Greetings Nexians!
Before I begin let me explain I have a back ground in organic chemistry.
I do not have a degree but I have prepared energetics and my own reagents from scratch for years now. I've done some of the more complicated reactions with very high sucess, asking for help on this is a little embarrassing :/
I've read the FAQs and browsed forums on multiple sites, however I can't find a solution to what could've gone wrong so I'll state my proceedure:
First, a 2000mL borosilicate beaker was filled with distilled water and saturated with 75g NaOH and was allowed to clear and cool to RT. 100g of pulverized MHRB was added to this solution and was agitated for 30 minutes to promote even lysification. I then dropped a stirrbar into the solution and let it mix at a high interval.
After some time had passed I decanted the slurry into an erlenmeyer flask and heated some CH2Cl2 to boiling and added 50mL to the solution. I allowed for the layers to form. I transfered all of the organic layer from the solution and part of the aqeuous layer to an sep. funnel.
I cut the DCM layer leaving just enough with the aqueous layer to avoid contamination and returned everything back to the beaker and continued stirring. I don't have a rotovap and I feared distilling off the solvent under reduced pressure would present an unwanted challenge to collecting crystals so I decided to pour off the solvent layer into a baking dish. Everything can be refined later. I setup a fan and played video games...
I checked back after everything was evapped, to my dissapointment I had no crystals, aside from maybe 10-12 rather small 'freckles', however they fit the profile. When I attempted to remove the precipitate not all was in order: I was scrapping a gummy film off the glass dish and the crystals where lost in the yellow goop. I put this goop into a test tube and heated some heptane. I added boiling heptane dropwise until everything was disolved except for a solid brown chunk I discarded. I poured the heptane off into a 100mm crystalizing dish and stuck it in the freezer overnight.
The next morning to my horror was more yellow resin and some more freckles, none of which would scrape off so I gave up and sanitized my dish. This time to not be defeated I added 50mL boiling naptha into a 2000mL erlenmeyer with my alkaloid enriched water layer. I stired this in thoroughly and after it settled I removed it to a seperatory funnel. I dropped the bottom aqueous layer and kept the top solvent layer. My naptha was now slightly yellow so I had good spirits. By now I was slightly concerned about oxide formation so to keep everything as 'solid' as possible I placed my evap dish over an ice bath to keep the dmt cool and to destroy the soluability of the naptha. I turned the fan on and went to work. When I came back I discovered a couple droplets of alkaloid resin Ithat;s it, 2 extremely small drops) and nothing scrapable. I repeated this for the next coupke days continuously mashing and stirring the mhrb beaker until I was certain of a very thorough lysis.
From 100g pulverized/shredded mhrb my yield was 0.00g of anything. What could I have done wrong? I have never failed an oppenhauer oxidation yet I can't manage an extraction that 'any idiot could do'?
before I dump everything and start over I'd like to try an A/B extraction using a weak acid. Or trying a seperation with chromatography but that would be a waste and rather extreme measure. I think after a vacume filtration an a/b extraction is my best bet..
If anyone catches my errors here I would greatly apriciate any criticism, I'd love to finally cross into the void and begin my journey :/
Before I begin let me explain I have a back ground in organic chemistry.
I do not have a degree but I have prepared energetics and my own reagents from scratch for years now. I've done some of the more complicated reactions with very high sucess, asking for help on this is a little embarrassing :/
I've read the FAQs and browsed forums on multiple sites, however I can't find a solution to what could've gone wrong so I'll state my proceedure:
First, a 2000mL borosilicate beaker was filled with distilled water and saturated with 75g NaOH and was allowed to clear and cool to RT. 100g of pulverized MHRB was added to this solution and was agitated for 30 minutes to promote even lysification. I then dropped a stirrbar into the solution and let it mix at a high interval.
After some time had passed I decanted the slurry into an erlenmeyer flask and heated some CH2Cl2 to boiling and added 50mL to the solution. I allowed for the layers to form. I transfered all of the organic layer from the solution and part of the aqeuous layer to an sep. funnel.
I cut the DCM layer leaving just enough with the aqueous layer to avoid contamination and returned everything back to the beaker and continued stirring. I don't have a rotovap and I feared distilling off the solvent under reduced pressure would present an unwanted challenge to collecting crystals so I decided to pour off the solvent layer into a baking dish. Everything can be refined later. I setup a fan and played video games...
I checked back after everything was evapped, to my dissapointment I had no crystals, aside from maybe 10-12 rather small 'freckles', however they fit the profile. When I attempted to remove the precipitate not all was in order: I was scrapping a gummy film off the glass dish and the crystals where lost in the yellow goop. I put this goop into a test tube and heated some heptane. I added boiling heptane dropwise until everything was disolved except for a solid brown chunk I discarded. I poured the heptane off into a 100mm crystalizing dish and stuck it in the freezer overnight.
The next morning to my horror was more yellow resin and some more freckles, none of which would scrape off so I gave up and sanitized my dish. This time to not be defeated I added 50mL boiling naptha into a 2000mL erlenmeyer with my alkaloid enriched water layer. I stired this in thoroughly and after it settled I removed it to a seperatory funnel. I dropped the bottom aqueous layer and kept the top solvent layer. My naptha was now slightly yellow so I had good spirits. By now I was slightly concerned about oxide formation so to keep everything as 'solid' as possible I placed my evap dish over an ice bath to keep the dmt cool and to destroy the soluability of the naptha. I turned the fan on and went to work. When I came back I discovered a couple droplets of alkaloid resin Ithat;s it, 2 extremely small drops) and nothing scrapable. I repeated this for the next coupke days continuously mashing and stirring the mhrb beaker until I was certain of a very thorough lysis.
From 100g pulverized/shredded mhrb my yield was 0.00g of anything. What could I have done wrong? I have never failed an oppenhauer oxidation yet I can't manage an extraction that 'any idiot could do'?
before I dump everything and start over I'd like to try an A/B extraction using a weak acid. Or trying a seperation with chromatography but that would be a waste and rather extreme measure. I think after a vacume filtration an a/b extraction is my best bet..
If anyone catches my errors here I would greatly apriciate any criticism, I'd love to finally cross into the void and begin my journey :/

