November 26, 2024, 08:22:04 AM
Forum Rules: Read This Before Posting


Topic: Oxidation of secondary alcohol to ketones  (Read 5121 times)

0 Members and 1 Guest are viewing this topic.

Offline siriipha

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Oxidation of secondary alcohol to ketones
« on: April 08, 2014, 01:20:03 PM »
I need to write an balanced equation to the oxidation of 2-octanol to 2-octanone. In the lab we used Ca(OCl)2 as the oxidizing agent, and water. The reaction happens in a aciditc solution as CH3COOH and CH3CN was also in the mixture, before it got extracted away and washed with Dichloromethane, NaHCO3 and water, then Dichloromethan was evaporated away from the solution and pure 2-octanone was obtained from a fractional-destillation.

I draw the 2-octanol and 2-octanon molecule and found out that they oxidized with +3e-, which gives me:

Ox: C8H17OH -----> C8H16O + 3e- + 2H+
Red: Ca(OCl)2 + ? ----> Ca2+ + 2OCl-
Balanced: ?

I cant see how Ca(OCl)2 get reduced in the reaction?? I wrote the oxidation numbers and Cl went from +1 to +1.5 in 2OCl-? 


Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27862
  • Mole Snacks: +1813/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Oxidation of secondary alcohol to ketones
« Reply #1 on: April 08, 2014, 02:27:03 PM »
How did you got 1.5 for chlorine in OCl-?
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline siriipha

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Re: Oxidation of secondary alcohol to ketones
« Reply #2 on: April 08, 2014, 04:01:47 PM »
How did you got 1.5 for chlorine in OCl-?
I calculated with 2OCl-. But I figured out I just need to use ClO- as the oxidation agent.
the balanced equation should be:

ox: C8H17OH --> C8H16O + 2e + 2H+
red: ClO- + 2e- + 2H+ --> Cl- + H2O
Balance: C8H17OH + ClO- --> C8H16O + Cl- + H2O

if I´m not wrong.

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27862
  • Mole Snacks: +1813/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Oxidation of secondary alcohol to ketones
« Reply #3 on: April 09, 2014, 02:34:05 AM »
Looks correct now.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Sponsored Links