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Mailinmypocket
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[*] posted on 16-4-2013 at 12:54
Aurin


Synthesis of aurin, first picture shows the phenol and oxalic acid beginning to react. Second is of a solution of aurin.


image.jpg - 81kB image.jpg - 72kB
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kristofvagyok
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[*] posted on 18-4-2013 at 10:48


Something new: 1,4-dinitro-diacetyl obtained from a really unusual reaction.











I have a blog where I post my pictures from my work: http://labphoto.tumblr.com/
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chemcam
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[*] posted on 18-4-2013 at 11:44


I really enjoy your photos, kristofvagyok, thank you for taking the time to post them. I have browsed through your tumblr album as well, excellent work. :o



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Adas
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[*] posted on 18-4-2013 at 12:01


The photos are amazing. Could you please post the reaction? We are also interested in the chemistry, not just photos. :)



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Boffis
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[*] posted on 18-4-2013 at 12:54


@Kristofvagyok how do you get you photos to display full size instead of just a thumbnail size?
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[*] posted on 18-4-2013 at 17:14


Amazing photos kristofvagyok!
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[*] posted on 18-4-2013 at 18:35


Quote: Originally posted by Mailinmypocket  
Synthesis of aurin, first picture shows the phenol and oxalic acid beginning to react. Second is of a solution of aurin.




Is that a tremendous old process for turning s**t into gold or something like turning lead into wine?
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Mailinmypocket
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[*] posted on 18-4-2013 at 19:33


Quote: Originally posted by platedish29  
Quote: Originally posted by Mailinmypocket  
Synthesis of aurin, first picture shows the phenol and oxalic acid beginning to react. Second is of a solution of aurin.




Is that a tremendous old process for turning s**t into gold or something like turning lead into wine?


Yes. Cannot tell. Secret. Sorry ;) only hint I can give is to scavenge those litter boxes and get what'cha can!
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kristofvagyok
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[*] posted on 19-4-2013 at 12:37


Quote: Originally posted by Adas  
The photos are amazing. Could you please post the reaction? We are also interested in the chemistry, not just photos. :)

Thanks a lot!
The reaction is currently "secret", it still needs to be verfied by MS and I am planning to do a real time reaction check by NMR. If this works, something new will be published soon in a journal(:

The photos are uploaded on my blog, just it's currently not published over there, here they are just linked, this is why they are in full size.




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[*] posted on 19-4-2013 at 16:05


Just some quartz tubing I bought on eBay long ago and I was shining a laser level light into it. I wrote a company asking if they could identify the kind of quartz it was, the box of 15 tubes having the Heraeus label on it. Each tube was sealed in plastic with a printout of a half dozen specs/tolerances unique to each tube. Basically though they were all a meter by 25mm od, 19 id. They wrote me this.
"We have found some old paperwork which I can with 100% accuracy say that part#1565 was produced for Nortel and the material is Heralux WG material. That is Flame fused natural
quartz crystals. OH content 130-180ppm, <50ppm Cl We don't produce that material any more. Now it is all synthetic F300. This natural base material was taken from mines in Madagascar in Africa."

Waveguide Quartz.JPG - 53kB
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Mailinmypocket
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[*] posted on 20-4-2013 at 10:37


Quote: Originally posted by kristofvagyok  
Quote: Originally posted by Adas  
The photos are amazing. Could you please post the reaction? We are also interested in the chemistry, not just photos. :)

Thanks a lot!
The reaction is currently "secret", it still needs to be verfied by MS and I am planning to do a real time reaction check by NMR. If this works, something new will be published soon in a journal(:

The photos are uploaded on my blog, just it's currently not published over there, here they are just linked, this is why they are in full size.


With how many awesome pictures you have you could make a really nice chemistry "coffee table book", with big glossy high-def pages. I would buy a copy :P
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[*] posted on 22-4-2013 at 15:44


Apparently Reddit has a chemistry forum!

Lots of neat pictures too. I see our very own Kristof has discovered it hehe




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Pyro
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[*] posted on 22-4-2013 at 16:01


lol, If you could afford it, Any chemist in his right mind would spend the money on chems or glass. We have the wonderful viewing platform called "Internet" :D
Friends of mine go to Africa often and make a hardback picture book of every country. It is very nice, black pages with pictures and short descriptions. The actual book (not including the cover) is about 1cm thick and it costs them 100EUR to get it printed.




all above information is intellectual property of Pyro. :D
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shocked.gif posted on 22-4-2013 at 22:30
Chlorobutanol


Here are a few photos I have taken of 1,1,1-trichloro-2-methyl-2-propanol (~2g) after 5 months of storage in the garage. The temperature was not constant, between 10C and 20C, but it was safe in a dark cabinet away from light. It is showing signs of sublimation, not nearly as bad as others I have seen at five months. I performed this synthesis very well, using ACS reagents, close eye on temperature, and I believe it is fairly pure. I wasn't expecting this sublimation though.

<img src="http://i37.tinypic.com/2zzooeo.jpg" width="800" />

<img src="http://i35.tinypic.com/29diwbk.jpg" width="800" />

<img src="http://i38.tinypic.com/uvjpc.jpg" width="800" />

This is the position I normally have it in, vertical.


<!-- bfesser_edit_tag -->[<a href="u2u.php?action=send&username=bfesser">bfesser</a>: reduced image width]

[Edited on 7/7/13 by bfesser]




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kristofvagyok
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[*] posted on 23-4-2013 at 12:28


Just a small plate of sodium, approx. 200g.





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Morgan
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[*] posted on 24-4-2013 at 05:35


What's the orange tint on the metal and glove? When I was about 15 I ordered a quarter pound I think from Mallinckrodt. The UPS guy left the package with the funny warning labels with the neighbor because I wasn't home at the time.
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[*] posted on 24-4-2013 at 07:12


I've noticed that on some of my sodium too. I have a smal jar of little pieces that I use for demonstrations (water :) ), and those pieces developed a yellow film on them. It scrapes off easily and looks like saran wrap, strangely enough. My large jar of the rest of my pound of sodium, which I keep sealed most of the time, has no yellow whatsoever. Everything is stored under mineral oil. I suspect since the small jar is opened more frequently, more oxygen gets in and reacts.
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[*] posted on 24-4-2013 at 09:35


Sodium peroxide is yellow. Mine just has white/gray coating. That's a lot of sodium hehe



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[*] posted on 24-4-2013 at 14:38
AgNO3


Freshly made Silver Nitrate:




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Pyro
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[*] posted on 24-4-2013 at 15:33


How the hall did you dry that?! Mine has been in a dessicator for 2 months and it's still wet as hell.



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[*] posted on 24-4-2013 at 17:30


Quote: Originally posted by Pyro  
How the hall did you dry that?! Mine has been in a dessicator for 2 months and it's still wet as hell.


I had the wet silver nitrate on top of a square piece of thick glass that I put on top of a pot with boiling water in it, I angled the glass so that there were 4 openings for steam to vent out therefore not heating the AgNO3 too much. Also, in the beginning I used a little excess HNO3 to dissolve all the silver, then I let it sit over night, I steam dried it next morning being careful not to dry it all the way. It was basically dry two hours after that.
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Here is another nice picture, I spilled some molten lead on the garage floor, this is the result:

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This is a photo of silver acetylide detonating:


[Edited on 4-25-2013 by chemcam]




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Adas
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[*] posted on 25-4-2013 at 07:00


The lead must have contained some copper, which is known to create those rainbow colors. Or can other metals do this as well?



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mr.crow
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[*] posted on 25-4-2013 at 07:45


Quote: Originally posted by Pyro  
How the hall did you dry that?! Mine has been in a dessicator for 2 months and it's still wet as hell.


I used NaOH as a dessicant and it worked fine. Also absorbs the extra acid fumes




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[*] posted on 25-4-2013 at 09:54


Quote: Originally posted by Adas  
The lead must have contained some copper, which is known to create those rainbow colors. Or can other metals do this as well?
It's called thin-film interference and occurs with oxide layers of most metals.
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[*] posted on 25-4-2013 at 12:10


Looks just like Bismuth :)

Depending on where the lead comes from it could have any sort of alloying agents in it




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