Nitrogen of amines

Nitrogen of amines, on the other hand, is quite a good nucleophile pro-... 

The fact of producing stable FS of nanocomposite on PEPA basis and increasing the operational characteristies of epoxy polymer was ascertained. It was demonstrated that the introduction of Cu/C nanocomposite into PEPA facilitates the formation of coordination bonds with nitrogen of amine groups, thus resulting in PEPA activity increase in ER hardening reactions. It was found out that the optimal time period of ultrasound processing of copper/carbon nanocomposite FS is 20 min. 

Csrbon, hydrogen, and oxygen are the three most common elements in organic compounds. Because of the wide distribution of amines in the biological world, nitrogen is the fourth most common element in organic compounds. The lone pair of electrons on the nitrogen of amines is a powerful electron source, so the most important chemical properties of amines are their basicity and nucleophilicity. 

The presence of methylamine on quartz (lOl 1 stabilized the surface more as compared with those in the presence of water and methanoic acid (Table 3.4). The adsorption energy for an amine molecule was more negative than for water and methanoic acid (Table 3.5), indicating that in an equilibrium condition methylamine will adsorb preferentially on this surface by displacing water and methanoic acid molecules. Methylamine adsorption did not induce any noticeable surface reconstruction. Nitrogen of amine oriented itself at the bump distance (2.52 A with 70% of the sum of covalent radii) from the three-coordinated surface silicon, and the methyl group of the amine molecule was located away from the surface (Figure 3.10a). 

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