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: QCISD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31+G**
 hartrees
Energy at 0K-267.675367
Energy at 298.15K-267.682144
HF Energy-266.850267
Nuclear repulsion energy 
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 QCISD/6-31+G**
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' 3245 3067 16.19      
2 A' 3240 3063 6.02      
3 A' 3126 2955 32.97      
4 A' 3122 2952 2.84      
5 A' 1821 1722 262.52      
6 A' 1547 1463 8.17      
7 A' 1523 1440 14.34      
8 A' 1513 1431 9.44      
9 A' 1452 1373 48.23      
10 A' 1318 1246 344.99      
11 A' 1236 1168 1.63      
12 A' 1108 1047 71.62      
13 A' 1013 958 5.07      
14 A' 872 825 22.17      
15 A' 649 614 7.80      
16 A' 428 405 5.58      
17 A' 289 273 12.98      
18 A" 3217 3041 21.21      
19 A" 3203 3028 6.26      
20 A" 1532 1448 6.10      
21 A" 1522 1438 7.37      
22 A" 1198 1133 2.75      
23 A" 1090 1030 3.79      
24 A" 607 574 8.25      
25 A" 176 166 7.68      
26 A" 149 141 1.12      
27 A" 47 45 0.27      

Unscaled Zero Point Vibrational Energy (zpe) 20121.8 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 19023.1 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 QCISD/6-31+G**
ABC
0.33757 0.13844 0.10193

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.119 1.504 0.000
C2 0.000 0.495 0.000
O3 -1.191 0.751 0.000
O4 0.489 -0.770 0.000
C5 -0.511 -1.810 0.000
H6 0.698 2.506 0.000
H7 1.744 1.358 0.881
H8 1.744 1.358 -0.881
H9 0.048 -2.741 0.000
H10 -1.135 -1.732 0.889
H11 -1.135 -1.732 -0.889

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.50702.42932.36033.69331.08641.09001.09004.37794.04254.0425
C21.50701.21781.35652.36072.12842.13602.13603.23592.65252.6525
O32.42931.21782.26622.64972.57763.12323.12323.70502.63802.6380
O42.36031.35652.26621.44243.28262.62352.62352.01902.08582.0858
C53.69332.36072.64971.44244.48163.98723.98721.08581.08851.0885
H61.08642.12842.57763.28264.48161.78511.78515.28634.70164.7016
H71.09002.13603.12322.62353.98721.78511.76294.52264.22304.5790
H81.09002.13603.12322.62353.98721.78511.76294.52264.57904.2230
H94.37793.23593.70502.01901.08585.28634.52264.52261.79061.7906
H104.04252.65252.63802.08581.08854.70164.22304.57901.79061.7774
H114.04252.65252.63802.08581.08854.70164.57904.22301.79061.7774

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 125.803 C1 C2 O4 110.917
C2 C1 H6 109.233 C2 C1 H7 109.622
C2 C1 H8 109.622 C2 O4 C5 114.980
O3 C2 O4 123.279 O4 C5 H9 105.119
O4 C5 H10 110.220 O4 C5 H11 110.220
H6 C1 H7 110.209 H6 C1 H8 110.209
H7 C1 H8 107.928 H9 C5 H10 110.878
H9 C5 H11 110.878 H10 C5 H11 109.465
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability