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

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-306.807608
Energy at 298.15K 
HF Energy-305.885899
Nuclear repulsion energy243.445490
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 MP2/6-31G**
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' 3279 3071 5.43 57.37 0.72 0.84
2 A' 3238 3033 17.79 63.31 0.74 0.85
3 A' 3152 2951 4.24 73.56 0.00 0.00
4 A' 3149 2949 13.89 106.15 0.07 0.13
5 A' 3141 2942 12.98 96.41 0.01 0.03
6 A' 1831 1715 182.04 5.70 0.36 0.53
7 A' 1577 1477 3.55 0.80 0.75 0.86
8 A' 1558 1459 2.28 21.69 0.75 0.86
9 A' 1532 1435 11.13 14.31 0.74 0.85
10 A' 1480 1386 4.41 4.70 0.75 0.86
11 A' 1452 1360 59.85 2.22 0.75 0.86
12 A' 1429 1338 10.33 2.30 0.63 0.78
13 A' 1312 1229 412.80 0.26 0.70 0.82
14 A' 1173 1098 10.17 7.32 0.17 0.29
15 A' 1115 1045 89.47 3.23 0.67 0.81
16 A' 1042 976 9.38 1.66 0.24 0.39
17 A' 972 911 7.95 2.03 0.29 0.44
18 A' 881 825 12.43 10.21 0.28 0.44
19 A' 647 606 7.95 7.60 0.33 0.50
20 A' 434 406 0.61 0.37 0.72 0.84
21 A' 375 351 9.32 2.58 0.33 0.49
22 A' 199 186 4.82 0.28 0.63 0.77
23 A" 3250 3044 25.18 29.52 0.75 0.86
24 A" 3244 3038 4.17 51.49 0.75 0.86
25 A" 3207 3003 13.79 62.14 0.75 0.86
26 A" 1547 1449 4.69 18.06 0.75 0.86
27 A" 1536 1439 7.16 15.45 0.75 0.86
28 A" 1327 1243 0.45 10.53 0.75 0.86
29 A" 1218 1141 4.47 2.01 0.75 0.86
30 A" 1091 1022 5.04 0.82 0.75 0.86
31 A" 834 781 0.25 0.17 0.75 0.86
32 A" 603 565 5.93 1.38 0.75 0.86
33 A" 281 264 1.01 0.01 0.75 0.86
34 A" 157 147 4.46 0.01 0.75 0.86
35 A" 74 69 0.03 0.32 0.75 0.86
36 A" 62 58 0.75 0.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26701.0 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 25005.5 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 MP2/6-31G**
ABC
0.27873 0.07012 0.05783

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.309 0.039 0.000
C2 -0.910 -0.514 0.000
O3 0.000 0.494 0.000
O4 -0.608 -1.696 0.000
C5 1.379 0.058 0.000
C6 2.230 1.306 0.000
H7 -3.018 -0.781 0.000
H8 -2.457 0.663 0.879
H9 -2.457 0.663 -0.879
H10 1.555 -0.560 0.880
H11 1.555 -0.560 -0.880
H12 3.285 1.035 0.000
H13 2.027 1.907 -0.883
H14 2.027 1.907 0.883

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50452.35302.42933.68774.71201.08471.08801.08804.00754.00755.68134.80224.8022
C21.50451.35821.21912.35923.62902.12572.13362.13362.61722.61724.47123.90683.9068
O32.35301.35822.27271.44642.37313.27682.61452.61452.07462.07463.32902.62352.6235
O42.42931.21912.27272.65034.13062.57823.12313.12312.59642.59644.75464.54954.5495
C53.68772.35921.44642.65031.51004.47693.98133.98131.08981.08982.14122.14872.1487
C64.71203.62902.37314.13061.51005.64814.81154.81152.17062.17061.08911.08781.0878
H71.08472.12573.27682.57824.47695.64811.78151.78154.66254.66256.55955.78425.7842
H81.08802.13362.61453.12313.98134.81151.78151.75804.19384.54775.82024.97514.6525
H91.08802.13362.61453.12313.98134.81151.78151.75804.54774.19385.82024.65254.9751
H104.00752.61722.07462.59641.08982.17064.66254.19384.54771.75982.51193.06892.5117
H114.00752.61722.07462.59641.08982.17064.66254.54774.19381.75982.51192.51173.0689
H125.68134.47123.32904.75462.14121.08916.55955.82025.82022.51192.51191.76781.7678
H134.80223.90682.62354.54952.14871.08785.78424.97514.65253.06892.51171.76781.7667
H144.80223.90682.62354.54952.14871.08785.78424.65254.97512.51173.06891.76781.7667

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 110.452 C1 C2 O4 125.914
C2 C1 H7 109.291 C2 C1 H8 109.724
C2 C1 H9 109.724 C2 O3 C5 114.496
O3 C2 O4 123.634 O3 C5 C6 106.759
O3 C5 H10 108.961 O3 C5 H11 108.961
C5 C6 H12 109.879 C5 C6 H13 110.555
C5 C6 H14 110.555 C6 C5 H10 112.204
C6 C5 H11 112.204 H7 C1 H8 110.152
H7 C1 H9 110.152 H8 C1 H9 107.780
H10 C5 H11 107.682 H12 C6 H13 108.596
H12 C6 H14 108.596 H13 C6 H14 108.605
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability