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

using model chemistry: QCISD/6-311G**

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/6-311G**
 hartrees
Energy at 0K-306.982231
Energy at 298.15K 
HF Energy-305.954158
Nuclear repulsion energy243.675571
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/6-311G**
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' 3189 3043 8.86      
2 A' 3141 2997 27.84      
3 A' 3083 2942 17.42      
4 A' 3078 2937 3.01      
5 A' 3062 2922 17.22      
6 A' 1848 1763 233.44      
7 A' 1549 1478 4.49      
8 A' 1522 1452 2.44      
9 A' 1497 1428 10.98      
10 A' 1465 1398 3.72      
11 A' 1431 1365 68.93      
12 A' 1415 1350 21.04      
13 A' 1306 1246 415.75      
14 A' 1164 1110 17.56      
15 A' 1116 1065 77.37      
16 A' 1031 984 11.25      
17 A' 967 922 5.82      
18 A' 888 847 11.81      
19 A' 650 620 9.30      
20 A' 433 413 0.65      
21 A' 379 361 9.32      
22 A' 200 191 4.38      
23 A" 3151 3007 13.67      
24 A" 3151 3006 38.41      
25 A" 3123 2979 6.09      
26 A" 1507 1438 5.78      
27 A" 1501 1432 7.24      
28 A" 1324 1263 1.71      
29 A" 1208 1152 4.12      
30 A" 1081 1032 4.14      
31 A" 826 788 0.05      
32 A" 607 579 6.68      
33 A" 270 258 1.02      
34 A" 151 144 4.34      
35 A" 79 75 0.10      
36 A" 54 52 0.69      

Unscaled Zero Point Vibrational Energy (zpe) 26222.7 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 25019.1 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/6-311G**
ABC
0.28058 0.07003 0.05787

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.312 0.033 0.000
C2 -0.904 -0.519 0.000
O3 0.000 0.484 0.000
O4 -0.606 -1.687 0.000
C5 1.375 0.060 0.000
C6 2.230 1.315 0.000
H7 -3.025 -0.792 0.000
H8 -2.458 0.661 0.884
H9 -2.458 0.661 -0.884
H10 1.559 -0.559 0.885
H11 1.559 -0.559 -0.885
H12 3.291 1.041 0.000
H13 2.024 1.919 -0.889
H14 2.024 1.919 0.889

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.51202.35512.42253.68674.71871.09081.09451.09454.01484.01485.69244.81074.8107
C21.51201.35041.20532.35163.63122.13802.14252.14252.61812.61814.47583.91283.9128
O32.35511.35042.25391.43882.37963.28282.61842.61842.07392.07393.33772.63572.6357
O42.42251.20532.25392.64144.12962.57893.11873.11872.59742.59744.75704.55124.5512
C53.68672.35161.43882.64141.51834.48153.97953.97951.09511.09512.15252.16082.1608
C64.71873.63122.37964.12961.51835.66124.81524.81522.17752.17751.09581.09481.0948
H71.09082.13803.28282.57894.48155.66121.79311.79314.67474.67476.57625.79915.7991
H81.09452.14252.61843.11873.97954.81521.79311.76874.19874.55625.82904.98154.6551
H91.09452.14252.61843.11873.97954.81521.79311.76874.55624.19875.82904.65514.9815
H104.01482.61812.07392.59741.09512.17754.67474.19874.55621.76952.51773.08262.5211
H114.01482.61812.07392.59741.09512.17754.67474.55624.19871.76952.51772.52113.0826
H125.69244.47583.33774.75702.15251.09586.57625.82905.82902.51772.51771.77981.7798
H134.81073.91282.63574.55122.16081.09485.79914.98154.65513.08262.52111.77981.7781
H144.81073.91282.63574.55122.16081.09485.79914.65514.98152.52113.08261.77981.7781

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 110.601 C1 C2 O4 125.752
C2 C1 H7 109.394 C2 C1 H8 109.529
C2 C1 H9 109.529 C2 O3 C5 114.902
O3 C2 O4 123.647 O3 C5 C6 107.130
O3 C5 H10 109.111 O3 C5 H11 109.111
C5 C6 H12 109.796 C5 C6 H13 110.519
C5 C6 H14 110.519 C6 C5 H10 111.831
C6 C5 H11 111.831 H7 C1 H8 110.278
H7 C1 H9 110.278 H8 C1 H9 107.809
H10 C5 H11 107.779 H12 C6 H13 108.678
H12 C6 H14 108.678 H13 C6 H14 108.600
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability