Name:_ _ _ _K...;../j_f...l..Y_ _
2 Sep 2015
Prof. J. Urban
SC225 Quiz 1
1. Show the complete Lewis structure for CHsN. (2 points)
1+
I
,
.­
I%-
t-\
(-\: -L -tJ -
\
[4
2. Report the formal charges for any atoms in the completed Lewis structures below that have
non-zero formal charges. ().. ,oints)
H
: dy.r\
H
\\
C-H
.. /
:0: .... \
I
/~t\
I
\\ H-C-N /
H
H
0:
3. Which resonance structure is more stable and why? Provide the information needed to support
your argument. (:3 points)
· '..
X
'0'
H·
H
N/
I
H
B
4.
.j
Use heavy and dashed wedged lines to show the shape of the molecule below. Show the bond
dipole of any polar bonds. Is the molecule polar?(2 pOints).
~ ~
~~ 1-1>l,fvl~~~
H O. H
/
I II
I
'] H-y-C-y-H
H
H
IV- \-.
~~ ~T ~ 1\
I+-_ /
w \,·f
~
<::.
\~
C -:; D
.
t'(~~'\~
M
5. Provide a prediction of the CNC angle in HzC=N-H. Justify your answer. (1 points)
I
ff41fi1\ J
"I,
,50
(;)J.
~lt ~
t