Topic: Working out porphyrin yields (Read 4256 times)

rhyno-of-the-port · « **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

rhyno-of-the-port · « **Reply #1 on:** October 14, 2008, 12:24:05 PM »

no help then guys?

sjb · « **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.

rhyno-of-the-port · « **Reply #3 on:** October 15, 2008, 08:23:47 AM »

10mmol benzaldehyde + 10ml pyyrole + 50ml propionic acid- ----> 0.48g meso tetraphenylporphyrin (FW 714g/mol)

sjb · « **Reply #4 on:** October 18, 2008, 05:39:31 AM »

Do you have a balanced equation for this?

Topic: Working out porphyrin yields (Read 4256 times)

rhyno-of-the-port

Working out porphyrin yields

rhyno-of-the-port

Re: Working out porphyrin yields

sjb

Re: Working out porphyrin yields

rhyno-of-the-port

Re: Working out porphyrin yields

sjb

Re: Working out porphyrin yields

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