Question

For 2-chloro-3-hexanol: Draw the structure of all the possible stereoisomers with Fischer Projection and Perspective Formulas showing both eclipsed and staggered conformations). 2) Assign the configuration of all chiral centers with R or S. (3) Give the complete IUPAC name for each stereoisomers. (4) Indicate the relationship among the structures, indicating which are the threo or erythro enantiomer, and diastereoisomer pairs.

Answer 1

structure of 2-chloro-3-hexanol. OH (a) Here number of chiral centres=2 which are shown above through asterics. So according to the formula of unsymmetrical molecule number of possible stereoisomers are 2 where na no. of chiral centres The possible stereoisomers are shown below in Fischer projection and perspective formulas: CH3 СН3 H- H- I OH HO I C₃H7 (II) CHE CH3 н . aHa Ha I OHHOH - C₂Hz estat C₂ Hz (11) (IV)

is HO- H a OH H 3 c H SCHE (I) (23,352 (25,35)-2-chlorohexan-3-01 (25,3R) - 2-chlorohexan-3-01 eng 3 C3H7 CH (iv) (III) (2R, 35)-2-chlorohexan-3-ol (28,3R)-2-chlorohexan-3-01 ( (1) Erythro (with respect to ts) isomer. (11) Threo somer (w.rit HS). (11) Threo isomer (w. 2. t Hs) (IV) Erythro isomer (w.sit As) DU) x (v) are mirror image to each other (11) & (III) are mirror image to each other . I ly are erythero enantiomers II 2 111 are threo enantiomers

a I & I & II II are are diastereomers diastereomers diastereomers diastereomers, II & IV III X IV are are