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: wB97X-D/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at wB97X-D/3-21G*
 hartrees
Energy at 0K-266.827125
Energy at 298.15K 
HF Energy-266.827125
Nuclear repulsion energy179.761453
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 wB97X-D/3-21G*
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' 3224 3055 3.68      
2 A' 3216 3048 11.03      
3 A' 3114 2952 0.48      
4 A' 3098 2936 17.60      
5 A' 1817 1722 155.11      
6 A' 1566 1484 10.92      
7 A' 1531 1451 21.13      
8 A' 1509 1430 14.68      
9 A' 1451 1375 45.74      
10 A' 1282 1215 336.21      
11 A' 1204 1141 5.70      
12 A' 1087 1030 63.48      
13 A' 995 943 0.97      
14 A' 836 793 14.62      
15 A' 645 611 6.04      
16 A' 413 391 6.73      
17 A' 274 260 15.11      
18 A" 3183 3017 2.02      
19 A" 3171 3005 18.98      
20 A" 1555 1474 12.20      
21 A" 1544 1463 11.74      
22 A" 1175 1113 0.00      
23 A" 1110 1052 14.98      
24 A" 608 576 5.13      
25 A" 173 164 10.78      
26 A" 84 80 0.08      
27 A" 28i 26i 1.01      

Unscaled Zero Point Vibrational Energy (zpe) 19917.5 cm-1
Scaled (by 0.9478) Zero Point Vibrational Energy (zpe) 18877.8 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 wB97X-D/3-21G*
ABC
0.33106 0.13711 0.10061

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.156 1.466 0.000
C2 0.000 0.516 0.000
O3 -1.190 0.796 0.000
O4 0.472 -0.772 0.000
C5 -0.531 -1.817 0.000
H6 0.778 2.488 0.000
H7 1.779 1.299 0.884
H8 1.779 1.299 -0.884
H9 0.008 -2.765 0.000
H10 -1.173 -1.754 0.883
H11 -1.173 -1.754 -0.883

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.49682.44052.34023.69131.08951.09391.09394.38374.07074.0707
C21.49681.22321.37112.39232.12022.13522.13523.28022.70272.7027
O32.44051.22322.28532.69532.59553.13843.13843.75732.69862.6986
O42.34021.37112.28531.44853.27402.60362.60362.04602.10922.1092
C53.69132.39232.69531.44854.49953.97843.97841.09021.09361.0936
H61.08952.12022.59553.27404.49951.78741.78745.30854.75134.7513
H71.09392.13523.13842.60363.97841.78741.76814.52024.24634.5994
H81.09392.13523.13842.60363.97841.78741.76814.52024.59944.2463
H94.38373.28023.75732.04601.09025.30854.52024.52021.78801.7880
H104.07072.70272.69862.10921.09364.75134.24634.59941.78801.7665
H114.07072.70272.69862.10921.09364.75134.59944.24631.78801.7665

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 127.310 C1 C2 O4 109.291
C2 C1 H6 109.111 C2 C1 H7 110.042
C2 C1 H8 110.042 C2 O4 C5 116.054
O3 C2 O4 123.399 O4 C5 H9 106.543
O4 C5 H10 111.371 O4 C5 H11 111.371
H6 C1 H7 109.897 H6 C1 H8 109.897
H7 C1 H8 107.840 H9 C5 H10 109.915
H9 C5 H11 109.915 H10 C5 H11 107.735
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.694      
2 C 0.661      
3 O -0.498      
4 O -0.531      
5 C -0.388      
6 H 0.247      
7 H 0.254      
8 H 0.254      
9 H 0.232      
10 H 0.232      
11 H 0.232      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.298 -0.938 0.000 1.601
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.160 5.074 0.000
y 5.074 -25.718 0.000
z 0.000 0.000 -28.830
Traceless
 xyz
x -4.886 5.074 0.000
y 5.074 4.777 0.000
z 0.000 0.000 0.108
Polar
3z2-r20.217
x2-y2-6.442
xy5.074
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.267 0.265 0.000
y 0.265 6.028 0.000
z 0.000 0.000 3.718


<r2> (average value of r2) Å2
<r2> 121.380
(<r2>)1/2 11.017