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what is the name of this alkane?


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Looking for the longest chain, we start with the methyl on the top right corner. When we get to the CH, it does not make a difference which way we continue counting because we end up with the same answer. The longest chain is 6 carbons so we have hexane as the parent chain.

We also have a substituent on carbon number three. We get the same answer if we count from either side of the parent chain. The substituent in question is two carbons long which is ethane but since it is a substituent we change the ane to yl to get ethyl.

The final answer is 3-ethylhexane.

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