November 24, 2024, 12:29:33 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Working out porphyrin yields  (Read 4257 times)

0 Members and 1 Guest are viewing this topic.

Offline rhyno-of-the-port

  • Regular Member
  • ***
  • Posts: 20
  • Mole Snacks: +0/-0
Working out porphyrin yields
« on: October 14, 2008, 06:55:50 AM »
How do you work out the yield for porphyrin ring systems? I added various aldehydes to propionic acid  and formed various porphyrin compounds. My question is how do you work out the theoretical yield and % yield of these structures? As i made around 0.4gof purple crystals but the theoretical yield was around 8g, thus giving me a % yield of around 5%, which is extremely low
Logged

Offline rhyno-of-the-port

  • Regular Member
  • ***
  • Posts: 20
  • Mole Snacks: +0/-0
Re: Working out porphyrin yields
« Reply #1 on: October 14, 2008, 12:24:05 PM »
no help then guys?
Logged

Offline sjb

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3653
  • Mole Snacks: +222/-42
  • Gender: Male
Re: Working out porphyrin yields
« Reply #2 on: October 14, 2008, 02:43:21 PM »
There's nothing wrong in getting a low yield in itself, so I'm not totally sure what it is you're asking...

Post some working and we'll see if there's something you're missing.
Logged

Offline rhyno-of-the-port

  • Regular Member
  • ***
  • Posts: 20
  • Mole Snacks: +0/-0
Re: Working out porphyrin yields
« Reply #3 on: October 15, 2008, 08:23:47 AM »
10mmol benzaldehyde + 10ml pyyrole + 50ml propionic acid- ----> 0.48g meso tetraphenylporphyrin (FW 714g/mol)
Logged

Offline sjb

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3653
  • Mole Snacks: +222/-42
  • Gender: Male
Re: Working out porphyrin yields
« Reply #4 on: October 18, 2008, 05:39:31 AM »
Do you have a balanced equation for this?
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links