1. Suppose I told you that I was working with a chemical called 3-methylbutane.

Question

1. Suppose I told you that I was working with a chemical called 3-methylbutane. However, you are highly skilled at naming organic compounds and you tell me that 3-methylbutane is actually an incorrect IUPAC name. What is the correct IUPAC name for 3-methylbutane? Hint...it may help to draw the skeletal or condensed structure for 3-methylbutane.

2. Suppose that I told you that I was working with a chemical called 1-methylbutane. However, you are highly skilled at naming organic compounds and you tell me that 1-methylbutane is actually an incorrect IUPAC name. What is the correct IUPAC name for 1-methylbutane? Hint...it may help to draw the skeletal or condensed structure for 1-methylbutane.

Explanation / Answer

1)2-methyl butane

REASON: you start numbering from the end where the addittional group comes first

2)pentane

REASON: all the carbon atoms are in same line so no additional group is atached to chain

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