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Topic: Working out porphyrin yields  (Read 4012 times)

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Offline rhyno-of-the-port

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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
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Offline rhyno-of-the-port

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Re: Working out porphyrin yields
« Reply #1 on: October 14, 2008, 12:24:05 PM »
no help then guys?
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Offline sjb

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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.
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Offline rhyno-of-the-port

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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)
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Offline sjb

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Re: Working out porphyrin yields
« Reply #4 on: October 18, 2008, 05:39:31 AM »
Do you have a balanced equation for this?
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