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uzaymaymunu
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[*] posted on 22-1-2013 at 10:13


My little birthday party :P Burning mix: sugar rocket fuel, mg powder and KClO3


And Ferrofluid

<img src="https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/544806_10150706157984024_2108355769_n.jpg" width="800" />

[Edited on 22-1-2013 by uzaymaymunu]

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

[Edited on 7/7/13 by bfesser]




uzaymaymunu.blogspot.com
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Mailinmypocket
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[*] posted on 22-1-2013 at 10:26


Quote: Originally posted by uzaymaymunu  
My little birthday party :P Burning mix: sugar rocket fuel, mg powder and KClO3


And Ferrofluid

<img src="https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/544806_10150706157984024_2108355769_n.jpg" width="800" />

[Edited on 22-1-2013 by uzaymaymunu]


Wow! The awesome smell of burnt sugar must have permeated your house!

<!-- 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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Valentine
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[*] posted on 24-1-2013 at 05:27



<img src="http://i48.tinypic.com/28s7ijc.jpg" alt="lucigenin" title="Lucigenin" />

Crystals of some freshly prepared lucigenin
(10,10'-Dimethyl-9,9'-biacridinium dinitrate)
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Boffis
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[*] posted on 24-1-2013 at 14:37


@ Valentine

Nice crop of crystals. Would you post details of your synthesis or at least a reference please?
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Mailinmypocket
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[*] posted on 26-1-2013 at 13:08


A molybdenum compound in formation
image.jpg - 86kBimage.jpg - 88kB

[Edited on 26-1-2013 by Mailinmypocket]
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Morgan
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[*] posted on 26-1-2013 at 19:23


There's a small plastic-coated disc magnet the spark skirts over to reach ground, thus the segmented spark. A 10 foot piece of gray pvc purchased for under 2 dollars was cut to a 6 foot length. A paper towel was sleeved over the tubing, charging the fruit. This evolved from first testing fruit as an electrode atop an empty metal jar.
http://www.youtube.com/watch?v=0HlovqIMGkM
http://www.youtube.com/watch?v=P-NbshIOJmc

Grapefruit Electrode.JPG - 68kB Grapefruit Sparking.JPG - 69kB Grapefruit on Watermelon.JPG - 74kB


[Edited on 27-1-2013 by Morgan]
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Valentine
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[*] posted on 27-1-2013 at 03:38


Quote: Originally posted by Boffis  

Nice crop of crystals. Would you post details of your synthesis or at least a reference please?

Started with anthranilic acid,
1. diazotized then decomposed via Sandmeyer reaction to get o-chlorobenzoic acid (general procedure)
2. Ullmann reaction between aniline and o-chlorobenzoic acid (Organic Syntheses, Coll. Vol. 2, p.15, 1943)
3. Intramolecular condensation of N-phenylanthranilic acid to acridone (Organic Syntheses, Coll. Vol. 2, p.15, 1943)
4. Methylation of acridone with methyl iodide to get N-methylacridone (general procedure)
5. Reductive coupling of N-methylacridone with zinc to get N,N'-dimethyl-9,9'-biacridine
6. Dissolving N,N'-dimethyl-9,9'-biacridine in hot dilute nitric acid, lucigenin crystallizing out on cooling
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[*] posted on 27-1-2013 at 07:51


Synthesis, including intermediates:

http://www.youtube.com/user/chemx01/videos?view=0

Very good youtube site, highly recommended

Quote: Originally posted by Valentine  
Quote: Originally posted by Boffis  

Nice crop of crystals. Would you post details of your synthesis or at least a reference please?

Started with anthranilic acid,
1. diazotized then decomposed via Sandmeyer reaction to get o-chlorobenzoic acid (general procedure)
2. Ullmann reaction between aniline and o-chlorobenzoic acid (Organic Syntheses, Coll. Vol. 2, p.15, 1943)
3. Intramolecular condensation of N-phenylanthranilic acid to acridone (Organic Syntheses, Coll. Vol. 2, p.15, 1943)
4. Methylation of acridone with methyl iodide to get N-methylacridone (general procedure)
5. Reductive coupling of N-methylacridone with zinc to get N,N'-dimethyl-9,9'-biacridine
6. Dissolving N,N'-dimethyl-9,9'-biacridine in hot dilute nitric acid, lucigenin crystallizing out on cooling
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Boffis
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[*] posted on 28-1-2013 at 18:36


@ Valentine

Thanks for the outline for lucigenin.

I actually did a search online line and found this:



Attachment: Lucigenin preperation JACS 1982.pdf (1.3MB)
This file has been downloaded 416 times
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Xenon1898
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thumbup.gif posted on 2-2-2013 at 00:51


Quote: Originally posted by Valentine  

<img src="http://i48.tinypic.com/28s7ijc.jpg" alt="lucigenin" title="Lucigenin" />

Crystals of some freshly prepared lucigenin
(10,10'-Dimethyl-9,9'-biacridinium dinitrate)


Nice The name of the chemical alone is worth the post! But I love the yellow hue too.




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kristofvagyok
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[*] posted on 2-2-2013 at 16:35


Have any of you made isocyanides? I just made some and I would say 3 things: it has a really bad odor, it causes a really massive headache what won't cease from anything and it goes through latex gloves.
-in your body isocyanides isomerize to cyanides, so be smart when working with these :D



-they are highly UV active and my compound had a really nice color as seen above. Click on the pics and see my other pictures(:




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mr.crow
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[*] posted on 4-2-2013 at 12:40


Wow! Who would have though something so unpleasant would be so pretty.



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UnintentionalChaos
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[*] posted on 4-2-2013 at 17:56


Quote: Originally posted by kristofvagyok  

-in your body isocyanides isomerize to cyanides, so be smart when working with these :D


I kinda have my doubts about that (not that nitriles are particularly hazardous in many cases). I would expect hydration to N-alkyl-formamides to be their primary fate.

[Edited on 2-5-13 by UnintentionalChaos]




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Valentine
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[*] posted on 5-2-2013 at 08:52




Playing with some lucigenin
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[*] posted on 5-2-2013 at 09:05


@Valentine

I like than!
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kristofvagyok
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[*] posted on 5-2-2013 at 13:47


Valentine, this pics with lucigenin is simply amazing.
I have just found a few g of it in the lab, I'm going to try out something with it tomorrow(:




I have a blog where I post my pictures from my work: http://labphoto.tumblr.com/
-Pictures from chemistry, check it out(:

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BromicAcid
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[*] posted on 5-2-2013 at 15:06


Quote: Originally posted by kristofvagyok  
Have any of you made isocyanides?


Methyl, butyl, pentyl, methylisocyanoacetate, ethylisocyanoacetate, and 2-napthylisocyanide. They're the types of chemicals where you make the person running them wear a saranex suit when they come out of the lab to keep the stink inside.




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[*] posted on 6-2-2013 at 09:47


75g of lead acetate- prepared with lead powder, 80% acetic acid and 35% H2O2 in a reflux setup. It only took about half an hour for the 47.5g of lead to dissolve completely and it was very exothermic. Now... Time to make a coffee and sweeten it ;)


image.jpg - 105kB
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[*] posted on 6-2-2013 at 10:03


It looks so beautiful... and yet must be so deadly.



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[*] posted on 6-2-2013 at 10:16


Quote: Originally posted by Mailinmypocket  
75g of lead acetate- prepared with lead powder, 80% acetic acid and 35% H2O2 in a reflux setup. It only took about half an hour for the 47.5g of lead to dissolve completely and it was very exothermic. Now... Time to make a coffee and sweeten it ;)




Those crystals are AMAZING :) a few weeks ago, I had a dream that I couldn't resist eating some Pb(OAc)2 :D




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[*] posted on 6-2-2013 at 11:07


The key to making the crystals was extremely slow cooling. I put the hot syrupy liquid into an insulated thermos lunchbox, wrapped a towel around the beaker and sealed up the lunchbox. Even 5 hours later the beaker was still warm but no crystals, only the next morning I found the mass crystallized, yay!
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[*] posted on 6-2-2013 at 19:21


The barium salts or complexes of alloxan 5 oxime grown under the microscope. Why you sometimes get two distinct compounds forming is not clear they are both Ba oximates.

Ba violurate 5.jpg - 71kB
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[*] posted on 7-2-2013 at 08:33


A copper sulfate crystal that grew in one of my beakers. To the right, copper sulfate is combined with ammonium sulfate (white, far right) to form the ionic salt Cu(NH4)2(SO4)2 , a nice robin's egg blue. This is an example of a Tutton salt, with the general formula [M(II)][M(I)]2(SO4)2, where M are cations.

To the left, copper sulfate has been complexed with ammonia (far right). The ammonia ligands interact with the copper's d orbitals, causing the color to change to a deep indigo.

I think it's a neat illustration of the ionic compound being a 'dilution' of color whereas the covalent bonding alters the color.

copper ammonia sulfate_small.png - 384kB
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[*] posted on 8-2-2013 at 13:04


@ boffis: The two forms will be polymorphs
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[*] posted on 9-2-2013 at 23:22
Are many people using microscopes?


Quote: Originally posted by mayko  
A copper sulfate crystal that grew in one of my beakers. To the right, copper sulfate is combined with ammonium sulfate (white, far right) to form the ionic salt Cu(NH4)2(SO4)2 , a nice robin's egg blue. This is an example of a Tutton salt, with the general formula [M(II)][M(I)]2(SO4)2, where M are cations.

To the left, copper sulfate has been complexed with ammonia (far right). The ammonia ligands interact with the copper's d orbitals, causing the color to change to a deep indigo.

I think it's a neat illustration of the ionic compound being a 'dilution' of color whereas the covalent bonding alters the color.


Good use of a microscope in the lab. I am wondering, do many people find microscopes useful in the home lab? This seems like a great example of a good use (two pure crystals forming as the same time). Seems like it would be a reasonable investment as an analytic qualitative tool to identify crystal structure(?)




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