2-phenyl-ethane.

   

  Why cant it be possible for the "phenyl" to be replaced with a benzyl instead?? Since they both reprensent the same benzene ring??

   

  Thanks ! :D

  Where did u get the name Benzyl ethene from?

• OHSheet

  4 Aug 09, 21:38

  I think its either benzyl ethene or

  its ethylene benzyl.

  Its just the systematic name for Styrene.

• SBS2601D

  4 Aug 09, 21:43

  Why cant it be possible for the "phenyl" to be replaced with a benzyl instead?? Since they both reprensent the same benzene ring??

  http://www.chem.ucalgary.ca/courses/350/orgnom/aromatics/aromatics-04.html

• OHSheet

  4 Aug 09, 22:48

  Originally posted by SBS2601D:

  Why cant it be possible for the "phenyl" to be replaced with a benzyl instead?? Since they both reprensent the same benzene ring??

  http://www.chem.ucalgary.ca/courses/350/orgnom/aromatics/aromatics-04.html

  THANKS LOOOOTS!!! :DD

• dkcx

  4 Aug 09, 23:12

  Originally posted by OHSheet:

  I think its either benzyl ethene or

  its ethylene benzyl.

  Its just the systematic name for Styrene.

  Checking up on styrene MSDS, the closest i seen is phenyl ethylene or what u all call phenyl ethene and not benzyl.

  Post your source? I think its wrong which is why i edited my post and remove the explaination for what is benzyl n phenyl since your source seems to be wrong.

• UltimaOnline

  4 Aug 09, 23:29

  For the record :

   

  "Phenyl" refers to the benzene ring alone. Eg. phenyl chloride = chlorobenzene.

   

  "Benzyl" refers to the benzene ring with an additional CH2 group. Eg. benzyl chloride = chloromethylbenzene.

   

   

  Edit : ok, I see SBS2601D aleady posted a link which basically says what I just said.