General Chemistry II: Problem Set 4
1. Draw the resonance structures for a glycine-glycine
peptide bond by showing the six atoms involved in the peptide bond along with
their respective bonds and charges for each resonance structure.
2. Draw all acid/base forms of the amino acid serine; show all bonds,
charges and lone electron pairs for each of your structures.
3. Determine which of the following are chiral
molecules; fully support each answer:
a. CH3CHBrCH2CH3
b. CH3CH2CH2CH2Br
c. CH3CHOHCOOH
d. CH2OHCH2COOH
4. Review problem: Para-dichlorobenzene has a log P value of
3.37. 100 ml of water are mixed with 50
ml of octanol.
200 mg of para-dichlorobenzene are added to
this mixture which is then well shaken.
Calculate the amount (mass) of para-dichlorobenzene
that will partition to the 1-octanol phase at equilibrium.