Name: _________________
Dr. Zhao SI: CHEM 331
Exam 1 Review
Leader: Ian Hazlett
True or False
The molecule of methylamine, CH3NH2 is an example of a Lewis base
True or False
When comparing the relative strength of acids, the weak acid has the larger
value of pKa.
True or False
If ammonia, NH3 were to behave as an acid, its conjugate base would be NH4+
ion.
True of False
A primary Carbon contains one C-H bond, a secondary Carbon contains two C-H
bonds, and a tertiary Carbon contains three C-H bonds.
Draw 1-ethyl-3-isopropyl-cyclcohexane in a chair conformation and perform a ring flip given that the
ethyl group is going into the page and the isopropyl group in coming out of the page.
Draw and name a cyclic compound with the formula C5H8Cl2
Draw a compound containing 1 sp3 carbon, 2 sp2 carbons, 1 sp carbon with the molecular formula C4H5N.
Draw the correct Lewis structure. Include lone pairs of electrons, and formal charges if any.
Name: _________________
Dr. Zhao SI: CHEM 331
Exam 1 Review
Leader: Ian Hazlett
4-isopropyl-2-methylheptane
Nitromethane, CH3NO2. (Hint, both oxygens are connected directly with N)
The conjugate acid of nitromethane
The following molecule is called Saxagliptin. Answer the following questions given the structure of
Saxagliptin below.
Y
X
Count the number of sp3 hybridized carbon atoms: __________
Count the number of sp2 hybridized carbon atoms: ___________
Count the number of sp hybridized carbon atoms: ____________
Count the number of pi bonds: ___________
Count the number of lone pairs of electrons that are present in the molecule: _________
What is the approximate bond angle at the carbon atom indicated by arrow X :_________
The bond with the arrow Y is a __________ (sigma or pi) formed by the __________ (head on or
sideways) overlap of the _____________ orbital of Carbon with the __________ orbital of Nitrogen.
Name: _________________
Dr. Zhao SI: CHEM 331
Exam 1 Review
Leader: Ian Hazlett
Circle the molecule(s) that are polar.
A) PCl3
B) CO2
C) SO2
D) CH2Cl2
E) F
F
Show the direction of polarity using the Crossed arrow (+---) and assign +/- on the atoms to indicate
the polar charges.
P----Cl
C------N
O--------H
Which of the following is an example of a Lewis acid but not a Bronsted acid?
A) H2SO4
B) HCl
C) BCl3
D) NaOH
E) CH3OH
Show the correct hydrogen bonding interactions in water (H2O) using dashed lines.
Draw the eclipsed and stagger Newman Projection of 1-Chloro-2-Fluoro-ethane.
Draw 1-chloro-3-propyl-cyclohexane, than draw it a chair conformation and perform a ring flip.
Draw all resonance structures for