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/daug-cc-pVDZ

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/daug-cc-pVDZ
 hartrees
Energy at 0K-306.909200
Energy at 298.15K 
HF Energy-305.915626
Nuclear repulsion energy242.498091
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/daug-cc-pVDZ
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' 3217 3217 4.95 51.99 0.70 0.82
2 A' 3171 3171 18.06 60.97 0.72 0.84
3 A' 3093 3093 17.04 77.42 0.06 0.11
4 A' 3088 3088 1.54 193.46 0.00 0.00
5 A' 3075 3075 15.10 179.38 0.01 0.01
6 A' 1768 1768 227.83 12.70 0.24 0.39
7 A' 1509 1509 5.31 0.85 0.69 0.82
8 A' 1489 1489 2.53 7.16 0.75 0.85
9 A' 1465 1465 13.30 5.85 0.61 0.76
10 A' 1419 1419 4.74 1.12 0.60 0.75
11 A' 1392 1392 70.88 0.10 0.75 0.85
12 A' 1372 1372 11.62 0.54 0.51 0.67
13 A' 1266 1266 384.52 0.98 0.75 0.86
14 A' 1139 1139 4.06 9.75 0.09 0.17
15 A' 1086 1086 105.90 2.69 0.60 0.75
16 A' 1010 1010 12.67 1.72 0.15 0.25
17 A' 954 954 12.60 2.52 0.12 0.22
18 A' 854 854 12.48 8.75 0.16 0.28
19 A' 638 638 6.63 8.22 0.19 0.32
20 A' 424 424 0.71 0.33 0.66 0.79
21 A' 367 367 8.09 3.29 0.21 0.34
22 A' 196 196 5.25 0.37 0.51 0.68
23 A" 3182 3182 27.95 18.21 0.75 0.86
24 A" 3178 3178 3.60 48.27 0.75 0.86
25 A" 3151 3151 5.81 68.41 0.75 0.86
26 A" 1480 1480 6.51 4.77 0.75 0.86
27 A" 1474 1474 7.27 4.43 0.75 0.86
28 A" 1288 1288 1.10 3.46 0.75 0.86
29 A" 1175 1175 3.14 0.40 0.75 0.86
30 A" 1054 1054 3.53 0.04 0.75 0.86
31 A" 807 807 0.44 0.22 0.75 0.86
32 A" 601 601 4.10 0.34 0.75 0.86
33 A" 263 263 0.99 0.01 0.75 0.86
34 A" 156 156 4.77 0.02 0.75 0.86
35 A" 77 77 0.26 0.21 0.75 0.86
36 A" 40 40 0.39 0.09 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25957.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 25957.4 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/daug-cc-pVDZ
ABC
0.27741 0.06956 0.05743

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/daug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.318 0.043 0.000
C2 -0.915 -0.512 0.000
O3 0.000 0.496 0.000
O4 -0.614 -1.695 0.000
C5 1.384 0.054 0.000
C6 2.244 1.303 0.000
H7 -3.035 -0.783 0.000
H8 -2.465 0.674 0.887
H9 -2.465 0.674 -0.887
H10 1.555 -0.568 0.890
H11 1.555 -0.568 -0.890
H12 3.306 1.017 0.000
H13 2.046 1.911 -0.893
H14 2.046 1.911 0.893

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50802.36132.43413.70124.73201.09431.09841.09844.02024.02025.70684.82984.8298
C21.50801.36101.22142.36743.64292.13732.14352.14352.62612.62614.48913.92873.9287
O32.36131.36102.27531.45252.38443.29362.62592.62592.08372.08373.34642.64322.6432
O42.43411.22142.27532.65514.14162.58763.13493.13492.60092.60094.76644.56904.5690
C53.70122.36741.45252.65511.51624.49743.99803.99801.09921.09922.14972.16432.1643
C64.73203.64292.38444.14161.51625.67604.83274.83272.18342.18341.09951.09831.0983
H71.09432.13733.29362.58764.49745.67601.79841.79844.68054.68056.59135.82015.8201
H81.09842.14352.62593.13493.99804.83271.79841.77404.20774.56745.84855.00494.6777
H91.09842.14352.62593.13493.99804.83271.79841.77404.56744.20775.84854.67775.0049
H104.02022.62612.08372.60091.09922.18344.68054.20774.56741.77932.52403.09292.5274
H114.02022.62612.08372.60091.09922.18344.68054.56744.20771.77932.52402.52743.0929
H125.70684.48913.34644.76642.14971.09956.59135.84855.84852.52402.52401.78381.7838
H134.82983.92872.64324.56902.16431.09835.82015.00494.67773.09292.52741.78381.7861
H144.82983.92872.64324.56902.16431.09835.82014.67775.00492.52743.09291.78381.7861

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 110.675 C1 C2 O4 125.871
C2 C1 H7 109.401 C2 C1 H8 109.646
C2 C1 H9 109.646 C2 O3 C5 114.551
O3 C2 O4 123.455 O3 C5 C6 106.852
O3 C5 H10 108.705 O3 C5 H11 108.705
C5 C6 H12 109.511 C5 C6 H13 110.724
C5 C6 H14 110.724 C6 C5 H10 112.207
C6 C5 H11 112.207 H7 C1 H8 110.209
H7 C1 H9 110.209 H8 C1 H9 107.708
H10 C5 H11 108.063 H12 C6 H13 108.511
H12 C6 H14 108.511 H13 C6 H14 108.800
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability