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Ruhi Patel Grade: 11
        

Nomenclature (word root ). Give some unbranched Chains and their names.

9 years ago

Answers : (1)

askIITIians Expert
21 Points
										

 

 

Word Root

 

            The word root represents the number of carbon atoms in the parent chain. For the chains upto four carbon atoms special word roots are used whereas for the chains containing more than four carbon atoms, Greek numerals (Table 1) are used. The word roots for different carbon chains are derived by leaving ‘ane’ from the name of carbon chain of respective molecule.

 

 Some unbranched Chains and their Names

Name

Number of Carbon Atoms

Structure

Methane

1

CH4

Ethane

2

CH3CH3

Propane

3

CH3CH2CH3

Butane

4

CH3(CH2)2CH3

Pentane

5

CH3(CH2)3CH3

Hexane

6

CH3(CH2)4CH3

Heptane

7

CH3(CH2)5CH3

Octane

8

CH3(CH2)6CH3

Nonane

9

CH3(CH2)7CH3

Decane

10

CH3(CH2)8CH3

Undecane

11

CH3(CH2)9CH3

Dodecane

12

CH3(CH2)10CH3

Tridecane

13

CH3(CH2)11CH3

Tetradecane

14

CH3(CH2)12CH3

Pentadecane

15

CH3(CH2)13CH3

Hexadecane

16

CH3(CH2)14CH3

Heptadecane

17

CH3(CH2)15CH3

Octadecane

18

CH3(CH2)16CH3

Nonadecane

19

CH3(CH2)17CH3

Eicosane

20

CH3(CH2)18CH3

Heneicosane

21

CH3(CH2)19CH3

Docosane

22

CH3(CH2)20CH3

Tricosane

23

CH3(CH2)21CH3

Triacontane

30

CH3(CH2)28CH3

Hentriacontane

31

CH3(CH2)29CH3

Tetracontane

40

CH3(CH2)38CH3

Pentacontane

50

CH3(CH2)48CH3

Hexacontane

60

CH3(CH2)58CH3

Heptacontane

70

CH3(CH2)68CH3

Octacontane

80

CH3(CH2)78CH3

Nonacontane

90

CH3(CH2)88CH3

Hectane

100

CH3(CH2)98CH3

 

            The word root of one carbon chain is obtained by leaving ane from methane i.e., meth–and similarly for others e.g.

 

                                    C1       Methane                    Meth-

                                    C2       Ethane                       Eth-

9 years ago
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