1 per hift tab caps lack Check the box under each aldohexose. If there are none, check the None of the above box under the table. CH₂OH CH₂OH H CH₂OH о C= C=O C=0 C=0 H OH HO -H HO H H H- OH HO H H HD OH HO H I OH HO CH₂OH C=O OH HO OH H -OH HO H HO -H HO H H OH H H OH OH க CH₂OH CH₂OH CH₂OH CH₂OH CH₂OH o None of the above. 0 о 0 0 Explanation Check N alt W S ய X C P LL a A ✓ B
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- N-NHPH CHO CH2OH H- C=N-NHPH Но- -H- 3 equiv Но- -H- 3 equiv Но- PHNHNH2 PHNHNH, H- H- OH H- -O- H- H- -HO- H- -HO- ČH2OH ČH2OH ČH2OH D-glucose osazone D-fructose + NH3 + PHNH2 + 2 H20 The final step in the formation of the osazone from glucose is the reaction of the keto imine with 2 equivalents of phenylhydrazine to yield the osazone plus ammonia. This reaction involves the following intermediate steps: 1. Addition of phenylhydrazine to the imine and proton transfer to yield intermediate 1; 2. Elimination of ammonia to yield phenylhydrazone 2; 3. Addition of phenylhydrazine to the ketone to yield tetrahedral intermediate 3; 4. Proton transfer yields carbinolamine 4; 5. Elimination of water yields the final product osazone. Write out the mechanism on a separate sh of paper and then draw the structure of tetrahedral intermediate 3. NH НО- -H H- -ОН H- -ОН ОН Glucose keto imine Previous Nem) Which pyranose ring (A, B, C, or D) in the tetrasaccharide below is derived from D-altrose? The Fischer projections for the four aldohexoses that make up this tetrasaccharide are shown below. B C D HOH CHO CHO CHO CHO HO+H HTOH Fонно н HOH HOH H-OH H-OH H-+-OH H-TOHHOH HOH H+OH HOHнтон нон CHOH CHOH CHOH CHOH De D-glue Dalose Datrone i NH Į HOH STEP 1 OH, HO- answer 1. Just add arrows and charges for steps 1, 2, and 3 in formation of this enamine з no arrows needed here OH н Н ЮН -OH STEP 3 :ÖH н H STEP 2 на это про за почName the monosaccharides in the images by placing the appropriate terms. HO- H OH |- |-galacto 000 Incorrect CH₂OH OH 00000 CH₂OH aldopentose aldotetrose ketotetrose aldotriose Oketopentose Oketotriose fructose CHO -H -OH O OH aldohexose Oketopentose Ⓒaldotetrose OH aldopentose ketohexose OHT B furanose OH 0- --gluco CH,OH Answer Bank D Classify each monosaccharide according to the position of the carbonyi group and the number of cards the molecule. L OH pyranose OH 00000 CH₂OH OLI Incorrect OIL OH ketohexose aldohexose ketotetrose aldopentose Oaldotetrose ketopentose a OH CH₂OH OH O HO OH -fructo CH₂OH CS CamScanner
- What is the name of the sugar shown here? HO OH OL-xylose O D-xylose O D-erythrose OL-erythrose O D-threose O L-threose Oll.Which disaccharide contains an a(1-4) glycosidic bond? CH,OH CH2OH CH,OH CH2OH он OH OH OH он OH он ÓH он Он CH,OH CH,OH CH,OHO CH,OH CH,OH, CH;OHO. OH он, он он CH,OH Он OH ÓHDraw the a-anomer of the following monosaccharide. CHO HO H H- OH H -OH CH₂OH
- 18-52 Classify cach of the following monosaccharides as an aldose or a ketose. CHO HO-C-H ÇH,OH re-ee HO'H C=0 HO-C-H HO-C-H HO-C-H HO-C-H H-C-OH CH;OH CH;OH с. CHO d. CH;OH HO-C-H C=0 H-C-OH HO-C-H CH,OH HO-Ć-H H-C-OH 18 CH;OH 18-53 ClassifWhat is the Fischer projection of the monosaccharide from which the following glycoside was prepared? НО. H- H Н CH.OH :0 -OH OH -OH CH₂OH HO- НО H ОН CH₂OH " H -H OH CH₂OH OH НО OH Н- Н- CH₂OH O H OH ОН CH₂OH Ш H— НО НО CH₂OH O OH H -H CH₂OH IV7. Draw the Haworth structure for the following monosaccharides a. H НО H c=0 H + но - н 3 4 Н 5 - ОН - OH 애 CH₂OH 6 D-Mannose b. H 0 = с H - C - OH HO-C - H H - C - OH H - C - ОН CH₂OH Glucose
- Which of the following carbohydrates is that of an L-monosaccharide? CHO CH2 H-C-OH CH2OH CHO НО-С-Н H-C-OH CH2OH CHO НО-С-Н HO-C-H CH2OH CH2OH O=C H-C-OH CH2OHWhich disaccharide contains an a(1-4) glycosidic bond? CH2OH CH,OH CH2OH CH2OH OH OH OH OH OH OH ÓH ÓHThreose is an aldose monosaccharide. The Fischer Н. projection of D-threose is shown. H. НО-С—Н HO C- H-C-OH H ОН ČH2OH Draw D-threose using wedge and dash bonds around the chiral carbon atom(s). CH2OH Answer Bank Il