Midterm 1 - CHEMISTRY 112A First Name V/^Ni at t First...

CHEMISTRY 112A
October
19, 2009
(Monday)
10:10
-
1
'l
:00 am
|NTN
1020
First
Name
V/^Ni
at
*
t
Signature
srD
#
BOX
A
What day does
your
lab meet?
(circle the
day)
Mon
Tues
Weds
Thurs
BOX
B
When does
your lab meet?
(circle the time)
Morning
Afternoon
Evening
(D
_
(25)
(lt)
_
(25)
(ilt)
_
(25)
(tv)_
(10)
(v)
_
(15)
Total
(100)
BOX
C
Circle
Your Teaching
Assistant's
Name
Ashby, Jonathan
Borukova, Svetlana
Carp,
Bobby
Ellinger,
Martin
Garcia, Angie
Krishnan, Mahesh
Lu, Wenhao
Meyet, Courtney
Pierce, Conor
Romero, Carmen
Tao,
Yuanqi
Ung,Gael
Xiao, Yongsheng
Xu,
Paul
Zhang, Xing
,fr\
lP'*
,e,-
17'
\*
,
'
,//
The back
page is
blank and can
be
torn off
and used as scratch paper.
First Midterm Examination

-2*-
Name
/l,trim
#
1
25 points
l. Answer each ol the problems A
-
D below.
A.
The
structure ol the acetate anion is shown below. Fill in any lone pairs (non-bonding
valence electrons) that are missing lrom the
linebond
structure (Kekule
structure)
shown below.
(5
pts)
lr
=
{16
l-{
!r'<
w
aa
,/loi
H3C-C:
\'-
..q:
4
J-
t..-
[email protected]
c;
b:-
ta
(f
B.
The skeletal structure
of
cortisol-21-acetate
is
given below.
This pharmaceutical
compound and its analogs are involved in glucose metabolism and
in
the
anti-inflammatory
process. The
six
functionalgroups
of
the
molecule below are labeled from
a
- 1.
Place a
letter corresponding to
the
name ol the func.tional
group
in
the
space provided
below.
Write
"none"
is
there
is
no
correct
letter.
(2
pts
each,
total
=
10
pts)
b
1.
An
alkene
L
,
^::l::,"
l'ry.ph
4.
A carboxvric
acio
J
5.
An aldehyde
o
JA
{'
P--
N,nt
H
cortisol-Z1-acetate
lUb,'ru
tw
C.
Given
that cortisol-21-acetate (shown in part
B above)
contains
23 carbon atoms,
what is its molecular
formula?
Circle the
correct answer. (5 pts)
c23H4oo6
C2sH32Oa
D.
For cortisol-21-acetate shown above in part B, what
is
the hybridization ol the
atoms of the
lunctional
group
a?
Circle the correct answer.
(5 pts)
1. sps
oxygen and
sps
carbon
2.
sps
oxygen
and
sp2
carbon
4.
sp2
oxygen and
sps
carbon
1.
C23H48O6
G;"ruPn
3.
4.
4F
5F
6€

25
points -3*-
ll.
Do each
of
the following multiple choice questions.
conect answer. (5 pts each)
Name
You must indicate
your
answer
by circling
the
fuail(fr
1
A.
How many constitutional isomers
are
there for the
molecular
formula
CaH16O
that are alcohols?
a)2
b)3
-tTa
-o-F-
B.
U/hat
is
the
IUPAC name of the following
a)
2-ethyl-3-propylpentane
b)
3-methyl-4-propylhexane
C.
\l/hich ol
the
following
represents
a
conlormation
with the substituents Br and
F in
gauche
positions?
i
compound?
r
BTF
'A-
1
F
:s]
H
2
F
;+J
Bro
F
:+;'
H4
6,.f
<,€
a)1
b)2
@
D.
\L/hich
ol the following compounds can adopt
a chair conformation in which
there
are
virtually
no
or
minimal amounts
of
axial methyl
group conformers?
a)
1,'1
-Dimethylcyclohexane
E.
What
is
the
degree
of
unsaturation (DOU index) in a molecular
lormula ol
CsHTBr2NO? (CPost-6-1)
a)3
I
4P

25 points
Name
fEus;o'\)
+
t
lll.
Do each
ot
the following multiple choice
questions.
You must indicate
your
answer by circling
the
correct answer. (5 pts each)
i----------
i
A.