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

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-302.291964
Energy at 298.15K 
HF Energy-301.967179
Nuclear repulsion energy237.005257
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/STO-3G
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' 3565 3109 0.21 29.32 0.75 0.85
2 A' 3561 3105 1.18 31.27 0.74 0.85
3 A' 3381 2948 1.24 37.32 0.01 0.03
4 A' 3376 2943 0.06 37.17 0.01 0.01
5 A' 3349 2920 6.42 28.22 0.16 0.28
6 A' 1837 1602 54.46 1.19 0.62 0.76
7 A' 1734 1512 2.37 3.54 0.74 0.85
8 A' 1710 1491 3.38 27.12 0.73 0.85
9 A' 1705 1487 6.52 10.33 0.75 0.86
10 A' 1614 1408 0.41 6.39 0.69 0.82
11 A' 1584 1381 2.98 3.96 0.73 0.84
12 A' 1534 1338 22.94 1.57 0.75 0.85
13 A' 1362 1188 269.42 3.45 0.35 0.52
14 A' 1260 1098 7.93 4.65 0.26 0.42
15 A' 1191 1038 2.94 4.93 0.74 0.85
16 A' 1097 956 14.15 2.18 0.21 0.35
17 A' 1009 880 2.33 3.60 0.69 0.81
18 A' 916 799 7.71 5.02 0.18 0.31
19 A' 625 545 9.08 7.80 0.36 0.53
20 A' 413 360 0.13 0.29 0.75 0.86
21 A' 367 320 4.46 2.48 0.41 0.58
22 A' 194 169 1.87 0.14 0.53 0.69
23 A" 3565 3108 1.68 21.33 0.75 0.86
24 A" 3554 3099 0.15 26.25 0.75 0.86
25 A" 3455 3013 8.31 24.15 0.75 0.86
26 A" 1719 1499 1.19 17.45 0.75 0.86
27 A" 1707 1488 2.08 16.60 0.75 0.86
28 A" 1405 1225 0.07 13.22 0.75 0.86
29 A" 1263 1102 6.47 2.99 0.75 0.86
30 A" 1141 995 4.70 1.24 0.75 0.86
31 A" 885 771 0.18 0.02 0.75 0.86
32 A" 547 477 3.91 0.66 0.75 0.86
33 A" 228 199 0.87 0.01 0.75 0.86
34 A" 143 125 2.27 0.01 0.75 0.86
35 A" 76 66 0.02 0.19 0.75 0.86
36 A" 60 53 0.03 0.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 28566.2 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 24906.9 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/STO-3G
ABC
0.26315 0.06681 0.05497

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.388 0.095 0.000
C2 -0.942 -0.500 0.000
O3 0.000 0.564 0.000
O4 -0.626 -1.716 0.000
C5 1.370 0.025 0.000
C6 2.351 1.236 0.000
H7 -3.125 -0.725 0.000
H8 -2.543 0.721 0.895
H9 -2.543 0.721 -0.895
H10 1.544 -0.615 0.896
H11 1.544 -0.615 -0.896
H12 3.394 0.874 0.000
H13 2.194 1.860 -0.896
H14 2.194 1.860 0.896

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.56322.43362.52693.75874.87481.10281.10351.10354.09434.09435.83384.99114.9911
C21.56321.42151.25662.37143.72342.19442.20352.20352.64502.64504.54864.02604.0260
O32.43361.42152.36461.47252.44563.38072.70052.70052.13912.13913.40772.70092.7009
O42.52691.25662.36462.64864.19282.68873.22793.22792.59262.59264.78174.64144.6414
C53.75872.37141.47252.64861.55894.55754.07424.07421.11461.11462.19442.20202.2020
C64.87483.72342.44564.19281.55895.81725.00215.00212.20962.20961.10331.10291.1029
H71.10282.19443.38072.68874.55755.81721.79811.79814.75534.75536.71215.98155.9815
H81.10352.20352.70053.22794.07425.00211.79811.78994.29964.65776.00565.19034.8717
H91.10352.20352.70053.22794.07425.00211.79811.78994.65774.29966.00564.87175.1903
H104.09432.64502.13912.59261.11462.20964.75534.29964.65771.79212.53833.12402.5592
H114.09432.64502.13912.59261.11462.20964.75534.65774.29961.79212.53832.55923.1240
H125.83384.54863.40774.78172.19441.10336.71216.00566.00562.53832.53831.79271.7927
H134.99114.02602.70094.64142.20201.10295.98155.19034.87173.12402.55921.79271.7912
H144.99114.02602.70094.64142.20201.10295.98154.87175.19032.55923.12401.79271.7912

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 109.152 C1 C2 O4 126.968
C2 C1 H7 109.583 C2 C1 H8 110.249
C2 C1 H9 110.249 C2 O3 C5 110.041
O3 C2 O4 123.880 O3 C5 C6 107.525
O3 C5 H10 110.794 O3 C5 H11 110.794
C5 C6 H12 109.853 C5 C6 H13 110.469
C5 C6 H14 110.469 C6 C5 H10 110.373
C6 C5 H11 110.373 H7 C1 H8 109.171
H7 C1 H9 109.171 H8 C1 H9 108.389
H10 C5 H11 107.009 H12 C6 H13 108.702
H12 C6 H14 108.702 H13 C6 H14 108.597
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability