--%>
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 : Molarity of cane sugar solution 171 g

    171 g of cane sugar (C12H22O11)  is dissolved in one litre of water. Find the molarity of the solution: (i) 2.0 M (ii) 1.0 M (iii) 0.5 M (iv) 0.25 M Choose the right answer from above.

    		•
  • Q : Haloalkane how haloalkane can be

    how haloalkane can be prepared by refluxing alcohol with hydrohalic acids

    		•
  • Q : Group Cations Explain how dissolving

    Explain how dissolving the Group IV carbonate precipitate with 6M CH3COOH, followed by the addition of extra acetic acid, establishes a buffer with a pH of approximately

    		•
  • Q : State octet rule in chemistry Explain

    Explain what is octet rule in chemistry?

    		•
  • Q : Schrodinger equation with particle in a

    Three dimensional applications of the Schrodinger equation are introduced by the particle-in-a-box problem.So far only a one-dimensional problem has been solved by application of the Schrodinger equation. Now the allowed energies and the probability functi

    		•
  • Q : Finding Normality Can someone please

    Can someone please help me in getting through this problem. Concentrated H2SO4 has a density of 1.98 gm/ml and is 98% H2SO4 by weight. The normality is: (a) 2 N  (b) 19.8 N  (c) 39.6 N  (d) 98

    		•
  • Q : Problem on relative humidity Relative

    Relative humidity is the ratio of the partial pressure of water in air to the partial pressure of water in air saturated with water at the same temperature, stated as a percentage: Relative  =

    Q : What is electrolysis? Explain with

    Passage of a current through a solution can produce an electrolysis reaction.Much additional information on the properties of the ions in an aqueous solution can be obtained from studies of the passage of a direct current (dc) through a cell containing a s

    		•
  • Q : Problem on equilibrium constant Ethanol

    Ethanol is manufactured from carbon monoxide and hydrogen at 600 K and 20 bars according to the reaction2 C0(g) + 4 H2(g) ↔ C2H5OH(g) + H2O (g)The feed stream contains 60 mol% H2, 20 m

    		•
  • Q : Normality of acetic acid Give me answer

    Give me answer of this question. The normality of 10% (weight/volume) acetic acid is: (a)1 N (b)10 N (c)1.7 N (d) 0.83 N

    		•