General, Organic, and Biological Chemistry - 4th edition
4th Edition
ISBN: 9781259883989
Author: by Janice Smith
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 20.1, Problem 20.1P
Label the hemiacetal carbon−the carbon bonded to one OH and one OR group−in lactose (Section 6.8). Label all other hydroxyls as 1°, 2°, or 3°.
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Maltose is a carbohydrate present in malt, the liquid obtained from barley and other grains. Although maltose has numerous functional groups, its reactions are explained by the same principles we have already encountered.a. Label the acetal and hemiacetal carbons.b. What products are formed when maltose is treated with each of these reagents: [1] H3O+; [2] CH3OH and HCl; [3] excess NaH, then excess CH3I?c. Draw the products formed when the compound formed in Reaction [3] of part (b) is treated with aqueous acid.The reactions in parts (b) and (c) are used to determine structural features of carbohydrates like maltose.
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Chapter 20 Solutions
General, Organic, and Biological Chemistry - 4th edition
Ch. 20.1 - Label the hemiacetal carbonthe carbon bonded to...Ch. 20.2 - Prob. 20.1PPCh. 20.2 - Prob. 20.2PCh. 20.2 - Prob. 20.3PCh. 20.2 - Prob. 20.4PCh. 20.2 - Prob. 20.5PCh. 20.2 - Prob. 20.2PPCh. 20.2 - Prob. 20.6PCh. 20.2 - Prob. 20.7PCh. 20.3 - Prob. 20.8P
Ch. 20.3 - Prob. 20.3PPCh. 20.3 - Prob. 20.4PPCh. 20.4 - Prob. 20.5PPCh. 20.4 - Prob. 20.6PPCh. 20.4 - Prob. 20.9PCh. 20.4 - Prob. 20.10PCh. 20.5 - Prob. 20.7PPCh. 20.5 - Prob. 20.8PPCh. 20.5 - Lactose contains both an acetal and a hemiacetal....Ch. 20.5 - Prob. 20.12PCh. 20.5 - Prob. 20.13PCh. 20.5 - Prob. 20.14PCh. 20.5 - Prob. 20.15PCh. 20.6 - Prob. 20.16PCh. 20.6 - Prob. 20.17PCh. 20.7 - Prob. 20.18PCh. 20.7 - Prob. 20.19PCh. 20.8 - Prob. 20.20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27PCh. 20 - Prob. 28PCh. 20 - Prob. 29PCh. 20 - Prob. 30PCh. 20 - Prob. 31PCh. 20 - Prob. 32PCh. 20 - Prob. 33PCh. 20 - Prob. 34PCh. 20 - Prob. 35PCh. 20 - Prob. 36PCh. 20 - Prob. 37PCh. 20 - Prob. 38PCh. 20 - Prob. 39PCh. 20 - Prob. 40PCh. 20 - Prob. 41PCh. 20 - Prob. 42PCh. 20 - Prob. 43PCh. 20 - Prob. 44PCh. 20 - Prob. 45PCh. 20 - Prob. 46PCh. 20 - What product is formed when each compound is...Ch. 20 - What product is formed when each compound is...Ch. 20 - Prob. 49PCh. 20 - Prob. 50PCh. 20 - Prob. 51PCh. 20 - Prob. 52PCh. 20 - Prob. 53PCh. 20 - Prob. 54PCh. 20 - Prob. 55PCh. 20 - Prob. 56PCh. 20 - Prob. 57PCh. 20 - Prob. 58PCh. 20 - Prob. 59PCh. 20 - Prob. 60PCh. 20 - Prob. 61PCh. 20 - Prob. 62PCh. 20 - Prob. 63PCh. 20 - Prob. 64PCh. 20 - Prob. 65PCh. 20 - Prob. 66PCh. 20 - Prob. 67PCh. 20 - Prob. 68PCh. 20 - Prob. 69PCh. 20 - Prob. 70PCh. 20 - Prob. 71PCh. 20 - Prob. 72PCh. 20 - Prob. 73PCh. 20 - Prob. 74PCh. 20 - Prob. 75PCh. 20 - Prob. 76PCh. 20 - Prob. 77PCh. 20 - Prob. 78PCh. 20 - Prob. 79CPCh. 20 - Prob. 80CP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Give the IUPAC name (including any E,Z designation) for each unsaturated aldehyde. Neral is obtained from lemon grass, and cucumber aldehyde (Problem 1.30) contributes to the aroma of a fresh mango.arrow_forwardMaltose is a carbohydrate present in malt, the liquid obtained from barleyand other grains. Although maltose has numerous functional groups, itsreactions are explained by the same principles we have alreadyencountered. Label the acetal and hemiacetal carbons.arrow_forward5 Classify each OH group and halogen in dexamethasone, a synthetic steroid, as 1°, 2°, or 3°. HO H H done OH ...OH dexamethasone •• |||arrow_forward
- Thiols have lower boiling points and are less water soluble than the corresponding alcohol e.g., CH3CH2OH and CH3CH2SH. Explain why.arrow_forward2. Draw in the space below the acetal formed in the following reaction. (include all products) CH,-CH,-C-H → acetal: 2 CH3-OHarrow_forward1) identify the reactant/s in the chemical equation and circle it, also name its major functional group 2) identify the product/s in the chemical equation (circle it) and name its functional group 3) is the a reversible reaction or not? How do we knowarrow_forward
- Label each pair of compounds as keto–enol tautomers or constitutional isomers, but not tautomers.arrow_forwardIdentify the alcohol reactant needed to produce each of the following compounds as the major product of an alcohol dehydration reaction. H,SO, Alcohol → CH3–CH=CH–CH3 180°C a. H,SO, Alcohol → CH,=CH-CH–CH3 180°C CH3 b. H,SO, Alcohol CH3-CH-CH2–0–CH,-CH–CH3 140°C ČH3 с. H,SO, Alcohol CH,=CH-CH,–CH3 180°C H,SO, Alcohol CH;-C=C-CH3 180°C CH3 CH3 e.arrow_forwardWhy CH3CH2NHCH3 has higher boiling point tha (CH3)3N even they have the same molecular weightarrow_forward
- Give the IUPAC name for each sulde.arrow_forward(a) Draw two different enol tautomers of 2-methylcyclohexanone. (b) Draw two constitutional isomers that are not tautomers, but contain a C=C and an OH group. 2-methylcyclohexanonearrow_forwardDexamethasone is a halogen-containing steroid used to treat infl ammation in rheumatoid arthritis and other conditions. (a) Classify the alkyl halide in dexamethasone as 1 °, 2 °, or 3 °. (b) Classify the hydroxyl groups as 1 °, 2 °, or 3 °.arrow_forward
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