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N,N-Diethylenthylamine
N, N-Diethylmethylamine (DEMA), also can be called diethylmethylamine, is an organic compound with formula C5H13N. It is an industrial chemical that is mainly used in desalination of brackish water or used as chemical inter-mediate and acid neutralizer. N, N-Diethylmethylamine is a clear colourless to pale yellow liquid at room temperature. It is a dangerous chemical is different statements it has difference notifications. At H225, it is highly flammable liquid and vapor; at H301, it is toxic if swallowed; at H302, it is harmful if swallowed; at H314, it can cause severe skin burns and eye damage; at H318, it can cause serious eye damage; at H332, it is harmful if inhaled.

Structure and conformation
Structure and conformation of diethylmethylamine can be investigated by using gas electron diffraction and vibrational spectroscopy.There were studies using IR and Raman spectra to test DEMA, and two of conformers were detected in the solid phase, which was tt and g+t. However, the author can only sure there are two or more conformers in gas phase, but they cannot assigned which the conformers are. From the diffraction data, we get the conformation of DEMA which is 35(14)% tt + 27(14)% g+t + 20(17)% g−t + 18(23)% g+g+, and tt conformer is the most stable one among them. This value is smaller than the value of one conformer compound. This shows there are four conformers exists and normal-coordinate analysis prove the results. From the vibrational analysis results, four conformers can be identified. The results also shows tt and g+t conformers are more stable than the other two. The journal also contrast diethylamine and DEMA, it find out that the important factor to determine the conformational stability of DEMA is the steric interaction between C6-methyl and ethyl groups. Further analysis shows g-g+ conformer was not found in any compound in the experiment. This is because the steric repulsion between terminal methyl group in this conformation.

Usage of N,N-Diethylmethylamine
N,N-diethylmethylamine is a industrial chemical which can be used in several different ways.