Question

1. Draw the dash-wedge structure that corresponds to the following Newman proje OH Htci CH CH3 4 Label each stereocenter in the following molecule with an asterisk (*) and identity it as na configuration. molecule with an asterisk (*) and identify it as having an R or an S NH2 3. Draw the most stable chair conformation for the following molecule. 4. Draw 3-ethoxypentane. 5. Assign the priority of the substituents around the asymmetric carbon. Br H I BY BE

Answer 1

Answer 1. Drow the correspond projection. dash -wedge structure that to the following Newman B c H oh al CHA 4- cl- CH3 alla from this we dash of wedge draw. above form. 2. label each stexo cents in the following molecules with an asterisk f identify it as having Ror on s configuration - on configuration. NH2

These are two OH chiral center. WHA CH3 Coa cha И ) 's' configuration. NH2 Cl2 OMS NH2 ①

- R os it has is configuration. Ha Here. the configuration is reverse because of fourth priority group is above the plane. 3. Draw the of the stable chair conformation most following. 3 CH-CH3 대로 stable form. - is This at is due to the equatorial most bukier position. group

4. Draw 3-ethoxy pentane 5. Assign the priority of the substituent around the asymmetric Carbon , Br Br Br - Highest if atomic same then Atomic No. have first priority. No. of two substituent is consider the attached atom