The Fischer projection for D-glyceraldehyde (R stereochemistry) is: CHO нон CH2OH Which compound has the same stereochemistry? A) HO 7) Using the sug B) B) b) c) H HỌ CHO CH₂OH CHO HCH₂OH OH H DTC) OH+CH₂OH CHO (from 6), who OH D) HCHO CH₂OH
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- The structure of 4 isomers of ketopentose are shown. 1) select every structure that is a diastereomer of structure D A, B, or C? 2) select every structure that is a enantiomer of structure C A, B, or D 3) select every structure that is a stereoisomer of structure C A, B, or DDraw all possible stereoisomers for the molecule in Fischer projection and label the relationship between each of the isomer.Of the four structures shown here in Fischer projections, indicate the relationships between (a) and (b), and between (c) and (d)? CHO CHO нтон нотн CH₂OH (a) CH₂OH (b) ÇO₂H H-OH -OH -он но- HO- CO₂H (c) II HO-H ÇO₂H of A. Both pairs are enantiomers O B. Both pairs are identical C. (a) and (b) are enantiomers, (c) and (d) are identical D. (a) and (b) are identical, (c) and (d) are enantiomers II CO₂H (d)
- 8. Identify the stereochemical relationship between the structural pairs shown below as (A) identical structures that are not meso; (B) identical structures that ARE meso; (C) structures that are enantiomers; or (D) structures that are diastereomers. a) b) H3C c) CH3 Br H. CH3 Br Br CH3 H. CI Holl H Cill Cl- CH3 Br H. CI CH3 HO. H. H3C Cl H3C- H- H. CH3 Cl a) b) c) 9. Identify the stereochemical relationship between the structural pairs shown below as (A) identical structures that are not meso; (B) identical structures that ARE meso; (C) structures that are enantiomers; or (D) structures that are diastereomers. a) b) c) CH2CH3 NH2 HO CH3 H3C. CH3 Cl HO H;C CH2CH3 F. F H;C. CI H H,N -CH3 CH3 NH2 H3C Br H2N C1 H3C CH3 CH3 H;CH,C- Cl F H. H Br CH,CH3 CH3 a) b) c)tion 6 of 17 > The structures of four isomers of a ketopentose are shown. OH کر کو 3 E D C 80 OH H-C-H 0=C HOLC-H HOC CH H-C-H OH A Dc $ 4 D B D D A Which of the structures are diastereomers of A? R F A DOD F4 H-C-H V OH C=0 HICIOH Но..C.....H HOLC-H HOCH H-C-H OH Which of the structures are stereoisomers of C? % 5 B T G H-C-H Es C=0 B H-C-H OH 6 C FG Y H & 7 OH H-C-H N 0=C HOLC…H HICIOH H-C-H 99 U OH D J * 8 M Which of the structures are enantiomers of C? - Ов OD A DII FB ( - 0 9 K DD FO H O < ) -O L command J F10 P A. : c F11 { [ option + ? 11 I 1 Attempt 5 F12 } 1 delete5. Given the following structure: (a) Draw all the stereoisomers; CH2 OH (b) Identify all of the enantiomeric and diastereomeric pairs; (c) Assign R or S configuration at each asymmetric carbon for each structure. Justify your assignments for the original structure (above).
- 5) Which of the following compounds have an asymmetric center? A) H3C CH3 H B) -CI CH;CH; C) D) E) H- -CH(CH3)2 CH;CH; CH;(a) Draw all possible stereoisomers of 4-methylnon-2-ene, and name each isomer, including its E,Z and R,S prexes. (b) Label two pairs of enantiomers. (c) Label four pairs of diastereomers.Give detailed answer with explanation needed
- Which shows the chair conformation of B-D-glucopyranose (Fisher projection shown below)? CHO H-OH HO-H H- -ОН H- -ОН ČH2OH OH OH HO ÓH OH OH OH Но- OH Он HỌ HO- HO он Но OH OHerences) Draw a structural formula of the SR configuration of the compound shown below. CH3 S NR HO Use the wedge/hash bond tools to indicate stereochemistry where it exists. Include H atoms at chiral centers only If a group is achiral, do not use wedged or hashed bonds on it. oodConsider the following two structures CI OH ОН ОН HOO H-CI HO- -H H- -ОН A) Determine the configuration of all stereogenic carbons in both structures (R vs. S). Show work! B) Convert the Fischer Projection to a bond-line structure. C) What is the relationship between the two structures? (identical, enantiomer, diastereomer, constitutional isomer, different/not an isomer)