b) 1. Ho, Lindlar 2. Br₂, DCM (CH₂C₁₂) Skeletal Structure The reaction above produces two enantiomers. Show the Perspective Formulas of each: 1

2. Use the Newman projection to identify the structure shown: (a) as a Fischer projection (b) as a bond-line structure (c) by name Circle your answer for each part. CH2CH3 F+ H CH(CH3)2 CH2CH3 H+ F CH(CH3)2 三F H CH2CH3 H H F no CH(CH3)2 geslaan sam o Y (S)-4-fluoro-2-methylhexane F (R)-4-fluoro-2-methylhexane

H3C --CH3 Which structure(s) below represent(s) the diastereoisomer(s) of the compound on the picture? Br CH3 C CH3 A B CH3 H3C 'Br Br CH3 H3C Br CH3 E CH3 --CH3 H3C.. Br Br Br H3C -.

3) Draw the ECSF structures of (CH3)3CO (tert-butoxide ion) and CH30º (methoxide ion). Why is (tert-butoxide a PN but methoxide a GN even though both have a full O? (As it turns out, both are SBs) Redraw (CH3)3coe (ECSF) Why PN? Redraw CH30S (ECSF) Why GN?