Acetaldehyde ammonia trimer

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Acetaldehyde ammonia trimer
Acetaldehyde ammonia trimer.svg
IUPAC name
Other names
Acetaldehyde ammonia trimer
3D model (JSmol)
ECHA InfoCard 100.201.766
Molar mass 129.21 g·mol−1
Appearance Colorless crystals
Melting point 95 to 97 °C (203 to 207 °F; 368 to 370 K)
Solubility polar organic solvents
R-phrases (outdated) R36/37/38
S-phrases (outdated) 26
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is ☑Y☒N ?)
Infobox references

Acetaldehyde ammonia trimer is a chemical compound described by the formula (CH3CHNH)3. The pure material is colourless but samples often appear light yellow or slightly beige due to the degradation by oxidation. It is hygroscopic, and can be found in a trihydrate form.

As implied by its name, it is a trimeric species formed from the reaction of acetaldehyde and ammonia:

3 CH3CHO + 3 NH3 → (CH3CHNH)3 + 3 H2O

Studies using NMR spectroscopy indicate that the three methyl groups are equatorial, thus the molecule has C3v point group symmetry.[1]

The compound is related to hexamethylenetetramine, which is the condensation product of the condensation of ammonia and formaldehyde.


  1. ^ Nielsen, A. T.; Atkins, R. L.; Moore, D. W.; Scott, R.; Mallory, D.; LaBerge, J. M. (1973). "Structure and Chemistry of the Aldehyde Ammonias. 1-Amino-1-alkanols, 2,4,6-Trialkyl-1,3,5-hexahydrotriazines, and N,N-Dialkylidene-1,1-Diaminoalkanes". Journal of Organic Chemistry. 38 (19): 3288–3295. doi:10.1021/jo00959a010.

External links[edit]