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

using model chemistry: QCISD/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 QCISD/6-31+G**
 hartrees
Energy at 0K-306.875411
Energy at 298.15K 
HF Energy-305.893361
Nuclear repulsion energy242.987472
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 QCISD/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' 3239 3062 7.48      
2 A' 3188 3014 26.64      
3 A' 3130 2959 16.82      
4 A' 3121 2951 3.92      
5 A' 3105 2936 18.92      
6 A' 1817 1718 268.86      
7 A' 1566 1481 3.29      
8 A' 1545 1460 3.51      
9 A' 1523 1440 12.49      
10 A' 1479 1398 3.51      
11 A' 1455 1375 58.22      
12 A' 1430 1352 6.15      
13 A' 1315 1244 421.77      
14 A' 1168 1104 8.94      
15 A' 1112 1051 95.18      
16 A' 1043 986 8.48      
17 A' 968 915 9.08      
18 A' 880 832 13.75      
19 A' 644 609 8.23      
20 A' 435 411 0.83      
21 A' 374 353 8.73      
22 A' 197 187 5.77      
23 A" 3203 3028 42.29      
24 A" 3202 3027 5.19      
25 A" 3177 3004 3.53      
26 A" 1531 1447 6.01      
27 A" 1521 1438 7.75      
28 A" 1318 1246 1.02      
29 A" 1210 1144 3.95      
30 A" 1089 1030 3.48      
31 A" 830 784 0.03      
32 A" 607 573 7.50      
33 A" 268 253 1.10      
34 A" 150 142 5.69      
35 A" 67 63 0.21      
36 A" 40 38 0.43      

Unscaled Zero Point Vibrational Energy (zpe) 26472.3 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 25026.9 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 QCISD/6-31+G**
ABC
0.27899 0.06956 0.05747

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.315 0.025 0.000
C2 -0.910 -0.521 0.000
O3 0.000 0.484 0.000
O4 -0.607 -1.701 0.000
C5 1.388 0.069 0.000
C6 2.228 1.329 0.000
H7 -3.020 -0.802 0.000
H8 -2.466 0.648 0.881
H9 -2.466 0.648 -0.881
H10 1.568 -0.545 0.883
H11 1.568 -0.545 -0.883
H12 3.286 1.064 0.000
H13 2.020 1.930 -0.886
H14 2.020 1.930 0.886

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50742.36032.42813.70374.72621.08641.09011.09014.02344.02345.69724.81764.8176
C21.50741.35571.21832.37263.64222.12912.13682.13682.63122.63124.48563.92123.9212
O32.36031.35572.26771.44922.38243.28272.62422.62422.07362.07363.33722.63742.6374
O42.42811.21832.26772.66684.14902.57553.12283.12282.61682.61684.77514.56814.5681
C53.70372.37261.44922.66681.51434.49383.99643.99641.09051.09052.14322.15592.1559
C64.72623.64222.38244.14901.51435.66404.82424.82422.17432.17431.09161.09021.0902
H71.08642.12913.28272.57554.49385.66401.78491.78494.68014.68016.57695.80115.8011
H81.09012.13682.62423.12283.99644.82421.78491.76294.20774.56275.83484.98954.6660
H91.09012.13682.62423.12283.99644.82421.78491.76294.56274.20775.83484.66604.9895
H104.02342.63122.07362.61681.09052.17434.68014.20774.56271.76622.51413.07562.5160
H114.02342.63122.07362.61681.09052.17434.68014.56274.20771.76622.51412.51603.0756
H125.69724.48563.33724.77512.14321.09166.57695.83485.83482.51412.51411.77141.7714
H134.81763.92122.63744.56812.15591.09025.80114.98954.66603.07562.51601.77141.7718
H144.81763.92122.63744.56812.15591.09025.80114.66604.98952.51603.07561.77141.7718

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 110.939 C1 C2 O4 125.620
C2 C1 H7 109.256 C2 C1 H8 109.647
C2 C1 H9 109.647 C2 O3 C5 115.494
O3 C2 O4 123.441 O3 C5 C6 106.993
O3 C5 H10 108.646 O3 C5 H11 108.646
C5 C6 H12 109.594 C5 C6 H13 110.685
C5 C6 H14 110.685 C6 C5 H10 112.152
C6 C5 H11 112.152 H7 C1 H8 110.177
H7 C1 H9 110.177 H8 C1 H9 107.918
H10 C5 H11 108.147 H12 C6 H13 108.563
H12 C6 H14 108.563 H13 C6 H14 108.694
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability