Sciencemadness Discussion Board
Not logged in [Login - Register]
Go To Bottom

Printable Version  
 Pages:  1  ..  3    5
Author: Subject: help with mechanisms
myristicinaldehyde
Hazard to Others
***




Posts: 163
Registered: 23-4-2016
Location: .͐͌ ͛҉̻̫̰̻̖E̮ͮ̐́̚ ̢̗̅̉ͩ͂̒̌.̯̻̺̯̀̎͂̄ͩ̚
Member Is Offline

Mood: сорок пять

[*] posted on 2-3-2017 at 16:45


The simplest answer is that LAH is used strictly in anhydrous conditions, and reacts aggressively with any water that would form. Hydrolysis requires water. Ergo, LAH does not produce the hydrolyzed product.



If we don't study the mistakes of the future we're doomed to repeat them for the first time.
View user's profile View All Posts By User
sulfuric acid is the king
Hazard to Self
**




Posts: 78
Registered: 11-1-2017
Member Is Offline

Mood: Organophosphorus

[*] posted on 3-3-2017 at 17:55


What are differences of both methodes?I am still learning,i am interested in details...
View user's profile View All Posts By User
wg48
International Hazard
*****




Posts: 659
Registered: 21-11-2015
Member Is Offline

Mood: No Mood

[*] posted on 26-11-2017 at 06:38


Below is a procedure for making an azobenzene that I am not familar with. Can anyone give me a name for the reaction or describe the mechanism.

Procedure, 4-nitrobenzoic acid (2.0 g, 12 mmol) and NaOH (5.75 g, 144 mmol) were mixed in 30 mL of water and heated until the solid dissolved. Glucose (13.0 g, 72 mmol) aqueous solution (20 mL) was added drop wise at 70C, initially yielding a yellow precipitate and subsequently a brown solution upon further addition of glucose. A stream of air was bubbled into the mixture overnight, resulting in a light brown precipitate, and then the precipitate was filtered. The cake was dissolved in 10 mL of water, and acetic acid was used to adjust the pH of the solution in the range of 5 to 6. Approximately 1.06g azobenzene-4,4 dicarboxylic acid as light pink powder was obtained by filtration, washed with 25 mL of distilled water, and dried to constant weight in an oven at 80C

aaexperiment.jpg - 9kB

I found this note Attachment: aaaaglurednitro.pdf (286kB)
This file has been downloaded 85 times
View user's profile View All Posts By User
TGSpecialist1
Harmless
*




Posts: 6
Registered: 24-12-2017
Member Is Offline

Mood: always tired

[*] posted on 5-3-2018 at 22:37


What is the mechanism of decarboxylation by molten NaOH/KOH?
For benzoate I think it's like in picture, but I'm not sure how it works for saturated carboxylate salts.

de.jpg - 20kB
View user's profile View All Posts By User
TGSpecialist1
Harmless
*




Posts: 6
Registered: 24-12-2017
Member Is Offline

Mood: always tired

[*] posted on 5-3-2018 at 22:55


re:sulfuric acid is king
I'm sure that your nitroalkene can be directly be reduced to sec-butylamine with aluminium amalgam, since P2P + nitromethane + Al(Hg) reaction works to produce methamphetamine: https://erowid.org/archive/rhodium/chemistry/ritter-alhg.htm...
Nitroalkenes are prone to hydrolysis so the reaction has to be done in methanol or the product will be contaminated with 3-aminobutan-2-ol.
View user's profile View All Posts By User
 Pages:  1  ..  3    5

  Go To Top