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: MP3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31+G**
 hartrees
Energy at 0K-306.856538
Energy at 298.15K 
HF Energy-305.894664
Nuclear repulsion energy243.755585
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 MP3/6-31+G**
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' 3271 3043 6.47      
2 A' 3221 2998 24.21      
3 A' 3157 2937 16.76      
4 A' 3150 2931 2.46      
5 A' 3136 2918 17.19      
6 A' 1876 1746 292.19      
7 A' 1576 1466 3.50      
8 A' 1551 1443 3.66      
9 A' 1529 1423 12.07      
10 A' 1489 1385 3.59      
11 A' 1463 1361 81.17      
12 A' 1439 1339 7.12      
13 A' 1339 1246 442.88      
14 A' 1178 1096 14.96      
15 A' 1131 1053 79.02      
16 A' 1051 978 7.83      
17 A' 984 915 7.18      
18 A' 897 834 12.57      
19 A' 656 610 9.60      
20 A' 440 409 0.94      
21 A' 380 353 9.19      
22 A' 200 186 5.93      
23 A" 3234 3009 36.98      
24 A" 3231 3007 4.77      
25 A" 3205 2982 5.83      
26 A" 1537 1430 6.40      
27 A" 1527 1420 8.20      
28 A" 1328 1236 1.24      
29 A" 1219 1134 4.15      
30 A" 1097 1021 4.02      
31 A" 833 775 0.04      
32 A" 615 573 7.51      
33 A" 269 250 1.10      
34 A" 151 140 5.66      
35 A" 69 65 0.09      
36 A" 54 51 0.59      

Unscaled Zero Point Vibrational Energy (zpe) 26739.0 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 24880.6 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 MP3/6-31+G**
ABC
0.28162 0.06987 0.05779

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.311 0.022 0.000
C2 -0.906 -0.519 0.000
O3 0.000 0.480 0.000
O4 -0.605 -1.692 0.000
C5 1.383 0.068 0.000
C6 2.223 1.327 0.000
H7 -3.012 -0.806 0.000
H8 -2.463 0.644 0.880
H9 -2.463 0.644 -0.880
H10 1.566 -0.545 0.881
H11 1.566 -0.545 -0.881
H12 3.280 1.061 0.000
H13 2.017 1.927 -0.884
H14 2.017 1.927 0.884

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50512.35612.41793.69404.71841.08451.08831.08834.01574.01575.68634.81044.8104
C21.50511.34891.21102.36313.63322.12512.13302.13302.62442.62444.47393.91223.9122
O32.35611.34892.25471.44282.37893.27512.62062.62062.06852.06853.33052.63452.6345
O42.41791.21102.25472.65474.13642.56493.11163.11162.60822.60824.76074.55484.5548
C53.69402.36311.44282.65471.51354.48073.98693.98691.08891.08892.14082.15352.1535
C64.71843.63322.37894.13641.51355.65294.81684.81682.17072.17071.08941.08831.0883
H71.08452.12513.27512.56494.48075.65291.78251.78254.66894.66896.56265.79105.7910
H81.08832.13302.62063.11163.98694.81681.78251.75944.20054.55465.82464.98254.6598
H91.08832.13302.62063.11163.98694.81681.78251.75944.55464.20055.82464.65984.9825
H104.01572.62442.06852.60821.08892.17074.66894.20054.55461.76242.50833.07062.5122
H114.01572.62442.06852.60821.08892.17074.66894.55464.20051.76242.50832.51223.0706
H125.68634.47393.33054.76072.14081.08946.56265.82465.82462.50832.50831.76831.7683
H134.81043.91222.63454.55482.15351.08835.79104.98254.65983.07062.51221.76831.7686
H144.81043.91222.63454.55482.15351.08835.79104.65984.98252.51223.07061.76831.7686

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 111.168 C1 C2 O4 125.453
C2 C1 H7 109.225 C2 C1 H8 109.619
C2 C1 H9 109.619 C2 O3 C5 115.612
O3 C2 O4 123.379 O3 C5 C6 107.136
O3 C5 H10 108.772 O3 C5 H11 108.772
C5 C6 H12 109.587 C5 C6 H13 110.665
C5 C6 H14 110.665 C6 C5 H10 112.016
C6 C5 H11 112.016 H7 C1 H8 110.246
H7 C1 H9 110.246 H8 C1 H9 107.869
H10 C5 H11 108.043 H12 C6 H13 108.586
H12 C6 H14 108.586 H13 C6 H14 108.696
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability