Draw all products for each of the following reactions or reaction sequences. For chiral molecules that are racemic, you needn't draw both enantiomers (just write if it exists an enantiomer). BE CAREFUL TO SHOW THE CORRECT ORIENTATION, AND THE CORRECT STEREOCHEMISTRY IN CASES WHERE STEREOCHEM IS FACTOR. Write also the name of the reaction that is occurring. Br, H,0 HBr
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- ? Modify the given carbon skeleton to draw the major product(s). If a racemic mixture of enantiomers is expected, draw both enantiomers. Note: you can select a structure and use Copy and Paste to save drawing time. C A z + : 1) OsO4 2) NaHSO,/ H₂O H3C CH3 H с N O P S LL F CI Br I iDraw mirror images for these molecules. Are they different from the original molecule? (a) (b) • Use the wedge/hash bond tools to indicate stereochemistry where it exists. Include H atoms at chiral centers only. • Use the "flat" representation of rings in your drawing where appropriate. ● HO ||||| O different O the same Sn [F ? ChemDoodleⓇ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)
- In the boxes below provide the major D containing products. If the product is a chiral molecule be sure to label as racemic or optically active! рриз cat. H₂SO4 H₂ODetermine whether each of the following names describes a single stereoisomer unambiguously. For each one that does,rewrite the name using the R and S designations for the chiral centers if appropriate. (a) cis-1,2-difluorocyclohexane;(b) trans-1,2-difluorocyclohexane; (c) trans-1,4-difluorocyclohexane; (d) cis-1-chloro-2-fluorocyclohexane; (e) trans-1,4-dimethylcycloheptane4. - Determine the structural relationship between the compounds in each of the pairs that follow. They may be unrelated, identical (the same compound), constitutional isomers, diastereoisomers, enantiomers? - Identify the optically active (chiral) compounds and any meso compounds. - Assign a configuration (R or S) to all stereocenters. - Name all compounds so that the name reflects the structure unambiguously. a) b) c) d) e) f) H- HO- CHO H3C -NH₂ H- -H H- CH2OH H CH3 CH3 H Ph H CH3 H H CI Ph H H CI CH3 CH₂OH -OH -NH₂ CI H H CI & t OH CHO H3C H OH O-CH3 oma O-CH3 H3C OH
- Draw all of the possible stereoisomers of the compound shown. Group them as enantiomeric pairs, or indicate any meso compounds. Label all stereocenters with the absolute stereochemistry (R or S).g) Reaction 1g pts] For 2-chloro-3-fluorocyclohexane, draw all possible stereoisomers, and identify their stereochemical relationships using the labels we used in class (E = enantiomers; D=Diastereomers; I = identical.) Make sure to label each chiral carbon in each compound with the correct R/S designation.[Review Topics) References] M Identify the absolute configuration of the chirality centers in each of the following compounds as R or S. Note: if multiple chirality centers are present, indicate the stereochemical designations as: RR, SS, RS, or SR (Other terms used for chirality center include chiral center, stereocenter, and stereogenic center.) M MD M CH3 req N. req NH2 req HO2C НО-С 9 more group attempts remaining Retry Entire Group Submit Answer Nes Previous Save and Exit 7:01 PM ) E 10/30/2019
- What is the stereochemical outcome of this reaction? 1. BH3-THF 2. H₂O2, NaOH (aq) a single chiral molecule enantiomers, unequal amounts diastereomers, equal amounts a single achiral molecule diastereomers, unequal amounts enantiomers, equal amounts product(s)Draw a structural formula of the RS configuration of the compound shown below. OH R U CH 8 _CH_ SI ephedrine [*** NH-CH3 CH3 • 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. ▾ Sn [F ?Consider the following structures. (a) (d) (b) (e) (a) Which of the structures are chiral as drawn? (Select all that apply.) structure (a) structure (b) structure (c) structure (d) structure (e) structure ( structure (c) structure (d) O (1) (b) When placed in a solution at 298 K, which structure(s) will show an optical rotation? (Select all that apply.) structure (a) structure (b) Previous