Consider the molecule representation below. What is the systematic name of that molecule?
Could it possibly be 3,4-hex-2,6-anebenzene?
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Napthalene (also accepted by IUPAC as per 1993 recommendations)
IUPAC Name: (refer numbering in figure)
Bicyclo[4.4.0]deca-1,3,5,7,9-pentaene or Bicyclo[4.4.0]deca-2,4,6,8,10-pentaene
For a general guideline:
The generic name for compounds such as this is
where x, y, and z are the numbers of intervening carbons on the three paths between the two bridgehead carbons cited in decreasing numerical order, and alk refers to the total number of carbons in the ring systems.
As @ron already said in his comment, the systematic name of the naphtalene is Bicyclo[4.4.0]deca-1,3,5,7,9-pentaene or Bicyclo[4.4.0]deca-2,4,6,8,10-pentaene since you can start the carbon numerotation from 2 chemically equivalent carbon.