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guaguanco
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| Quote: | Originally posted by Friedrich Wöhler
It should be able (I read) to add *CO*-group from urea on carbonyl-building metals such as nickel. |
I don't think so. Ni(CO)4 is produced by passing CO gas over powdered Ni, not from solutions of nickel ions. And urea is quite a polar molecule;
the carbonyl portion isn't going to easily fly off as a carbon monoxide molecule.
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Friedrich Wöhler
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| Quote: | | not from solutions of nickel ions |
Where did you read this...?? I have this not written.
But...I had that could write. Because of its correctly!
| Quote: | | Ni(CO)4 is produced by passing CO gas over powdered Ni, not from solutions of nickel ions |
False!
Generally there are different methods getting carbonyles in addition of that gas - metal-powder - reaction. For example:
~ CO under high pressure on Me-sulfides or Me-chlorides (Hieber-Method) (known carbonyles from minimal 12 metals.)
~ Cr(CO)6 Effect of CO at a etheric solution of CrCl3 under presence of Grignard-compounds
~ [Mn(CO)5]2 CO under pressure at activatet MnI2 in ether, catalysed by Mg
~ Ni(CO)5 already from shaking an alcalic suspension of fresh NiS2 with CO-gas
Get knowledge from chemistry books before contradict so strictly!
A good man erect only his cock - but never his finger... (Bin Laden's ugliest gesture) 
Kein Schwanz ist so hart wie das Leben.
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guaguanco
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You are correct, I did insufficient homework, you can use nickel ions.  I still
don't think you'll be able to use urea as a carbonyl source. 
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Polverone
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See <A HREF="http://www.sciencemadness.org/talk/viewthread.php?tid=1128">this thread</A>. The use of nickel and urea for
producing hydrazine has been patented, but the nickel is supposed to act catalytically, its carbonyl decomposing to again yield metallic nickel and
CO.
PGP Key and corresponding e-mail address
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guaguanco
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Well, my humiliation is well and truly complete.
My wife still likes me, anyway...
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Friedrich Wöhler
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| Quote: |
My wife still likes me, anyway... |
I know why: she didn't read this forum. 
Ok ok, don't make suicide, the life will continue! 
Kein Schwanz ist so hart wie das Leben.
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Axt
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What is the correct term for salts of nitrourea? Ive been using "nitrocarbamate" but now im not entirely sure??
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Theoretic
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I'd just say "nitrourate".
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Organikum
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Thats a old one but hey!
Polyethlene is a nice reducing agent. isn´t it`?
Melts better into the brew then charcoal.
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Jor
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urea
What real uses has urea , besides a good way of neutralizing NOx vapors?
I used UTFSE , but only came across organic synthesis and preparation of potassium/sodium cyanate (this one needs temperatures around 250C, wich is no
options as I only have a spiritus burner (altho I will get a propane/butane one later on))
I do not have a fumehood.
Edit by Chemoleo: You didn't search well enough. Merged with urea exploration thread.
[Edited on 3-2-2008 by chemoleo]
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solo
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You might start your research here ..........
http://en.wikipedia.org/wiki/Urea
.....then move on with some of the references given to get a deeper view of the compound.
http://webmineral.com/data/Urea.shtml
It's better to die on your feet, than live on your knees....Emiliano Zapata.
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YT2095
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| Quote: | Originally posted by Jor
preparation of potassium/sodium cyanate (this one needs temperatures around 250C, wich is no options as I only have a spiritus burner
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your Alcohol burner Should be quite capable of well over 3x this heat (250c).
\"In a world full of wonders mankind has managed to invent boredom\" - Death
Twinkies don\'t have a shelf life. They have a half-life! -Caine (a friend of mine)
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Velzee
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Quote: Originally posted by Polverone  |
I know it's rather silly of me to just start trying things when I could look them up, but I love the hands on parts of chemistry and I was
disconnected from the net at the time.
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I have the same situation going right now. I don't know what to do with all of this urea.
Check out the ScienceMadness Wiki: http://www.sciencemadness.org/smwiki/index.php/Main_Page
"All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."
—Arthur Schopenhauer
"¡Vivá Cristo Rey!"
—Saint José Sánchez del Río |
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