return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-268.316802
Energy at 298.15K-268.323551
Nuclear repulsion energy181.483226
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 mPW1PW91/6-31G*
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' 3221 3055 5.60      
2 A' 3213 3047 15.81      
3 A' 3100 2940 7.54      
4 A' 3099 2939 21.86      
5 A' 1874 1777 234.70      
6 A' 1531 1452 8.81      
7 A' 1505 1427 24.37      
8 A' 1500 1423 12.76      
9 A' 1427 1353 73.89      
10 A' 1319 1250 321.52      
11 A' 1228 1164 1.09      
12 A' 1114 1057 55.99      
13 A' 1009 957 1.39      
14 A' 886 840 16.04      
15 A' 656 622 6.62      
16 A' 425 403 6.42      
17 A' 286 271 12.68      
18 A" 3181 3016 20.78      
19 A" 3173 3009 4.01      
20 A" 1519 1440 7.96      
21 A" 1507 1429 8.28      
22 A" 1194 1132 0.81      
23 A" 1080 1024 9.64      
24 A" 612 580 5.87      
25 A" 184 174 6.86      
26 A" 132 126 0.21      
27 A" 53 50 0.55      

Unscaled Zero Point Vibrational Energy (zpe) 20012.9 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 18978.2 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 mPW1PW91/6-31G*
ABC
0.34159 0.14021 0.10324

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.124 1.488 0.000
C2 0.000 0.489 0.000
O3 -1.178 0.751 0.000
O4 0.478 -0.769 0.000
C5 -0.516 -1.790 0.000
H6 0.712 2.496 0.000
H7 1.755 1.343 0.880
H8 1.755 1.343 -0.880
H9 0.029 -2.733 0.000
H10 -1.148 -1.714 0.888
H11 -1.148 -1.714 -0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.50372.41672.34773.66591.08871.09311.09314.36114.02524.0252
C21.50371.20691.34582.33712.13002.14102.14103.22222.63792.6379
O32.41671.20692.24822.62652.57263.11873.11873.68752.62052.6205
O42.34771.34582.24821.42563.27372.62022.62022.01492.07962.0796
C53.66592.33712.62651.42564.45933.96873.96871.08901.09201.0920
H61.08872.13002.57263.27374.45931.78671.78675.27394.68774.6877
H71.09312.14103.11872.62023.96871.78671.76104.51324.21554.5712
H81.09312.14103.11872.62023.96871.78671.76104.51324.57124.2155
H94.36113.22223.68752.01491.08905.27394.51324.51321.79181.7918
H104.02522.63792.62052.07961.09204.68774.21554.57121.79181.7751
H114.02522.63792.62052.07961.09204.68774.57124.21551.79181.7751

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 125.791 C1 C2 O4 110.838
C2 C1 H6 109.456 C2 C1 H7 110.066
C2 C1 H8 110.066 C2 O4 C5 114.954
O3 C2 O4 123.370 O4 C5 H9 105.734
O4 C5 H10 110.691 O4 C5 H11 110.691
H6 C1 H7 109.955 H6 C1 H8 109.955
H7 C1 H8 107.318 H9 C5 H10 110.486
H9 C5 H11 110.486 H10 C5 H11 108.743
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.605      
2 C 0.611      
3 O -0.475      
4 O -0.448      
5 C -0.287      
6 H 0.211      
7 H 0.209      
8 H 0.209      
9 H 0.188      
10 H 0.193      
11 H 0.193      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.525 -0.952 0.000 1.797
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.826 -2.683 0.000
y -2.683 -31.395 0.000
z 0.000 0.000 -28.805
Traceless
 xyz
x 0.274 -2.683 0.000
y -2.683 -2.080 0.000
z 0.000 0.000 1.806
Polar
3z2-r23.611
x2-y21.569
xy-2.683
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> 117.814
(<r2>)1/2 10.854