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

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-51.748594
Energy at 298.15K-51.755190
HF Energy-51.232022
Nuclear repulsion energy98.024972
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 MP2/CEP-121G
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' 3167 3091 18.02      
2 A' 3138 3063 11.85      
3 A' 3004 2932 38.56      
4 A' 3003 2931 2.47      
5 A' 1627 1588 141.04      
6 A' 1524 1488 7.27      
7 A' 1509 1473 26.63      
8 A' 1477 1442 9.68      
9 A' 1451 1416 23.36      
10 A' 1241 1212 300.92      
11 A' 1191 1163 10.33      
12 A' 1051 1026 113.83      
13 A' 956 933 23.28      
14 A' 776 757 37.15      
15 A' 609 595 7.94      
16 A' 404 394 4.57      
17 A' 263 257 13.72      
18 A" 3124 3049 31.07      
19 A" 3109 3034 11.69      
20 A" 1504 1468 7.05      
21 A" 1497 1461 11.63      
22 A" 1151 1123 1.91      
23 A" 1087 1061 3.01      
24 A" 555 542 6.81      
25 A" 175 171 12.54      
26 A" 128 125 0.78      
27 A" 50 48 0.82      

Unscaled Zero Point Vibrational Energy (zpe) 19385.5 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 18920.2 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 MP2/CEP-121G
ABC
0.31640 0.12988 0.09545

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.131 1.560 0.000
C2 0.000 0.528 0.000
O3 -1.243 0.767 0.000
O4 0.519 -0.790 0.000
C5 -0.506 -1.888 0.000
H6 0.692 2.565 0.000
H7 1.761 1.420 0.891
H8 1.761 1.420 -0.891
H9 0.094 -2.803 0.000
H10 -1.132 -1.811 0.900
H11 -1.132 -1.811 -0.900

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.53072.50222.42843.81631.09711.10021.10024.48404.15814.1581
C21.53071.26561.41642.46822.15152.16582.16583.33202.74982.7498
O32.50221.26562.35122.75562.64083.20053.20053.81232.73332.7333
O42.42841.41642.35121.50153.35982.68742.68742.05692.13902.1390
C53.81632.46822.75561.50154.61124.10794.10791.09421.09881.0988
H61.09712.15152.64083.35984.61121.80251.80255.40114.82554.8255
H71.10022.16583.20052.68744.10791.80251.78124.62644.33684.6919
H81.10022.16583.20052.68744.10791.80251.78124.62644.69194.3368
H94.48403.33203.81232.05691.09425.40114.62644.62641.81551.8155
H104.15812.74982.73332.13901.09884.82554.33684.69191.81551.8001
H114.15812.74982.73332.13901.09884.82554.69194.33681.81551.8001

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 126.709 C1 C2 O4 110.908
C2 C1 H6 108.793 C2 C1 H7 109.736
C2 C1 H8 109.736 C2 O4 C5 115.500
O3 C2 O4 122.383 O4 C5 H9 103.716
O4 C5 H10 109.717 O4 C5 H11 109.717
H6 C1 H7 110.234 H6 C1 H8 110.234
H7 C1 H8 108.099 H9 C5 H10 111.760
H9 C5 H11 111.760 H10 C5 H11 109.990
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability