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All results from a given calculation for C4H8O2 (Ethyl acetate)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-306.772876
Energy at 298.15K 
HF Energy-305.874369
Nuclear repulsion energy243.800720
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 MP3/6-31G*
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' 3241 3042 5.53      
2 A' 3195 2999 20.40      
3 A' 3128 2935 14.91      
4 A' 3125 2933 0.50      
5 A' 3114 2923 13.10      
6 A' 1908 1791 236.67      
7 A' 1584 1486 4.21      
8 A' 1559 1463 3.13      
9 A' 1535 1441 12.27      
10 A' 1492 1401 6.54      
11 A' 1467 1377 99.05      
12 A' 1441 1352 7.00      
13 A' 1351 1268 416.17      
14 A' 1185 1113 22.26      
15 A' 1136 1067 69.43      
16 A' 1054 989 5.85      
17 A' 988 928 6.47      
18 A' 902 847 9.64      
19 A' 660 620 10.28      
20 A' 440 413 0.88      
21 A' 383 360 10.47      
22 A' 202 190 5.36      
23 A" 3205 3008 30.59      
24 A" 3200 3004 4.30      
25 A" 3172 2978 9.93      
26 A" 1547 1452 5.86      
27 A" 1533 1439 8.82      
28 A" 1335 1253 0.52      
29 A" 1227 1152 5.07      
30 A" 1104 1037 7.16      
31 A" 839 787 0.35      
32 A" 617 579 7.42      
33 A" 276 259 1.07      
34 A" 155 146 4.96      
35 A" 89 83 0.23      
36 A" 72 68 0.56      

Unscaled Zero Point Vibrational Energy (zpe) 26729.9 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 25088.7 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 MP3/6-31G*
ABC
0.28132 0.07007 0.05792

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.309 0.027 0.000
C2 -0.905 -0.517 0.000
O3 0.000 0.483 0.000
O4 -0.604 -1.687 0.000
C5 1.379 0.062 0.000
C6 2.224 1.319 0.000
H7 -3.015 -0.803 0.000
H8 -2.463 0.653 0.883
H9 -2.463 0.653 -0.883
H10 1.562 -0.557 0.883
H11 1.562 -0.557 -0.883
H12 3.286 1.053 0.000
H13 2.016 1.922 -0.887
H14 2.016 1.922 0.887

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50572.35392.41753.68794.71401.08941.09321.09324.01334.01335.68834.80514.8051
C21.50571.34851.20862.35573.62782.12962.13882.13882.62062.62064.47503.90743.9074
O32.35391.34852.25301.44142.37613.27802.62162.62162.07392.07393.33482.63122.6312
O42.41751.20862.25302.64444.12772.56783.11623.11622.59842.59844.75844.54794.5479
C53.68792.35571.44142.64441.51464.47813.98543.98541.09381.09382.14922.15722.1572
C64.71403.62782.37614.12771.51465.65284.81564.81562.17602.17601.09421.09301.0930
H71.08942.12963.27802.56784.47815.65281.79031.79034.66814.66816.56865.79045.7904
H81.09322.13882.62163.11623.98544.81561.79031.76534.20264.55855.82954.98024.6551
H91.09322.13882.62163.11623.98544.81561.79031.76534.55854.20265.82954.65514.9802
H104.01332.62062.07392.59841.09382.17604.66814.20264.55851.76602.51833.07972.5202
H114.01332.62062.07392.59841.09382.17604.66814.55854.20261.76602.51832.52023.0797
H125.68834.47503.33484.75842.14921.09426.56865.82955.82952.51832.51831.77611.7761
H134.80513.90742.63124.54792.15721.09305.79044.98024.65513.07972.52021.77611.7743
H144.80513.90742.63124.54792.15721.09305.79044.65514.98022.52023.07971.77611.7743

picture of Ethyl acetate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 110.995 C1 C2 O4 125.551
C2 C1 H7 109.237 C2 C1 H8 109.738
C2 C1 H9 109.738 C2 O3 C5 115.168
O3 C2 O4 123.455 O3 C5 C6 106.967
O3 C5 H10 109.008 O3 C5 H11 109.008
C5 C6 H12 109.895 C5 C6 H13 110.594
C5 C6 H14 110.594 C6 C5 H10 112.065
C6 C5 H11 112.065 H7 C1 H8 110.216
H7 C1 H9 110.216 H8 C1 H9 107.679
H10 C5 H11 107.667 H12 C6 H13 108.593
H12 C6 H14 108.593 H13 C6 H14 108.514
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability