Why Is the Correct Name 3-Methyl-3-Propylheptane?

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SUMMARY

The correct name for the compound is 3-Methyl-3-Propylheptane, derived from a seven-carbon heptane backbone with two substituents: a methyl group and a propyl group. The longest carbon chain is determined to be heptane due to the presence of seven carbons connected by single bonds. The naming follows IUPAC conventions, prioritizing the longest chain and the lowest possible numbers for substituents. The confusion regarding octane arises from misinterpreting the longest chain, which does not always equate to the longest straight line.

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toothpaste666
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Homework Statement


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The Attempt at a Solution


The answer is supposedly C but I can't figure out why its not E.
first I count the number of C in the longest chain. There are 7 C and there are only single bonds so the the root and suffix is heptane. there is a chain with one C (methyl) and one with 3 C (propyl) and they are both attached the the third carbon counting from the side that gives the smallest numbers. listing in alphabetical order the name should be 3-methyl-3-propylheptane
 
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You have to select the longest chain. Which number is higher 7, or 8?
 
I am confused. To me it seems that there are 3 chains, one with 7, one with 3 and one with 1 carbons
 
E can't be right as it calls for HEPTane, when there is a possible OCTane chain.
 
forgive me if it is obvious but I don't see where the octane chain could be
 
"Longest chain" doesn't necessarily mean longest straight line.
 
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Start from the leftmost carbon, turn right (down) at the ternary carbon.
 
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ahh i get it now. thanks guys
 

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