--%>
Assignment Help - homework help

Describe chemical properties of amines.

Like ammonia, primary, secondary and tertiary amines have a single pair of electrons on N atom. Hence chemical behavior of amines is similar to ammonia. Amines are basic in nature, and in most of the reactions they act as nucleophiles.

    
1. Reaction with acids

Amines react with aqueous solution of acids to form salts. These reactions hold the fundamental nature of amines.
203_amines2.png 

Salts of amine are typical ionic solids. They are non-volatile solids. On heating, these salts decompose before the melting point is reached. Amine salts are soluble in water while unsolvable in non-polar solvents. A water insoluble amine can be separated from non-basic compounds by its solubility in aqueous solutions of acids. From the aqueous solution, the amine can be regenerated by making it alkaline.
    
2. Reaction with metal ions

Lower aliphatic amines form coordination complexes with metal ions like Ag+ and Cu2+. For example, silver chloride dissolves in aqueous solution of ethylamine and copper sulphate forms a deep blue solution.
849_Amines3.png 

    
3. Reaction with alkyl halides (Alkylation)

Amines react with alkyl halides to form amines of higher class. In this reaction, the amine acts as nucleophile bringing about nucleophilic substitution of alkyl halide.
562_Amines4.png 

Since in this reaction hydrogen atoms attached to nitrogen in amines is referred to as alkylation of amines.
556_Amines5.png 

Aromatic amines also undergo similar reaction. For example, when aniline is treated with excess of methyl iodide under pressure, mixture of secondary, tertiary amines and quaternary salt are formed.

 

 

 

 

 

 

   Related Questions in Chemistry

  • Q : Problem on moles of solution The number

    The number of moles of a solute in its solution is 20 and total no. of moles are 80. The mole fraction of solute wil be: (a) 2.5 (b) 0.25 (c) 1 (d) 0.75

    		•
  • Q : Organic and inorganic chemistry Write

    Write down a short note on the differences between the organic and inorganic chemistry?

    		•
  • Q : Examples of reversible reaction

    Describe some examples of a reversible reaction?

    		•
  • Q : How to calculate solutions molar

    The contribution of an electrolyte, or an ion electrolyte, is reported as the molar of a conductance. The definition of the molar conductance is based on the following conductivity cell in which the electrodes are 1 m apart and of sufficient area that th

    		•
  • Q : Dipole attractions for london dispersion

    Illustrate how are dipole attractions London dispersion forces and hydrogen bonding similar?

    		•
  • Q : What is Flash Photolysis Reactions.

    An example illustrates the type of mechanism that can be written to explain the development of flash photolysis reactions. Often, as the reactions in the ozone layer of the earth's atmosphere, we are interested in the kinetic behavior of species that are not a

    		•
  • Q : Thermodynamics 1 Lab Report I already

    I already did Materials and Methods section. I uploaded it with the instructions. Also, make sure to see Concept Questions and Thinking Ahead in the instructions that I uploaded. deadline is tomorow at 8 am here is the link to download all instructions because I couldn't attach all of t

    		•
  • Q : Calculating total number of moles

    Choose the right answer from following. While 90 gm of water is mixed with 300 gm of acetic acid. The total number of moles will be: (a)5 (b)10 (c)15 (d)20

    		•
  • Q : Molecular weight of solute Select right

    Select right answer of the question. A dry air is passed through the solution, containing the 10 gm of solute and 90 gm of water and then it pass through pure water. There is the depression in weight of solution wt by 2.5 gm and in weight of pure solvent by 0.05 gm. C

    		•
  • Q : Ddd 4) The addition of S2- ion to

    4) The addition of S2- ion to Fe(OH)2(s). Explain why the addition of S2- ion to Cr(OH)3(s) does not result in the formation of Cr2S3(s).

    		•