5.5 Nomenclature of enantiomers: The(R-S) system 2-Butanol CH3 CH3 HI H CH2CH3. H3CH2C (2S)-2-butanol (2R)-2-butanol OH CH2 CH3 H
5.5 Nomenclature of enantiomers: The (R-S) system 2-Butanol CH3 OH CH2 CH3 H CH3 H3 CH2 C OH H (2S)-2-butanol (2R)-2-butanol C* OH CH2 CH3 CH3 H
Groups containing double or triple bonds 1-Penten-3-ol CH2CH 3 CH2CH3 H OH CH=CH2 i H2C=HC OH (3S)-l-penten-3-o1 (3R)-1- lenten-3-01 C兴 OH>CH=CH2> CH2CH3> H
Groups containing double or triple bonds CH2 CH3 O CH=CH2 H H CH2 CH3 H2 C=HC OH H (3S) -1-penten-3-ol (3R)-1-penten-3-ol C* OH CH=CH2 CH2 CH3 H 1-Penten-3-ol
Problem 5 11 Assign( R)or(S) designations to each of the following compounds H H= Br CH=CH, F CH=CH2 H3C C-CH CH2CH3 3R) 3R) 3R)
Problem 5.11 Assign ( R) or (S) designations to each of the following compounds Br CH=CH2 CH3 CH2 CH3 (a) F CH=CH2 H (b) H3 C C H (c) CH (3R) (3R) (3R)
Sample problem; Consider the following pair of structures and tell whether they represent enantiomers or two molecules of the same compound in different orientations H Cl Br CH3 Br B
Sample problem; Consider the following pair of structures and tell whether they represent enantiomers or two molecules of the same compound in different orientations. H Cl CH3 Br A Br CH3 Cl H B
Method 1 CH CH I CH3 H3CL HH cl Br Br Br B B B Method 2 CH CH 3 Br CH. H H Br Br B B A
H Cl CH3 Br A Br CH3 Cl H B H3C H Cl Br B H Cl CH3 Br B Method 1. H Cl CH3 Br A Br CH3 Cl H B H Cl CH3 Br B Method 2