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All results from a given calculation for CH3COOCH3 (methyl acetate)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-268.285983
Energy at 298.15K-268.292689
Nuclear repulsion energy181.040644
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B3PW91/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3201 3062 6.23      
2 A' 3193 3054 16.53      
3 A' 3081 2948 6.48      
4 A' 3080 2946 24.11      
5 A' 1855 1774 227.70      
6 A' 1522 1456 8.64      
7 A' 1496 1432 19.99      
8 A' 1491 1426 13.34      
9 A' 1417 1356 63.57      
10 A' 1302 1246 323.80      
11 A' 1219 1166 1.07      
12 A' 1100 1053 58.61      
13 A' 1000 957 1.30      
14 A' 875 838 16.23      
15 A' 650 622 6.09      
16 A' 422 404 6.22      
17 A' 283 271 12.54      
18 A" 3160 3023 21.87      
19 A" 3152 3016 4.60      
20 A" 1510 1444 7.79      
21 A" 1499 1434 8.00      
22 A" 1185 1134 0.72      
23 A" 1073 1026 9.27      
24 A" 607 581 5.51      
25 A" 182 174 6.82      
26 A" 128 123 0.19      
27 A" 47 45 0.54      

Unscaled Zero Point Vibrational Energy (zpe) 19865.5 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 19005.3 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B3PW91/6-31G*
ABC
0.33978 0.13949 0.10270

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.129 1.489 0.000
C2 0.000 0.491 0.000
O3 -1.180 0.757 0.000
O4 0.478 -0.771 0.000
C5 -0.520 -1.795 0.000
H6 0.720 2.500 0.000
H7 1.761 1.343 0.882
H8 1.761 1.343 -0.882
H9 0.027 -2.739 0.000
H10 -1.152 -1.719 0.889
H11 -1.152 -1.719 -0.889

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.50662.42162.35243.67491.09031.09481.09484.36954.03564.0356
C21.50661.20941.34982.34472.13372.14562.14563.23032.64642.6464
O32.42161.20942.25462.63632.57773.12533.12533.69852.63122.6312
O42.35241.34982.25461.42943.28022.62572.62572.01872.08442.0844
C53.67492.34472.63631.42944.47033.97833.97831.09071.09361.0936
H61.09032.13372.57773.28024.47031.78891.78895.28464.70044.7004
H71.09482.14563.12532.62573.97831.78891.76344.52194.22634.5823
H81.09482.14563.12532.62573.97831.78891.76344.52194.58234.2263
H94.36953.23033.69852.01871.09075.28464.52194.52191.79451.7945
H104.03562.64642.63122.08441.09364.70044.22634.58231.79451.7781
H114.03562.64642.63122.08441.09364.70044.58234.22631.79451.7781

picture of methyl acetate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 125.804 C1 C2 O4 110.765
C2 C1 H6 109.454 C2 C1 H7 110.126
C2 C1 H8 110.126 C2 O4 C5 115.027
O3 C2 O4 123.431 O4 C5 H9 105.678
O4 C5 H10 110.712 O4 C5 H11 110.712
H6 C1 H7 109.908 H6 C1 H8 109.908
H7 C1 H8 107.293 H9 C5 H10 110.482
H9 C5 H11 110.482 H10 C5 H11 108.763
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.597     -0.598
2 C 0.603     0.165
3 O -0.469     0.166
4 O -0.440     0.166
5 C -0.283     0.068
6 H 0.208     0.068
7 H 0.206     -0.052
8 H 0.206     -0.396
9 H 0.185     -0.531
10 H 0.191     0.821
11 H 0.191     0.122


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.511 -0.963 0.000 1.792
CHELPG        
AIM        
ESP -2.344 -3.834 0.000 4.493


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.829 -2.688 0.000
y -2.688 -31.362 0.000
z 0.000 0.000 -28.816
Traceless
 xyz
x 0.260 -2.688 0.000
y -2.688 -2.040 0.000
z 0.000 0.000 1.780
Polar
3z2-r23.560
x2-y21.534
xy-2.688
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 118.339
(<r2>)1/2 10.878