- The name "2-Methyl butane" is incorrect. The longest continuous carbon chain has 4 carbons, making it a butane. However, the methyl group is on carbon 2, which is correct. The correct IUPAC name is 2-methylbutane (lowercase 'm' and no space).
- The name "2,2,4-Trimethyl pentane" is incorrect. The longest continuous carbon chain has 5 carbons, making it a pentane. The methyl groups are on carbons 2, 2, and 4, which is correct. The correct IUPAC name is 2,2,4-trimethylpentane (lowercase 't' and no space).
- The name "2,3,5-Trimethyl hexane" is incorrect. The longest continuous carbon chain has 6 carbons, making it a hexane. The methyl groups are on carbons 2, 3, and 5, which is correct. The correct IUPAC name is 2,3,5-trimethylhexane (lowercase 't' and no space).
- The name for the fourth structure is missing. The longest continuous carbon chain has 10 carbons, making it a decane. There are methyl groups on carbons 2, 6, and 7. The correct IUPAC name is 2,6,7-trimethyldecane.
Parent Tip: Review the logic above to help your child master the concept of hydrocarbon nomenclature worksheet.
