What does it mean if a mixture of enantiomers has an enantiomeric excess (ee) of 60% and rotates light in the (-) direction? O 60% (-) and 40% (+) O 80% (-) and 20% (+) O 80% (+) and 20% (-) O 40% (-) and 60% racemic (±) O 60% (+) and 40% (-)
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- From the following molecules, select all that apply: CI Br A B C D CI Br CI CI CI Br CI Br .. Br CI Plius.. Br For a compound with molecular formula C2H2Br2Cl2, (1)a stereosiomer that is optically inactive because it does not have an asymmetric center. (2) a stereosiomer that is optically inactive because it is a meso compound. (3) a stereosiomer that is optically active.5) What is the relationship between each of the following pairs of molecules? Are the underlined answers correct? Explain. Br and Br (Identical Not Isomers Enantiomers Diastereomers I dentical the pos.tion of methul and Bromine becaure are at I and 3, Axial position. (b) Not Isomers Identical Enantiomers Diastereomers Br Br Br and Br (c) CHO CHO H OH HO--H COOH Not Isomers HO-H HO--H ČOOH Enantiomers Diastereomers Identical and (d) Br Enantiomers Diastereomers Not Isomers and Identical BrIdentify (circle) all the chirality centers НО
- 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) IdenticalFrom the following molecules, select all that apply: CI Br A B D CI Br CI Br Om... Br Br O Br Br 110 For a compound with molecular formula C2H2Br2Cl2, (1)a stereosiomer that is optically inactive because it does not have an asymmetric center. (2) a stereosiomer that is optically inactive because it is a meso compound. (3) a stereosiomer that is optically active.Identify any chiral centers within the 2 molecules and identify whether each molecule is chiral or archial. If it is chiral, explain whether you expect a single enantiomer or a mixture of enantiomers to be formed.
- 11. Which of these molecules are meso isomers? H Cl CL Cl I (A) I only (C) III only H Cl CI II H/H CI III (B) II only (D) I and II onlyWhich of the following centers have R chirality? Select all that apply. A.A О в. в Dc.c OD.D OE.E OF.F B E F) None of the aboveH3C Cl \ / C=C / \ H2N I (R)-enantiomer (Z) isomer (S)-enantiomer (E) isomer meso compound
- Which of the following correctly describes the relationship of the molecules shown to Compound A? HO;C COH Compound B CO,H HO;C Co,H HO,C CI Isomer A CI Compound C HO,C co,H Compound D B= diastereomer OC- diastereomer D= enantiomer B- diastereomer C = meso (identical) D= diastereomer B= meso (identical) C-diastereomer D= diastereomer B= meso (identical) OC- enantiomer D= diastereomer3), compounds, enantiomers, diastereomers, or constitutional isomers). The same answer can be used more than once. For the following pairs of compounds, indicate the relationship (identical (a) (b) H H H HO CO,Me MeO,COH NH2 NH2 H. HN -NH2 MeO,cT'OH H. HOTCOME H (c) H CHCH3 (d) CH3 Br. H H он Br- -CH,CH, Br H +H H- Br -H H H HO- -H CH3 H3C- Br -Br ČH3 ČH3 3Which of the following compounds is chiral? HOl None of them CH H HC CH,CH, (D) A (C) (E) (B) O A O B OC