--%>
Assignment Help - homework help

What are aliphatic amines and its nomenclature?

In common system, the aliphatic amines are named by using prefix for alkyl group followed by the word amine.

In case of mixed amines, the name of alkyl groups are arranged in alphabetical order. This is followed by the word amine. However, for simple secondary or tertiary amines another prefix di or tri is added before the name of the alkyl group.

There is yet another system of naming amines according to which they are called aminoalkanes. In this system, the secondary or tertiary amines are named as N-alkylaminoalkanes. In this case, the smaller alkyl groups are taken as subsequent on nitrogen atom of primary amine. For example,

1264_aliphatic amines.png  

In IUPAC system, the amines are considered to be amino derivatives of corresponding alkanes. Therefore, they are called alkanamines. These names are obtained by replacing e from the name of the parent alkane with suffix amine. The secondary and tertiary amines are, however, named as N-substituted derivatives of largest group of primary amines, i.e. N-Alkylalkanamines. The common and IUPAC names of some simple amines are given below in tabular form.

Amine Common Name IUPAC Name
1° Amines    
CH3NH3 Methyl amine Methanamine
CH3CH2NH2 Ethyl amine Ethanamine
CH3CH2CH2NH2 n-Propyl amine Propan-1-amine
(CH3)2CHNH2 Iso-Propyl amine Propan-2-amine
2° Amines    
CH3 - NH - CH3 Dimethyl amine N-Methyl-methanamine
CH3 - NH - C2H5 Ethyl methyl amine N-Methyl-ethanamine
3° Amines    
1097_aliphatic amines1.png Tri-methyl amine N, N-Dimethyl-methanamine
1944_aliphatic amines2.png Ethyl methyl amine N-Ethyl-N-methyl-propanamine
    
For compounds containing more than one amino group, a prefix di, tri, etc. is added before the suffix amine and the terminal e of the name of the hydrocarbon part is retained.

1616_aliphatic amines3.png  

 

 

 

 

 

   Related Questions in Chemistry

  • Q : Question based on lowering of vapour

    Choose the right answer from following. The relative lowering of vapour pressure produced by dissolving 71.5 g of a substance in 1000 g of water is 0.00713. The molecular weight of the substance will be:  (a) 18.0 (b) 342 (c) 60 (d) 180

    		•
  • Q : Why acetic has less conductivity than

    Illustrate the reason, why acetic has less conductivity than Hcl?

    		•
  • Q : Entropy on molecular basis. The

    The equation S = k in W relates entropy to W, a measure of the number of different molecular level arrangements of the system.In the preceding developments it was unnecessary to attempt to reach any "explana

    		•
  • Q : Problem based on mole concept Choose

    Choose the right answer from following. An aqueous solution of glucose is 10% in strength. The volume in which mole of it is dissolved will be : (a) 18 litre (b) 9 litre (c) 0.9 litre (d) 1.8 litre

    		•
  • Q : Molarity of Nacl solution When 5.85 g

    When 5.85 g of NaCl (having molecular weight 58.5) is dissolved in water and the solution is prepared to 0.5 litres, the molarity of the solution is: (i) 0.2 (ii) 0.4 (iii) 1.0 (iv) 0.1

    		•
  • Q : Chemists have not created a periodic

    Explain the reason behind that the chemists have not created a periodic table of compounds?

    		•
  • Q : Vapour pressure of the pure hydrocarbons

    Give me answer of this question. A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressure of the pure hydrocarbons at 20°C are 440 mmHg for pentane and 120 mmHg for hexane. The mole fraction of pentane in the vapour phase would be: (a) 0.549 (b)

    		•
  • Q : Molal concentration Select the right

    Select the right answer of the question. If one mole of any substance is present in of solvent, then: (a) It shows molar concentration (b) It shows molal concentration (c) It shows normality (d) It shows strength.

    		•
  • Q : Describe Thermodynamics Properties The

    The free energy property leads to convenient expressions for the volume and pressure dependence of internal energy, enthalpy and the heat capacities.All the properties of a chemical system, a sample of a substance, or a mixture of substances have some fixe

    		•
  • Q : Problem on reversible process a. For a

    a. For a reversible process involving ideal gases in a closed system, Illustrate thatΔS = Cv ln(T2/T1) for a constant volume process ΔS = Cp ln(T2/T1) for a constant pressu

    		•