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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-306.342098
Energy at 298.15K 
HF Energy-305.724220
Nuclear repulsion energy238.425336
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' 3200 3062 8.00 60.36 0.73 0.84
2 A' 3158 3022 23.30 63.94 0.75 0.86
3 A' 3092 2959 13.28 83.59 0.11 0.20
4 A' 3087 2954 2.67 113.76 0.00 0.01
5 A' 3074 2941 16.42 97.14 0.03 0.06
6 A' 1687 1614 121.40 5.19 0.38 0.55
7 A' 1587 1519 4.78 2.09 0.74 0.85
8 A' 1572 1504 4.85 27.00 0.74 0.85
9 A' 1553 1486 22.21 18.87 0.74 0.85
10 A' 1491 1426 7.69 5.64 0.71 0.83
11 A' 1476 1412 24.44 3.43 0.73 0.84
12 A' 1443 1380 3.09 3.76 0.72 0.84
13 A' 1275 1220 377.94 0.76 0.64 0.78
14 A' 1166 1115 3.99 8.49 0.22 0.37
15 A' 1076 1029 145.56 5.16 0.35 0.52
16 A' 1048 1002 2.78 3.27 0.47 0.64
17 A' 934 894 35.91 1.63 0.59 0.74
18 A' 821 785 15.51 15.41 0.25 0.40
19 A' 632 605 7.79 10.64 0.34 0.51
20 A' 425 406 0.51 0.87 0.63 0.77
21 A' 360 344 8.67 3.86 0.36 0.53
22 A' 187 179 5.72 0.39 0.66 0.79
23 A" 3179 3042 35.91 22.23 0.75 0.86
24 A" 3172 3035 5.69 54.36 0.75 0.86
25 A" 3145 3010 10.18 74.00 0.75 0.86
26 A" 1561 1494 5.89 22.63 0.75 0.86
27 A" 1550 1483 9.83 20.05 0.75 0.86
28 A" 1324 1267 0.01 12.72 0.75 0.86
29 A" 1211 1159 5.14 5.41 0.75 0.86
30 A" 1115 1066 5.64 1.54 0.75 0.86
31 A" 851 814 0.56 0.10 0.75 0.86
32 A" 582 557 6.76 1.67 0.75 0.86
33 A" 264 253 1.83 0.01 0.75 0.86
34 A" 150 144 7.60 0.00 0.75 0.86
35 A" 84 81 0.69 0.19 0.75 0.86
36 A" 52 50 0.28 0.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26290.0 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 25154.3 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
0.26836 0.06694 0.05525

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 -2.349 0.012 0.000
C2 -0.940 -0.537 0.000
O3 0.000 0.497 0.000
O4 -0.618 -1.746 0.000
C5 1.438 0.080 0.000
C6 2.252 1.371 0.000
H7 -3.055 -0.824 0.000
H8 -2.509 0.636 0.888
H9 -2.509 0.636 -0.888
H10 1.620 -0.537 0.889
H11 1.620 -0.537 -0.889
H12 3.325 1.135 0.000
H13 2.023 1.969 -0.891
H14 2.023 1.969 0.891

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.51232.39892.46793.78814.79761.09411.09691.09694.10484.10485.78494.87264.8726
C21.51231.39691.25202.45673.71822.13442.15062.15062.71032.71034.58143.98133.9813
O32.39891.39692.32651.49732.41543.32842.66502.66502.11742.11743.38612.65582.6558
O42.46791.25202.32652.74954.23662.60603.16903.16902.69482.69484.88384.64414.6441
C53.78812.45671.49732.74951.52614.58314.08374.08371.09711.09712.16252.16882.1688
C64.79763.71822.41544.23661.52615.74274.89804.89802.19722.19721.09911.09661.0966
H71.09412.13443.32842.60604.58315.74271.79431.79434.76774.76776.67455.86365.8636
H81.09692.15062.66503.16904.08374.89801.79431.77514.29254.64585.92255.04754.7240
H91.09692.15062.66503.16904.08374.89801.79431.77514.64584.29255.92254.72405.0475
H104.10482.71032.11742.69481.09712.19724.76774.29254.64581.77862.54833.09942.5374
H114.10482.71032.11742.69481.09712.19724.76774.64584.29251.77862.54832.53743.0994
H125.78494.58143.38614.88382.16251.09916.67455.92255.92252.54832.54831.78391.7839
H134.87263.98132.65584.64412.16881.09665.86365.04754.72403.09942.53741.78391.7810
H144.87263.98132.65584.64412.16881.09665.86364.72405.04752.53743.09941.78391.7810

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 111.030 C1 C2 O4 126.192
C2 C1 H7 108.892 C2 C1 H8 110.001
C2 C1 H9 110.001 C2 O3 C5 116.124
O3 C2 O4 122.777 O3 C5 C6 106.044
O3 C5 H10 108.412 O3 C5 H11 108.412
C5 C6 H12 109.853 C5 C6 H13 110.499
C5 C6 H14 110.499 C6 C5 H10 112.748
C6 C5 H11 112.748 H7 C1 H8 109.959
H7 C1 H9 109.959 H8 C1 H9 108.021
H10 C5 H11 108.302 H12 C6 H13 108.672
H12 C6 H14 108.672 H13 C6 H14 108.596
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability