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15.5.13: Chapter 12

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    482466
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    Problem 12-2
    (a) 2-Methyl-2-pentene
    (b) 2-Hexene
    Problem 12-3
    (a) 43, 71
    (b) 82
    (c) 58
    (d) 86
    Problem 12-4 102 (M+), 84 (dehydration), 87 (alpha cleavage), 59 (alpha cleavage)
    Problem 12-5 X-ray energy is higher; λ = 9.0 × 10−6 m is higher in energy.
    Problem 12-6
    (a) 2.4 × 106 kJ/mol]
    (b) 4.0 × 104 kJ/mol
    (c) 2.4 × 103 kJ/mol
    (d) 2.8 × 102 kJ/mol
    (e) 6.0 kJ/mol
    (f) 4.0 × 10−2 kJ/mol
    Problem 12-7
    (a) Ketone or aldehyde
    (b) Nitro compound
    (c) Carboxylic acid
    Problem 12-8
    (a) CH3CH2OH has an  −OH absorption.
    (b) 1-Hexene has a double-bond absorption.
    (c) CH3CH2CO2H has a very broad  −OH absorption.
    Problem 12-9 1450–1600 cm−1: aromatic ring; 2100 cm−1: C C; 3300 cm−1: C C−H
    Problem 12-10
    (a) 1715, 1640, 1250 cm−1
    (b) 1730, 2100, 3300 cm−1
    (c) 1720, 2500–3100, 3400–3650 cm−1
    Problem 12-11 1690, 1650, 2230 cm−1

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