Cyclohexane

If you knew that you had either cyclohexane or cyclohexene in the lab but weren't sure which, how could you determine which it was?

Thanks from Sheryl

Since I'm not an organic chemist I would think of an organic test LAST. Density, refractive index, and boiling points of both are too close to differentiate. However, the melting point of cyclohexane is +6 something and cyclohexene is -103 something. +6 should be easily attainable in the lab. That's what I would do. Check out those numbers in your tables. Everyone will tell you not to rely on physical properties but pure samples can tell you a lot. If not that I would try IR and/or NMR. The double bond should be visible in IR. And NMR should show a CH group which the cyclohexane doesn't have. The books tell me n-bromosuccinimide (NBS) will brominate cyclohexene MUCH faster than it will cyclohexane but nothing about how much faster or if the rate is sufficiently different to differentiate between the two.

  1. 👍 0
  2. 👎 0
  3. 👁 58
asked by Sheryl

Respond to this Question

First Name

Your Response

Similar Questions

  1. CHEM

    What is the major product from an elimination reaction starting with 2-bromo-1-methylcyclohexane? would it be: a) 1-methyl-1-cyclohexene b) a cyclohexane/ene with a double bond off of one C - basically the cyclohexane shape with

    asked by k on March 12, 2008
  2. chemistry

    In a lab experiment I added Br2 to hydrocarbons cyclohexane, cyclohexene, and toluene. A loss of color would indicate a reaction took place. Only the cyclohexene lost color and turned clear. I guess this means that the Br2 broke

    asked by john on February 20, 2012
  3. Organic Chemistry Please help!

    1. How could you distinguish between cyclohexane and cyclohexene using IR only?

    asked by ladi on February 18, 2009
  4. biochemistry

    show how to convert cyclohexanol to these compounds? a) cyclohexene b) cyclohexane c) cyclohexanone d) bromocyclohexane

    asked by vaishu on February 18, 2008
  5. Chemistry

    I just need someone to check over my answers, I'm pretty confident in all of them! In which six-membered hydrocarbon rings are all of the C-C-C angles roughly the same, i.e., within 1o? Select ALL that apply. Question 1 options:

    asked by Dan on December 9, 2015
  6. Organic Chemistry

    How could you distinguish between cyclohexane and cyclohexene using Infrared Spectroscopy only? How could you distinguish between 1-hexene and 1-hexyne using IR only?

    asked by Blair on February 11, 2009
  7. Chemistry

    Adding 1.00 g of benzene, C6H6, to 80 g of cyclohexane, C6H12, lowers the freezing point of the cyclohexane from 6.5 to 3.3 degree celsius. What is the value of kf for cyclohexane?

    asked by Robin on December 2, 2015
  8. Chemistry

    What would be the effect of each of the following on the calculated molecular weight of the solute? a) some cyclohexane evaporated while the freezing point of pure cyclohexane was being measured. ( i think it would be higher)

    asked by Jim on January 29, 2013
  9. Chemistry

    Determine the molar mass of a compound and its molecular formula if a solution of 1.00 g of the unknown is dissolved in 50 grams of cyclohexane. Cyclohexane freezes at 6.02 oC. The normal freezing point of cyclohexane is 6.50 oC

    asked by Megan on December 4, 2013
  10. Organic Chem

    I have a question on how to distinguish cyclohexane from benzene through lab tests i.e. chemical reactions (except for burning and observing the amount of soot produced, because it is not a very conclusive test) So far the only

    asked by Hayyley on January 28, 2011

More Similar Questions