Q2 / Draw the following compounds so that they are optically active. A) Br-CH2-CH2 -CH(CI)-CH(CI-CH2-CH2-Br B) OH-CH2-CH(CH3)-CH2-CH(CH3)-CH2-OH B/ Draw the following compound in a chair position. 13
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- CH3 KOC(CH 3)3 H;C- -CH3 Solvent: Ethanol HCI c-OH Solvent: Ethanol CH3 KOC(CH 3)3 Solvent: Toluene H3C- -CH3 HCI CH3 но CH3 Solvent: Toluene H3C H3C CH3 KOC(CH 3)3 .CI Solvent: Toluene -CH3 CH3Н- Н- c) Circle the chiral carbons in the following compounds, if any. COOH -ОН -ОН CH3 CH3 "H,C–CHCH,CH3 Br Br CH3- Н- НО- COOH -ОН H CH3 -CH3 X CH3 OH сн сненсHсн, он он1. Put a star (*) next to each chiral carbon and label it as R or S. a) b) c) d) Br H m I H H Bra Ber CI- H OCH3 H- H- CH3 -H CH₂CH3 CH3 OH -OH CH3
- Q1:- Which of the isomeric alcohols having formula CSH120 are chiral ? Which are achiral? Draw the enantiomers. Q2:- Which of the following compounds are chiral? Draw the stereo structures. a- 1-Chloro-2-bromobutane b- 1,2-Dichloro-3-methyibutane1. Put a star (*) next to each chiral carbon and label it as R or S. a) b) 2 Br Bra CH3 fH -H CI- H OCH3 H H CH₂CH3 CH3 Br -OH -OH CH310) Which of the following compounds are not chiral? A) 2,3-dibromobutane B) 1,3-dibromobutane C) 1,2-dichlorobutane D) 1,4-dibromobutane E) 1-bromo-2-chlorobutane
- Which of the following pair of organic molecules are enantiomers? CH3 Br and HOCH CuH CH3 Br CH,OH NH2 and HO HO, and HOCH2 CH3 CH3 CH2OH and ОН НО HO IIWhat compound is CH3-CH(CH3)-CH2-CH2-CHO ?5) Use compounds X, Y and Z (shown below) to answer the following questions. H. H3C" "CH3 ОН CH3 compound X compound Y compound Z a) Is compound X classified as cis, trans or neither? b) Is compound Y classified as E, Z or neither? c) Is compound Z classified as R, S or neither? d) Are compounds X and Y constitutional isomers of each other? (YES or NO) e) Are compounds Y and Z constitutional isomers of each other? (YES or NO) f) Classify compound Y as a primary, secondary or tertiary alcohol. g) Which compound(s) is(are) chiral? h) Give the IUPAC name for compound Z, omitting the absolute configuration (R or S) designation. i) In the indicated spaces below, draw stereoisomers of compounds X, Y and Z. stereoisomer of compound X stereoisomer of compound Y stereoisomer of compound Z