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 C4H8O2 (Ethyl acetate)

using model chemistry: MP2=FULL/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=FULL/STO-3G
 hartrees
Energy at 0K-302.293946
Energy at 298.15K 
HF Energy-301.967243
Nuclear repulsion energy237.032100
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=FULL/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' 3566 3170 0.20 29.31 0.75 0.85
2 A' 3562 3166 1.17 31.25 0.74 0.85
3 A' 3382 3006 1.23 37.32 0.01 0.03
4 A' 3376 3001 0.06 37.16 0.01 0.01
5 A' 3350 2978 6.42 28.18 0.16 0.28
6 A' 1838 1633 54.46 1.19 0.62 0.76
7 A' 1735 1542 2.38 3.52 0.74 0.85
8 A' 1710 1520 3.38 27.05 0.73 0.85
9 A' 1706 1516 6.51 10.42 0.75 0.86
10 A' 1615 1435 0.42 6.40 0.69 0.82
11 A' 1584 1408 3.01 3.97 0.73 0.84
12 A' 1534 1364 22.92 1.57 0.75 0.85
13 A' 1362 1211 269.31 3.45 0.35 0.52
14 A' 1260 1120 7.94 4.65 0.26 0.42
15 A' 1191 1059 2.91 4.92 0.74 0.85
16 A' 1097 975 14.11 2.17 0.21 0.35
17 A' 1010 897 2.33 3.60 0.69 0.81
18 A' 916 815 7.72 5.02 0.18 0.31
19 A' 625 556 9.08 7.79 0.36 0.53
20 A' 413 368 0.13 0.29 0.75 0.86
21 A' 367 326 4.46 2.48 0.41 0.58
22 A' 194 173 1.87 0.14 0.52 0.69
23 A" 3566 3170 1.67 21.33 0.75 0.86
24 A" 3555 3160 0.15 26.24 0.75 0.86
25 A" 3456 3072 8.30 24.13 0.75 0.86
26 A" 1720 1529 1.19 17.45 0.75 0.86
27 A" 1707 1517 2.08 16.59 0.75 0.86
28 A" 1405 1249 0.07 13.21 0.75 0.86
29 A" 1264 1123 6.47 2.99 0.75 0.86
30 A" 1141 1014 4.71 1.24 0.75 0.86
31 A" 885 787 0.18 0.02 0.75 0.86
32 A" 547 487 3.90 0.66 0.75 0.86
33 A" 228 203 0.87 0.01 0.75 0.86
34 A" 143 127 2.27 0.01 0.75 0.86
35 A" 76 68 0.02 0.18 0.75 0.86
36 A" 60 54 0.03 0.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 28571.5 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 25397.2 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=FULL/STO-3G
ABC
0.26322 0.06682 0.05498

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/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 1.543 -0.615 0.896
H11 1.543 -0.615 -0.896
H12 3.393 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
C11.56292.43332.52653.75834.87421.10271.10341.10344.09384.09385.83314.99054.9905
C21.56291.42141.25662.37123.72302.19412.20322.20322.64482.64484.54814.02564.0256
O32.43331.42142.36441.47232.44523.38042.70022.70022.13892.13893.40742.70062.7006
O42.52651.25662.36442.64834.19232.68843.22763.22762.59232.59234.78124.64094.6409
C53.75832.37121.47232.64831.55864.55704.07384.07381.11451.11452.19412.20172.2017
C64.87423.72302.44524.19231.55865.81655.00155.00152.20932.20931.10321.10281.1028
H71.10272.19413.38042.68844.55705.81651.79791.79794.75484.75486.71145.98095.9809
H81.10342.20322.70023.22764.07385.00151.79791.78974.29924.65726.00505.18994.8713
H91.10342.20322.70023.22764.07385.00151.79791.78974.65724.29926.00504.87135.1899
H104.09382.64482.13892.59231.11452.20934.75484.29924.65721.79192.53803.12362.5589
H114.09382.64482.13892.59231.11452.20934.75484.65724.29921.79192.53802.55893.1236
H125.83314.54813.40744.78122.19411.10326.71146.00506.00502.53802.53801.79251.7925
H134.99054.02562.70064.64092.20171.10285.98095.18994.87133.12362.55891.79251.7910
H144.99054.02562.70064.64092.20171.10285.98094.87135.18992.55893.12361.79251.7910

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 109.156 C1 C2 O4 126.968
C2 C1 H7 109.587 C2 C1 H8 110.254
C2 C1 H9 110.254 C2 O3 C5 110.044
O3 C2 O4 123.877 O3 C5 C6 107.530
O3 C5 H10 110.795 O3 C5 H11 110.795
C5 C6 H12 109.858 C5 C6 H13 110.474
C5 C6 H14 110.474 C6 C5 H10 110.374
C6 C5 H11 110.374 H7 C1 H8 109.166
H7 C1 H9 109.166 H8 C1 H9 108.384
H10 C5 H11 107.001 H12 C6 H13 108.697
H12 C6 H14 108.697 H13 C6 H14 108.593
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability