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Ruhi Patel Grade: 11
        

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

8 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-


8 years ago
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