Question

CHM 211 STEREOCHEMISTRY Chapter 5 Write the IUPAC name for the following compounds and including the Rors configuration when appropriate? (1 pr. each) он CH.CH (a) HOCHB (d) H OH OH 10. Draw a dash-wedge structure for the following? (1 pt cach) (a) (1R)-1-bromo-1,3,3 trimethylcyclohexane (b) (2S,4S)-2-bromo-4-methylhexane 11. Draw fisher projection formula of (2S, 3R 45)-2,4-dichloro-3-methylhexane? (1)

Answer 1

a Hz HO (2S-1-bromopropan-2-ol Br Absolute configuration: priority order: OH > CH2-Br > CH3>H eyesight moves in anticlockwise direction and lowest priority group H is going away from the viewer. Hence configuration is "S". ь сн, Convert Newman to bond line form: CH,CH, Br HT HN CHz 3-bromopentana H There is no chiralcenter hence no configuration. нас (2S,3S)-2-bromo-3-chlorobutane H My CH3 CH3 CH3 (2S,3R)-butane-2,3-diol HOH НЕОН FOH HER OH I CH CH3

10) a) Hzcoa, CH₃ CH3 (1R)-1-bromo-1,3,3-trimethylcyclohexane b) BIÇHz CH3 Hac (2S,4S)-2-bromo-4-methylhexane 11) Fischer projection: CH3 H-Sci H3CH CH H+H CH3 (25,3R.45) 2,4-dichloro-3-methylhexane