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

using model chemistry: QCISD(T)/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 QCISD(T)/cc-pVDZ
 hartrees
Energy at 0K-306.904579
Energy at 298.15K 
HF Energy-305.895256
Nuclear repulsion energy242.283431
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(T)/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' 3191 3041        
2 A' 3143 2995        
3 A' 3069 2925        
4 A' 3064 2921        
5 A' 3053 2910        
6 A' 1826 1740        
7 A' 1513 1442        
8 A' 1490 1420        
9 A' 1462 1394        
10 A' 1432 1365        
11 A' 1399 1333        
12 A' 1377 1313        
13 A' 1280 1220        
14 A' 1140 1087        
15 A' 1094 1042        
16 A' 1010 962        
17 A' 954 909        
18 A' 866 826        
19 A' 640 610        
20 A' 422 402        
21 A' 372 354        
22 A' 197 187        
23 A" 3153 3005        
24 A" 3150 3002        
25 A" 3112 2966        
26 A" 1475 1406        
27 A" 1470 1401        
28 A" 1289 1228        
29 A" 1180 1124        
30 A" 1058 1008        
31 A" 806 769        
32 A" 598 570        
33 A" 275 262        
34 A" 154 146        
35 A" 82 78        
36 A" 59 56        

Unscaled Zero Point Vibrational Energy (zpe) 25925.7 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 24709.8 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(T)/cc-pVDZ
ABC
0.27672 0.06950 0.05738

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.321 0.046 0.000
C2 -0.912 -0.515 0.000
O3 0.000 0.496 0.000
O4 -0.613 -1.693 0.000
C5 1.379 0.052 0.000
C6 2.248 1.301 0.000
H7 -3.047 -0.782 0.000
H8 -2.467 0.681 0.891
H9 -2.467 0.681 -0.891
H10 1.558 -0.577 0.892
H11 1.558 -0.577 -0.892
H12 3.316 1.016 0.000
H13 2.047 1.915 -0.897
H14 2.047 1.915 0.897

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.51672.36412.43703.69944.73781.10081.10471.10474.02814.02815.71994.83484.8348
C21.51671.36141.21512.35943.64422.15172.15542.15542.62622.62624.49663.93233.9323
O32.36411.36142.27321.44832.38753.30382.62972.62972.09122.09123.35672.64732.6473
O42.43701.21512.27322.64814.14132.59853.14163.14162.59882.59884.77294.57164.5716
C53.69942.35941.44832.64811.52184.50323.99743.99741.10621.10622.16432.17312.1731
C64.73783.64422.38754.14131.52185.68944.83804.83802.19102.19101.10591.10521.1052
H71.10082.15173.30382.59854.50325.68941.80901.80904.69444.69446.61215.83295.8329
H81.10472.15542.62973.14163.99744.83801.80901.78304.21684.57855.86105.00944.6793
H91.10472.15542.62973.14163.99744.83801.80901.78304.57854.21685.86104.67935.0094
H104.02812.62622.09122.59881.10622.19104.69444.21684.57851.78432.53533.10672.5400
H114.02812.62622.09122.59881.10622.19104.69444.57854.21681.78432.53532.54003.1067
H125.71994.49663.35674.77292.16431.10596.61215.86105.86102.53532.53531.79551.7955
H134.83483.93232.64734.57162.17311.10525.83295.00944.67933.10672.54001.79551.7937
H144.83483.93232.64734.57162.17311.10525.83294.67935.00942.54003.10671.79551.7937

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 110.340 C1 C2 O4 125.919
C2 C1 H7 109.551 C2 C1 H8 109.617
C2 C1 H9 109.617 C2 O3 C5 114.195
O3 C2 O4 123.741 O3 C5 C6 106.973
O3 C5 H10 109.166 O3 C5 H11 109.166
C5 C6 H12 109.888 C5 C6 H13 110.626
C5 C6 H14 110.626 C6 C5 H10 111.994
C6 C5 H11 111.994 H7 C1 H8 110.208
H7 C1 H9 110.208 H8 C1 H9 107.613
H10 C5 H11 107.503 H12 C6 H13 108.584
H12 C6 H14 108.584 H13 C6 H14 108.473
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability