EP ESSENTIAL ORG.CHEM.-MOD.MASTERING
3rd Edition
ISBN: 9780133858501
Author: Bruice
Publisher: PEARSON CO
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Chapter 16, Problem 35P
Interpretation Introduction
Interpretation:
The mechanism that accounts for the incorporation of the deuterium atoms into
Concept Introduction:
Fructose exists as either a free sugar or in polysaccharide forms. The minor tautomers of fructose are
Tautomers are the isomers which makes the difference in the position of protons.
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When d-fructose is dissolved in D2O and the solution is made basic, the d-fructose recovered from the solution has an average of 1.7 deuterium atomsattached to the C-1 carbon per molecule. Show the mechanism that accounts for the incorporation of these deuterium atoms into d-fructose.
Draw the mechanism for the formation of b-lactose from α-d-galactose and β-d-glucose in dilute HCl.
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Chapter 16 Solutions
EP ESSENTIAL ORG.CHEM.-MOD.MASTERING
Ch. 16.1 - Prob. 1PCh. 16.2 - Prob. 2PCh. 16.3 - Prob. 3PCh. 16.3 - Prob. 4PCh. 16.4 - Prob. 5PCh. 16.4 - Prob. 6PCh. 16.5 - Prob. 7PCh. 16.5 - Prob. 8PCh. 16.6 - Prob. 10PCh. 16.8 - Prob. 12P
Ch. 16.8 - Prob. 14PCh. 16.9 - Prob. 15PCh. 16.10 - Prob. 16PCh. 16.11 - Refer to Figure 16.4 to answer the following...Ch. 16 - Prob. 18PCh. 16 - Prob. 19PCh. 16 - Prob. 20PCh. 16 - Prob. 21PCh. 16 - Prob. 22PCh. 16 - Prob. 23PCh. 16 - Prob. 24PCh. 16 - Prob. 25PCh. 16 - Name the following compounds:Ch. 16 - Prob. 28PCh. 16 - Prob. 29PCh. 16 - Prob. 31PCh. 16 - Prob. 32PCh. 16 - Prob. 33PCh. 16 - Prob. 34PCh. 16 - Prob. 35PCh. 16 - Prob. 36PCh. 16 - Prob. 37PCh. 16 - Draw the mechanism for the acid-catalyzed...Ch. 16 - Prob. 39PCh. 16 - Prob. 40PCh. 16 - Prob. 41P
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- Draw the acid-catalysed mechanism whereby D-fructose cyclizes to α-D-fructofuranose.arrow_forwardIdentify which d-aldopentoses are C2 epimers. Identify which ones are C3 epimers.arrow_forwardChorismate mutase is an enzyme that promotes a pericyclic reaction by forcing the substrate to assume the conformation needed for the reaction. The product of the pericyclic reaction is prephenate that is subsequently converted into the amino acids phenylalanine and tyrosine. What kind of a pericyclic reaction does chorismate mutase catalyze?arrow_forward
- The enzyme that catalyzes the C-Cg bond cleavage reaction that converts serine to glycine removes the substituent (R) bonded to the a-carbon in the first step of the reaction. Starting with PLP bound to serine in an imine linkage, propose a mechanism for this reaction. (Hint: The first step involves removal of the proton from serine's OH group.)arrow_forwardChorismate mutase is an enzyme that promotes a pericyclic reaction by forcing the substrate to assume the conformation needed for the reaction. The product of the pericyclic reaction is prephenate that is subsequently converted into the amino acids phenylalanine and tyrosine. What kind of a pericyclic reaction does chorismate mutase catalyze?arrow_forwardThe C2-epimer of D-xylose is called (blank 1). The enediol rearrangementconverts an aldose into a (blank 2). The aldopentose embedded in RNA is(blank 3). An aldopentose would have (blank 4) possible stereoisomers,of whichBlankwould be D-sugars. An ketopentose would have (blank 4) possiblestereoisomers, of which (blank 5) would be D-sugarsarrow_forward
- can you please add an explanation.arrow_forwardFrom the choices given below select the L-aldopentose that yields an optically inactive alditol upon reduction with NaBH4. Select ALL monosaccharides that satisfy the requirement, excluding the structure referenced in the question. Note that only D structures are shown. To select an L structure click on the name. If no selection exists, then select the referenced structure. H H H CHO -OH -OH +OH CH₂OH D-Ribose L-Ribose HO- H H- CHO H OH -OH CH₂OH D-Arabinose L-Arabinose H HO H CHO OH -H -OH CH₂OH D-Xylose L-Xylose HO HO- H- CHO -H H -OH CH₂OH D-Lyxose L-Lyxosearrow_forwardCarbohydrates a. Compound Z is an aldopentose. If Z is oxidized with nitric acid the product is optically active. If Z undergoes one Ruff degradation and the product of that degradation is reduced to the alditol using H₂/Ni the resulting product is optically inactive. If compound Z undergoes two Ruff degradations, D-glyceraldehyde (shown below) is obtained. Draw the usual Fischer projection of Z (aldehyde at the top). (Hint: work backwards from D- glyceraldehyde.) H HIC OH CH₂OH D-Glyceraldehydearrow_forward
- Compound Z is an aldopentose. If Z is oxidized with nitric acid the product is optically active. If Z undergoes one Ruff degradation and the product of that degradation is reduced to the alditol using H2/Ni the resulting product is optically inactive. If compound Z undergoes two Ruff degradations, D-glyceraldehyde (shown below) is obtained. Draw the usual Fischer projection of Z (aldehyde at the top). (Hint: work backwards from D- glyceraldehyde.)arrow_forwardGive Detailed explanation Solutionarrow_forwardd-Altrose is an aldohexose. Ruff degradation of d-altrose gives the same aldopentose asdoes degradation of d-allose, the C3 epimer of glucose. Give the structure of d-altrosearrow_forward
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