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how do you reduce a benzene ring to a cyclohexane?

Discussion in 'MCAT Study Question Q&A' started by BoneMental, May 20, 2011.

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  1. BoneMental

    BoneMental

    119
    1
    Jan 31, 2011
    SW
    Is it possible to do? What are the various ways?

    Can't you use Pt/H2? Or Ni/H2? I tried looking this up on google and all I got was some weird forum in Britain....
     
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  3. malpractician

    malpractician 5+ Year Member

    143
    0
    Feb 15, 2009
    Texas
    yes, it's called hydrogenation. Just about any Ochem textbook should have clear examples on this.

    Pt/h2 and Pd/h2 are the common ones, there's others like Lindlar that take triple bonds to double bonds.
     
  4. BoneMental

    BoneMental

    119
    1
    Jan 31, 2011
    SW

    Thanks dude! I thought so, but I just wanted to make sure.
     
  5. Cool Beans

    Cool Beans 7+ Year Member

    79
    5
    Apr 5, 2010
    Be careful on this one. If you simply add H2/Pt like with an alkene, benzene doesn't react due to its stability (since it's aromatic). The rxn still needs a catalyst (Pt, Pd, Ni, etc.) but only works if the pressure of H2 is really high (like 1500 psi).
     
  6. dreamer67

    dreamer67 2+ Year Member

    208
    0
    Apr 9, 2011
    you use H2 Rh/C catalyst. I don't believe you need to know this for the MCAT though. Aromatics are no longer an official AAMC topic
     

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