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

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-304.837718
Energy at 298.15K 
HF Energy-304.163233
Nuclear repulsion energy238.488103
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 MP4/3-21G
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' 3154 3059        
2 A' 3115 3021        
3 A' 3057 2965        
4 A' 3052 2959        
5 A' 3044 2952        
6 A' 1675 1624        
7 A' 1591 1543        
8 A' 1578 1530        
9 A' 1547 1500        
10 A' 1476 1431        
11 A' 1450 1406        
12 A' 1419 1376        
13 A' 1224 1187        
14 A' 1146 1111        
15 A' 1050 1018        
16 A' 1007 976        
17 A' 899 872        
18 A' 809 785        
19 A' 610 591        
20 A' 400 388        
21 A' 349 339        
22 A' 182 177        
23 A" 3129 3034        
24 A" 3123 3029        
25 A" 3090 2996        
26 A" 1567 1520        
27 A" 1558 1511        
28 A" 1316 1277        
29 A" 1200 1164        
30 A" 1103 1070        
31 A" 846 821        
32 A" 578 560        
33 A" 261 253        
34 A" 151 146        
35 A" 72 70        
36 A" 28 27        

Unscaled Zero Point Vibrational Energy (zpe) 25925.9 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 25142.9 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 MP4/3-21G
ABC
0.26347 0.06775 0.05560

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.349 0.065 0.000
C2 -0.942 -0.534 0.000
O3 0.000 0.506 0.000
O4 -0.622 -1.736 0.000
C5 1.426 0.041 0.000
C6 2.265 1.329 0.000
H7 -3.083 -0.747 0.000
H8 -2.477 0.695 0.890
H9 -2.477 0.695 -0.890
H10 1.607 -0.576 0.890
H11 1.607 -0.576 -0.890
H12 3.337 1.086 0.000
H13 2.030 1.924 -0.892
H14 2.030 1.924 0.892

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.52872.38952.49473.77444.78361.09471.09771.09774.10514.10515.77614.84004.8400
C21.52871.40311.24382.43663.70902.15112.15802.15802.70062.70064.57503.95873.9587
O32.38951.40312.32651.49982.41003.32752.63842.63842.13242.13243.38672.63222.6322
O42.49471.24382.32652.71134.21082.65173.18443.18442.66592.66594.86144.60714.6071
C53.77442.43661.49982.71131.53774.57684.05584.05581.09821.09822.17792.16952.1695
C64.78363.70902.41004.21081.53775.73664.86594.86592.20372.20371.09911.09721.0972
H71.09472.15113.32752.65174.57685.73661.79961.79964.77664.77666.67585.83715.8371
H81.09772.15802.63843.18444.05584.86591.79961.77944.27734.63285.89414.99974.6716
H91.09772.15802.63843.18444.05584.86591.79961.77944.63284.27735.89414.67164.9997
H104.10512.70062.13242.66591.09822.20374.77664.27734.63281.77992.55843.09932.5359
H114.10512.70062.13242.66591.09822.20374.77664.63284.27731.77992.55842.53593.0993
H125.77614.57503.38674.86142.17791.09916.67585.89415.89412.55842.55841.79011.7901
H134.84003.95872.63224.60712.16951.09725.83714.99974.67163.09932.53591.79011.7835
H144.84003.95872.63224.60712.16951.09725.83714.67164.99972.53593.09931.79011.7835

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 109.108 C1 C2 O4 127.970
C2 C1 H7 109.043 C2 C1 H8 109.408
C2 C1 H9 109.408 C2 O3 C5 114.108
O3 C2 O4 122.922 O3 C5 C6 105.008
O3 C5 H10 109.354 O3 C5 H11 109.354
C5 C6 H12 110.265 C5 C6 H13 109.721
C5 C6 H14 109.721 C6 C5 H10 112.384
C6 C5 H11 112.384 H7 C1 H8 110.334
H7 C1 H9 110.334 H8 C1 H9 108.296
H10 C5 H11 108.274 H12 C6 H13 109.189
H12 C6 H14 109.189 H13 C6 H14 108.728
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability