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 1 
 on: Today at 01:44:34 PM 
Started by peterschmidt3943 - Last post by peterschmidt3943
Hello guys,

I have to find a formula for following:

Fe(SCN)3 + NaH2PO4 -><- ...

now, I dont want to have the solution per se, I just want to know how I can find out a formula in general..

 2 
 on: Today at 10:00:41 AM 
Started by Mimic - Last post by Mimic
No, but the reaction was accompanied by heat development and the formation of a very intense red color

 3 
 on: Today at 09:46:19 AM 
Started by Mimic - Last post by wildfyr
Concentrated sulfuric acid is so reactive that its a little generous to call it a solvent. What reactions do you know that involve concentrated sulfuric acid?

PS. Did you heat the solution?

 4 
 on: Today at 09:35:28 AM 
Started by chinmoy - Last post by Babcock_Hall
Can you use them to write an alternate resonance structure for one of the carbocations?

 5 
 on: Today at 09:23:37 AM 
Started by Mimic - Last post by Mimic
I looked in all the texts but I did not find anything could help me  ??? no mention of the reactions between the listed solvents and aldehydes

 6 
 on: Today at 09:06:06 AM 
Started by SteveE - Last post by SteveE
I am assuming that acidifying sodium or potassium fluoride with HCL acid will produce HFL acid. What would be needed to produce one liter? And what strength HFL would this produce?

Thanks

 7 
 on: Today at 07:55:38 AM 
Started by Sonic Hedgehog - Last post by wildfyr
@kriggy I found this (http://onlinelibrary.wiley.com/doi/10.1002/047084289X.rb381.pub2/abstract)

tert-Butyldimethylsilyl Trifluoromethanesulfonate

Quote
"(highly reactive silylating agent and Lewis acid capable of converting primary, secondary, and tertiary alcohols1b to the corresponding TBDMS ethers, and converting ketones2 and lactones2a,3 into their enol silyl ethers;...

Handling, Storage, and Precautions: the material should be stored under argon at 0 °C. The compound has an unpleasant odor and reacts rapidly with water and other protic solvents.

 8 
 on: Today at 07:52:28 AM 
Started by Mimic - Last post by wildfyr
What do you think? We are happy to help, but you have to give it a real shot yourself first per our forum rules (red link at the top of the page).

 9 
 on: Today at 07:50:54 AM 
Started by Sonic Hedgehog - Last post by wildfyr
You can use a significant overequivalence to make sure there are no mono-substituted ones. For MS, some leftover silyl ether dimer won't matter. Or its easy enough to get off with a silica plug like I mention in the reddit post.

I've never heard of protecting sulfonates with TBDMS, but I feel like it would be very hydrolyzable and fall apart during aqueous workup or in the LC, unlike the protected alcohols. I also had this PM exchange with OP that I would like to post here because it contains important info

Quote
Hey mate, I just had a few more questions I was hoping you could help me with regarding the TBDMS reaction.

You mentioned that you need an aprotic solvent- my alcohol is actually in human plasma (which obviously contains water), do you think I would have to remove the water?
Sorry with all the questions, I'm not a chemist haha.
I appreciate your help :)

All the best,

S


Quote
Yeah, you definitely would need to totally dry it out. Freeze drying would probably work best.

So its just your molecule in a solution of various salts right? Few to no other organic molecules in it?

PS This sort of discussion is still well suited for doing on your post. We want information disseminated as widely as possible.
-wildfyr

 10 
 on: Today at 07:48:40 AM 
Started by Mimic - Last post by Mimic
During the solubility test in the Organic Chemistry laboratory, I tested the one of parabromobenzaldehyde. In water, it is insoluble because the preponderant part of the molecule is lipophilic, and furthermore it is not soluble in 10% NaOH nor in 10% HCl. The only solvent in which it is soluble was the 96% sulfuric acid. Can you explain the reasons for the non-solubility in NaOH and HCl, and the reactions that occur with sulfuric acid?

Thanks in advance

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