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

using model chemistry: MP2/SDD

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/SDD
 hartrees
Energy at 0K-306.370627
Energy at 298.15K 
HF Energy-305.773636
Nuclear repulsion energy236.619167
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/SDD
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' 3181 3070 13.15 53.18 0.73 0.84
2 A' 3135 3026 33.54 54.91 0.75 0.85
3 A' 3067 2961 21.34 95.31 0.07 0.13
4 A' 3049 2943 7.10 134.89 0.00 0.00
5 A' 3034 2929 24.85 125.15 0.02 0.04
6 A' 1639 1582 150.88 7.00 0.32 0.49
7 A' 1548 1494 8.58 0.90 0.63 0.78
8 A' 1540 1487 3.17 19.40 0.70 0.83
9 A' 1521 1468 31.37 14.40 0.71 0.83
10 A' 1465 1414 10.97 2.19 0.65 0.79
11 A' 1456 1405 31.07 1.52 0.68 0.81
12 A' 1420 1371 4.88 3.58 0.75 0.86
13 A' 1236 1193 359.20 1.85 0.41 0.58
14 A' 1144 1105 4.20 12.36 0.22 0.36
15 A' 1054 1017 165.34 7.07 0.47 0.64
16 A' 1026 991 9.28 4.90 0.34 0.51
17 A' 913 881 38.97 2.22 0.72 0.84
18 A' 796 768 21.78 16.70 0.20 0.34
19 A' 610 588 8.50 12.15 0.33 0.49
20 A' 411 397 0.27 0.83 0.62 0.77
21 A' 349 337 8.48 4.27 0.37 0.54
22 A' 181 175 6.02 0.43 0.66 0.80
23 A" 3159 3050 57.00 10.00 0.75 0.86
24 A" 3151 3042 10.37 45.80 0.75 0.86
25 A" 3134 3025 4.20 69.49 0.75 0.86
26 A" 1527 1474 8.20 14.02 0.75 0.86
27 A" 1520 1467 12.67 13.41 0.75 0.86
28 A" 1297 1252 0.01 14.79 0.75 0.86
29 A" 1189 1147 5.93 4.06 0.75 0.86
30 A" 1104 1066 5.93 2.80 0.75 0.86
31 A" 842 812 1.15 0.16 0.75 0.86
32 A" 569 549 6.35 1.88 0.75 0.86
33 A" 254 245 1.88 0.04 0.75 0.86
34 A" 149 144 8.95 0.00 0.75 0.86
35 A" 63 61 0.04 0.61 0.75 0.86
36 A" 38 37 0.85 0.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25882.6 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 24984.5 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/SDD
ABC
0.26293 0.06599 0.05440

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.366 0.012 0.000
C2 -0.947 -0.550 0.000
O3 0.000 0.494 0.000
O4 -0.618 -1.766 0.000
C5 1.453 0.083 0.000
C6 2.260 1.394 0.000
H7 -3.085 -0.820 0.000
H8 -2.516 0.642 0.892
H9 -2.516 0.642 -0.892
H10 1.636 -0.532 0.897
H11 1.636 -0.532 -0.897
H12 3.340 1.163 0.000
H13 2.026 1.991 -0.896
H14 2.026 1.991 0.896

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.52622.41442.49323.81954.82751.09941.10201.10204.13744.13745.82124.89964.8996
C21.52621.40921.25972.48193.74992.15512.16312.16312.73462.73464.61694.01224.0122
O32.41441.40922.34271.50992.43243.35292.67392.67392.12922.12923.40682.67392.6739
O42.49321.25972.34272.77634.27422.64243.19313.19312.72242.72244.92444.68094.6809
C53.81952.48191.50992.77631.53974.62694.10664.10661.10281.10282.17472.18502.1850
C64.82753.74992.43244.27421.53975.78504.91654.91652.21412.21411.10531.10231.1023
H71.09942.15513.35292.64244.62695.78501.80371.80374.81464.81466.72445.90115.9011
H81.10202.16312.67393.19314.10664.91651.80371.78364.31534.67155.94735.06464.7384
H91.10202.16312.67393.19314.10664.91651.80371.78364.67154.31535.94734.73845.0646
H104.13742.73462.12922.72241.10282.21414.81464.31534.67151.79442.56533.12002.5528
H114.13742.73462.12922.72241.10282.21414.81464.67154.31531.79442.56532.55283.1200
H125.82124.61693.40684.92442.17471.10536.72445.94735.94732.56532.56531.79401.7940
H134.89964.01222.67394.68092.18501.10235.90115.06464.73843.12002.55281.79401.7930
H144.89964.01222.67394.68092.18501.10235.90114.73845.06462.55283.12001.79401.7930

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 110.606 C1 C2 O4 126.738
C2 C1 H7 109.254 C2 C1 H8 109.723
C2 C1 H9 109.723 C2 O3 C5 116.426
O3 C2 O4 122.656 O3 C5 C6 105.802
O3 C5 H10 108.155 O3 C5 H11 108.155
C5 C6 H12 109.520 C5 C6 H13 110.501
C5 C6 H14 110.501 C6 C5 H10 112.797
C6 C5 H11 112.797 H7 C1 H8 110.039
H7 C1 H9 110.039 H8 C1 H9 108.048
H10 C5 H11 108.899 H12 C6 H13 108.715
H12 C6 H14 108.715 H13 C6 H14 108.846
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability