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- up an example (not appearing in this ChemActivity) of a pair of molecules that are a)constitutional isomers, b) conformers. c) configurational stereoisomers.2.) Which is a pair of enantiomers? CH3 H3C CI CH;CH2CH3 CH3 CH3 CH;CH;CH3 H3C CI CH;CH2CH; II II CH,CI CH;CH2CH3 H3C CI CH;CH2CH3 IV V A. I& II and III & IV В. I & II С. II & IV D. IV & Va. Fill in the boxes with the missing structures. Be aware of stereochemistry. 1. LDA H3CO₂C 2. J CN Br t-BuOK THF H3O A
- (k) (1) OH SOCI₂ 1) BH 3 THF 2) H₂O2, NaOH Rationalize the stereochemical outcomes for A and B CH3 A ...OH B TSCI pyridine LICIConsider the stereochemistry of the equimolar mixture of compounds and its optical activity. Flm H3C F Which statement is true? Select one: the mixture is optically active the optical activity of the mixture cannot be determined by the information presented the mixture is optically inactiveCH₂CH₂CCH₂CH₂CH, H₂O Br₂ tert-BUO CH₂CH₂CH₂CH₂Br CHỊCH C—CH CHỊCH; CH₂CH₂CH₂CH.Br CH₂CH3 tert-BuO CH₂CH₂CH=CH₂ H₂O NaNH, CH3CH₂Br -CH₂CH₂CHCH₂ CH;CH C=CCHỊCH, Br excess H₂SO4 Re H₂SO4 CH;CH,C=CH CHỊCH C=C
- chem 534 cha Hư OAC H please show stereochemistry H₂ COCH ? H CO₂CH3 O Ac 2. + ? hv 9 40°C 3. H₂ C 4. 0°C Catq Q-0 + [6+4] NGC ?. لك 5. [ V-CO₂CH3 + II NCCN [4+2] C6H5 6. 2 C6H5+ NH₂ HO Ja'qub ||| Tamsulosin is a pharmaceutical used to treat an enlarged prostate. Choose the compound that would be suitable for preparing the necessary diastereomeric salts to purify the racemic mixture of tamsulosin shown below. OH IV НО. O OH OH NH₂ OH OH A) I B) II D) IVPPh3, DIAD CH20H (A) THF mitsunobu H2N sreaction NH2 excess AGOH () (Ci3H20 INS) me I N-me me
- Sn1 or sn2?Identify if the following pairs of compounds are identical, enantiomers, diastereomers or constitutional isomers. * ОН CN and H;C uNCN INCN H3C H. C HO, (ii) and O (1) Identical; (ii) Enantiomers O (1) Enantiomers; (ii) Diastereomers O (1) Enantiomers; (ii) Enantiomers O (1) Identical; (ii) Identical8. 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)
