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

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The discussion focuses on the correct naming of a hydrocarbon as 3-Methyl-3-Propylheptane. The longest carbon chain identified has seven carbons, confirming the root name as heptane. The confusion arises from the presence of additional carbon chains, leading to a consideration of octane, but the longest continuous chain is prioritized. The correct numbering of substituents is emphasized, with the lowest numbers assigned to the substituents based on their position on the main chain. Ultimately, the naming convention adheres to IUPAC rules, confirming that 3-Methyl-3-Propylheptane is indeed the correct designation.
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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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