Question

1. a. Draw the Lewis dot structure for (CH3)2N (5 pts) b. Between CH,CH SH and CH, CH3NH2, which is a stronger Bronsted-Lowry acid? Account for the difference in acidity? (5 pts) 2. You have learned about the active ingredient in NutraSweet, aspartame, which is made from two amino acids; aspartic acid and phenylalanine. A related sweetener, alitame, is shown below: + oH NH2O N. OH a. Label all stereocenters with the appropriate (R) or (S) configuration. (6 pts) b. Draw the enantiomer of the compound shown above. (4 pts)

Answer 1

Solution : 4. Q. Lewis dot strowe ture of Trime Hylamine C (CH3)3N] FH H los sie Hiç: N:C:H to colle H 1.C.H.H NH b. A chemical species that donates one a more hydrogen ions in an aqueous solution is Called 'Bronsted lowny acid. and a chemical species that accepted one or more tydrogen ions in an aqueous solution is called 'Bronsted lowny. Base. CH₂ CH2 SH (aq) - H+ + CH₃ CH₂50 (acid) o po Conjugate base CH₂ CH₂ MHz (ar) + H+ - CH₂ CH₂ H₃ (Base) o Conjugate base This ethanol (CH3 CH₂SH) is a stronger bronsted-Lowry deid. o pH of the thics ethanol (CH3 CH2SH) is less deen f (<7); it's acidic in nature. pH of the Etylamine (CH₂ CH2 MH2) is grater then 7 (77) it's basic in nature.

oy [] ®- Configusa hion - Configuration. ['t denoted Chinaus center; so, they are stereocents] [ Rule: 1*2 3 anticlock wise; 4 font negative; ® - conformation ar vice-versa z [ Rule: 1423 anticlock wise; y back positive; 6 Conformation ar vice-versa ] ( b). Enantiomes: The Chincal molecules one non-superimposable on one another but they are they one minnon image each other is called Enantiomer. ® - configuration - Configuration. (Mirror) H Mtz a Mile H st ll O NO -OH Con figmanon ② - Configenation [Enantiomer -o-