PSetAlkanes.doc

Chemistry 101 Short Alkane Problem Set Mrs. Freschl 1. Draw the structures for all the isomers of C7H16 and give their IUPAC names. (Hint: there are nine isomers) 2. Draw the structures and IUPAC names for the following compounds. isobutane _____________________ _________________________ structure IUPAC name isopentane _____________________ _________________________ structure IUPAC name neopentane _____________________ _________________________ structure IUPAC name 3. Draw the structure of 2,5-dimethyl-3-isopropyl-5-tert.butyl octane __________________________________________________ 4. Draw the structure of 3, 5-diethyl-5-sec.butyl nonane _______________________________________________ 5. What is the molecular formula for an alkane with 11 carbons? ____________ 6. What is the molecular formula for 2,2,3,3-tetramethylpentane? _____________ 7. Give the IUPAC name for each of the following. a) ________________________________________________________ b) _______________________________________________________ c) _________________________________________________________ d) ________________________________________________________ e) _________________________________________________________ 8. The following names are incorrect. What are the correct IUPAC names? a) 2-ethyl-4-methylpentane ________________________ b) 3-diethylhexane ____________________________ c) 5-methylheptane __________________________ Chemistry 101 Short Alkane Problem Set ANSWERS 1. Draw the structures for all the isomers of C7H16 and give their IUPAC names. heptane, 2-methylhexane, 3-methylhexane, 3-ethylpentane, 2,2-dimethylpentane, 2,3-dimethylpentane, 2,4-dimethylpentane, 3,3-dimethylpentane 2,2,3-trimethylbutane 2. Draw the structures and IUPAC names for the following compounds. isobutane 2-methylpropane isopentane 2-methylbutane neopentane 2,2-dimethylpropane 3. Draw the structure of 2,5-dimethyl-3-isopropyl-5-tert.butyl octane 4. Draw the structure of 3, 5-diethyl-5-sec.butyl nonane 5. What is the molecular formula for an alkane with 11 carbons? C11H24 6. What is the molecular formula for 2,2,3,3-tetramethylpentane? C9H20 7. Give the IUPAC name for each of the following. a) 3,3-dimethyl-5-propylnonane b) 3-methyl-4,6-diethyl-5-tert.butylnonane c) 3,7-dimethyl-5-ethyl-5-propyldecane d) 3-methyl-4,5-diethyloctane e) 2,6,6-trimethyl-4-tert.butyloctane 8. The following names are incorrect. What are the correct IUPAC names? a) 2-ethyl-4-methylpentane 2,4-dimethylhexane b) 3-diethylhexane 3,3-diethylhexane c) 5-methylheptane 3-methylheptane