Nomencluture of Alkanes

1) Locate the longest contineous chain of carbon . This chain is called the parent chain. 

2) Number the longest chain begining from the end of the chain nearer the substituent. 

3) Use the number obtained by the application of rule 2 to designate the location of the substituent groups.

4) When two or more substituent are present , give each substituent a number crossponding to its location on the longest chain. 

5) When two substituent are present on the same carbon atom , use that a number twice.

 6) When two or more substituent are identical , indicate this by the use of prefixes di, tri , tetra and so on. 

7) When two chains of equal length complete for selection as the parent chain, choose the chain with the greater number of substituents.

8) When branhing first occurs at an equal distance from either end of the longest chain choose the name that gives the lower number at first point of difference.