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

using model chemistry: MP2/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-58.481602
Energy at 298.15K 
HF Energy-57.876178
Nuclear repulsion energy132.292402
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/CEP-121G
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' 3136 3061 12.94 58.07 0.74 0.85
2 A' 3086 3012 35.55 65.84 0.75 0.85
3 A' 3016 2943 19.92 108.23 0.07 0.14
4 A' 3002 2930 7.65 141.30 0.00 0.00
5 A' 2982 2910 25.78 122.78 0.02 0.04
6 A' 1620 1581 141.85 7.34 0.37 0.54
7 A' 1538 1501 6.38 1.50 0.53 0.69
8 A' 1522 1486 4.40 20.83 0.73 0.84
9 A' 1508 1472 28.58 14.91 0.68 0.81
10 A' 1457 1423 7.66 2.72 0.70 0.83
11 A' 1450 1415 28.00 2.02 0.73 0.85
12 A' 1413 1380 5.88 3.42 0.74 0.85
13 A' 1236 1206 365.85 0.76 0.28 0.44
14 A' 1135 1108 2.24 11.59 0.17 0.29
15 A' 1051 1025 169.27 6.82 0.41 0.58
16 A' 1020 995 7.71 4.54 0.34 0.50
17 A' 906 885 43.43 2.31 0.59 0.74
18 A' 795 776 22.78 17.19 0.21 0.35
19 A' 605 590 8.36 12.17 0.33 0.49
20 A' 409 399 0.39 0.92 0.64 0.78
21 A' 347 339 7.73 4.59 0.33 0.50
22 A' 181 177 5.84 0.42 0.65 0.79
23 A" 3111 3037 60.36 10.25 0.75 0.86
24 A" 3107 3032 10.23 51.09 0.75 0.86
25 A" 3084 3010 2.95 86.35 0.75 0.86
26 A" 1513 1476 6.95 13.56 0.75 0.86
27 A" 1498 1462 11.26 13.43 0.75 0.86
28 A" 1277 1247 0.05 11.33 0.75 0.86
29 A" 1178 1150 5.21 5.33 0.75 0.86
30 A" 1085 1059 2.64 1.18 0.75 0.86
31 A" 818 799 0.27 0.15 0.75 0.86
32 A" 554 541 5.88 1.71 0.75 0.86
33 A" 250 244 1.86 0.04 0.75 0.86
34 A" 146 143 8.20 0.00 0.75 0.86
35 A" 62 61 0.10 0.49 0.75 0.86
36 A" 47 46 1.04 0.16 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25573.1 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 24959.3 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/CEP-121G
ABC
0.26260 0.06568 0.05417

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.377 0.007 0.000
C2 -0.949 -0.545 0.000
O3 0.000 0.504 0.000
O4 -0.614 -1.767 0.000
C5 1.452 0.082 0.000
C6 2.270 1.391 0.000
H7 -3.082 -0.834 0.000
H8 -2.533 0.634 0.891
H9 -2.533 0.634 -0.891
H10 1.628 -0.532 0.897
H11 1.628 -0.532 -0.897
H12 3.347 1.150 0.000
H13 2.040 1.988 -0.895
H14 2.040 1.988 0.895

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.53102.42812.50033.82974.84831.09731.10031.10034.13944.13945.83694.92254.9225
C21.53101.41421.26642.48143.75592.15272.16642.16642.72862.72864.61824.01854.0185
O32.42811.41422.35181.51212.43713.35962.68822.68822.12802.12803.40892.67682.6768
O42.50031.26642.35182.77264.27632.63803.19953.19952.71242.71244.91934.68404.6840
C53.82972.48141.51212.77261.54314.62574.12064.12061.10131.10132.17522.18602.1860
C64.84833.75592.43714.27631.54315.79584.94314.94312.21662.21661.10361.10061.1006
H71.09732.15273.35962.63804.62575.79581.80251.80254.80434.80436.72825.91575.9157
H81.10032.16642.68823.19954.12064.94311.80251.78114.32164.67675.96955.09254.7690
H91.10032.16642.68823.19954.12064.94311.80251.78114.67674.32165.96954.76905.0925
H104.13942.72862.12802.71241.10132.21664.80434.32164.67671.79402.56693.11952.5531
H114.13942.72862.12802.71241.10132.21664.80434.67674.32161.79402.56692.55313.1195
H125.83694.61823.40894.91932.17521.10366.72825.96955.96952.56692.56691.79221.7922
H134.92254.01852.67684.68402.18601.10065.91575.09254.76903.11952.55311.79221.7909
H144.92254.01852.67684.68402.18601.10065.91574.76905.09252.55313.11951.79221.7909

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 111.002 C1 C2 O4 126.446
C2 C1 H7 108.854 C2 C1 H8 109.752
C2 C1 H9 109.752 C2 O3 C5 115.950
O3 C2 O4 122.552 O3 C5 C6 105.817
O3 C5 H10 108.000 O3 C5 H11 108.000
C5 C6 H12 109.425 C5 C6 H13 110.439
C5 C6 H14 110.439 C6 C5 H10 112.842
C6 C5 H11 112.842 H7 C1 H8 110.205
H7 C1 H9 110.205 H8 C1 H9 108.066
H10 C5 H11 109.077 H12 C6 H13 108.797
H12 C6 H14 108.797 H13 C6 H14 108.905
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability