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: B3PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-311G**
 hartrees
Energy at 0K-307.674698
Energy at 298.15K 
HF Energy-307.674698
Nuclear repulsion energy243.956002
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 B3PW91/6-311G**
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' 3176 3059 6.84 65.03 0.69 0.81
2 A' 3125 3010 23.88 77.08 0.70 0.83
3 A' 3061 2948 4.92 92.26 0.00 0.00
4 A' 3058 2945 14.30 138.22 0.06 0.11
5 A' 3047 2935 16.72 135.29 0.01 0.01
6 A' 1830 1763 258.81 3.22 0.37 0.54
7 A' 1517 1461 6.69 1.79 0.75 0.86
8 A' 1494 1439 3.15 15.35 0.75 0.86
9 A' 1465 1411 14.59 9.99 0.69 0.81
10 A' 1426 1373 6.91 2.99 0.72 0.84
11 A' 1397 1345 66.31 1.21 0.75 0.86
12 A' 1380 1329 27.03 2.27 0.74 0.85
13 A' 1274 1227 408.42 0.43 0.30 0.46
14 A' 1140 1098 14.44 6.23 0.15 0.26
15 A' 1082 1042 105.36 2.52 0.75 0.86
16 A' 1009 972 8.36 1.35 0.22 0.36
17 A' 959 923 5.98 1.98 0.15 0.26
18 A' 868 836 8.31 7.03 0.33 0.49
19 A' 645 621 6.26 7.70 0.33 0.50
20 A' 429 413 0.81 0.31 0.63 0.77
21 A' 370 356 9.80 2.93 0.32 0.48
22 A' 193 186 5.05 0.37 0.66 0.80
23 A" 3132 3016 38.66 24.83 0.75 0.86
24 A" 3130 3015 3.73 54.56 0.75 0.86
25 A" 3097 2983 7.18 90.67 0.75 0.86
26 A" 1480 1425 8.03 11.17 0.75 0.86
27 A" 1470 1415 10.28 9.92 0.75 0.86
28 A" 1295 1247 1.12 7.87 0.75 0.86
29 A" 1176 1133 4.42 0.65 0.75 0.86
30 A" 1060 1021 7.07 0.13 0.75 0.86
31 A" 809 779 1.07 0.16 0.75 0.86
32 A" 607 585 4.55 1.00 0.75 0.86
33 A" 266 256 1.07 0.03 0.75 0.86
34 A" 155 149 4.56 0.03 0.75 0.86
35 A" 59 57 0.21 0.24 0.75 0.86
36 A" 43 42 0.83 0.02 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25861.3 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 24907.0 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 B3PW91/6-311G**
ABC
0.28225 0.06997 0.05788

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.306 0.031 0.000
C2 -0.907 -0.520 0.000
O3 0.000 0.476 0.000
O4 -0.612 -1.687 0.000
C5 1.381 0.066 0.000
C6 2.226 1.318 0.000
H7 -3.019 -0.791 0.000
H8 -2.458 0.660 0.880
H9 -2.458 0.660 -0.880
H10 1.564 -0.554 0.882
H11 1.564 -0.554 -0.882
H12 3.287 1.051 0.000
H13 2.025 1.925 -0.886
H14 2.025 1.925 0.886

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50332.34832.41223.68704.71131.08821.09261.09264.01204.01205.68454.80884.8088
C21.50331.34721.20382.36213.63272.12902.13842.13842.62412.62414.47823.91893.9189
O32.34831.34722.24851.44072.38033.27392.61742.61742.07022.07023.33652.64262.6426
O42.41221.20382.24852.65514.13422.56763.11283.11282.60782.60784.76454.55934.5593
C53.68702.36211.44072.65511.51044.48263.98333.98331.09351.09352.14482.15712.1571
C64.71133.63272.38034.13421.51045.65334.81174.81172.17262.17261.09341.09261.0926
H71.08822.12903.27392.56764.48265.65331.78731.78734.67314.67316.56885.79645.7964
H81.09262.13842.61743.11283.98334.81171.78731.76084.20154.55615.82494.98164.6579
H91.09262.13842.61743.11283.98334.81171.78731.76084.55614.20155.82494.65794.9816
H104.01202.62412.07022.60781.09352.17264.67314.20154.55611.76352.51383.07922.5212
H114.01202.62412.07022.60781.09352.17264.67314.55614.20151.76352.51382.52123.0792
H125.68454.47823.33654.76452.14481.09346.56885.82495.82492.51382.51381.77231.7723
H134.80883.91892.64264.55932.15711.09265.79644.98164.65793.07922.52121.77231.7720
H144.80883.91892.64264.55932.15711.09265.79644.65794.98162.52123.07921.77231.7720

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 110.817 C1 C2 O4 125.659
C2 C1 H7 109.439 C2 C1 H8 109.919
C2 C1 H9 109.919 C2 O3 C5 115.788
O3 C2 O4 123.524 O3 C5 C6 107.501
O3 C5 H10 108.780 O3 C5 H11 108.780
C5 C6 H12 109.885 C5 C6 H13 110.914
C5 C6 H14 110.914 C6 C5 H10 112.109
C6 C5 H11 112.109 H7 C1 H8 110.085
H7 C1 H9 110.085 H8 C1 H9 107.370
H10 C5 H11 107.482 H12 C6 H13 108.337
H12 C6 H14 108.337 H13 C6 H14 108.373
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.332      
2 C 0.322      
3 O -0.330      
4 O -0.357      
5 C -0.060      
6 C -0.347      
7 H 0.150      
8 H 0.147      
9 H 0.147      
10 H 0.137      
11 H 0.137      
12 H 0.124      
13 H 0.130      
14 H 0.130      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.292 1.918 0.000 1.941
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.427 -1.056 0.000
y -1.056 -42.498 0.000
z 0.000 0.000 -35.357
Traceless
 xyz
x 8.501 -1.056 0.000
y -1.056 -9.606 0.000
z 0.000 0.000 1.106
Polar
3z2-r22.211
x2-y212.071
xy-1.056
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.099 0.501 0.000
y 0.501 7.778 0.000
z 0.000 0.000 6.025


<r2> (average value of r2) Å2
<r2> 200.623
(<r2>)1/2 14.164