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- What is the relationship between the following molecules? OCH H3C H,CO O constitutional isomers O same molecule O conformational isomers enantiomersDescribe the stereochemical relationship between the two structures below. H H CHO OH OH CH₂OH I OA Mesomers HO H B. Enantiomers OC. Conformers D. Raceomers E.Diasteromers CHO -H -OH CH₂OH II8. 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)
- NH2 N CH2 CH2 The stereochemistry around this chiral carbon is: O cannot be determined. O Rand S OR OS2 Draw all stereoisomers for the following molecules; indicate the stereochemica interrelationships (enantiomer, diastereomer, or meso) for all its possible pairs. 4) H;C CH3 Но CH3 OH CI CI Но OHWhat term best describes the relationship between the structures below? COOH | COOH | HC-CH3 OH HO H3C-CH O Conformational isomers Diastereomers Enantiomers Mirror images
- istry Classify the following compounds as chiral, achiral (but not meso), or meso. CH3 1st structure: OH он Он 2nd structure: HO2C CO2H 3rd structure:Which statement is correct about stereoisomers A, B, and C? H- CI CH3 S S CH3 A CI -H CI H A and B are enantiomers, C is a meso compound. A and C are enantiomers, B is a meso compound. A, B, and C are all meso compounds. Band C are enantiomers, A is a meso compound. CH3 R R CH3 B -H - CI H- H CH3 S R CH3 C CI -CIQ2 Give the stereochemical relationships between each pair of structures. Examples are same compound, structural isomers, enantiomers, diastereomers fa CH. OH HO- OR HO CH, CH. CH,
- NH2 NH2 of the most important properties of chiral ules in solution is their effect on plane- zed light, this effect is called optical activity. -H 2 COOH HOOC 3 H3C CH3 an enantiomer rotates a plane-polarized light e positive direction or clockwise, it is rotary (+ or d), while for a negative direction unterclockwise, it is levorotary (- or l) (+)-Alanine (-)-Alanine Alanine is a chiral amino acid that has two enantiomers: (+)-alanine and (-)-alanine. These two are optical isomers. 78. Which enantiomer of alanine rotates the plane polarized light clockwise?Identify the enantiomers, meso compounds, and diastereomers among the stereoisomers below. CH3 ÇH3 CH3 CH3 HO он HO H OH он он H H OH OH H3C H3C H3C d. H3C а. b. с. C----O C.Identify the stereochemical configuration of this compound. SH CH3 O R S
