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: M06-2X/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at M06-2X/6-31G**
 hartrees
Energy at 0K-307.573055
Energy at 298.15K 
HF Energy-307.573055
Nuclear repulsion energy244.277536
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 M06-2X/6-31G**
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' 3221 3061 4.43 64.96 0.69 0.82
2 A' 3174 3017 18.74 73.23 0.72 0.83
3 A' 3101 2948 1.46 105.98 0.00 0.01
4 A' 3093 2940 16.99 59.46 0.15 0.25
5 A' 3090 2937 11.68 146.39 0.01 0.01
6 A' 1895 1801 253.93 3.58 0.42 0.59
7 A' 1537 1461 4.73 1.18 0.73 0.85
8 A' 1515 1440 1.87 23.82 0.75 0.86
9 A' 1487 1413 12.95 15.07 0.74 0.85
10 A' 1452 1380 13.81 4.12 0.75 0.86
11 A' 1420 1350 118.05 3.73 0.75 0.86
12 A' 1396 1327 19.72 2.51 0.61 0.76
13 A' 1321 1255 392.71 0.47 0.54 0.70
14 A' 1160 1102 34.16 6.55 0.15 0.26
15 A' 1121 1066 53.19 3.53 0.67 0.80
16 A' 1022 972 6.16 1.26 0.23 0.37
17 A' 977 929 3.65 2.33 0.24 0.39
18 A' 889 845 7.81 8.50 0.37 0.53
19 A' 652 620 9.18 7.59 0.32 0.49
20 A' 432 411 0.91 0.29 0.72 0.84
21 A' 380 362 10.43 2.47 0.31 0.47
22 A' 201 191 5.06 0.27 0.67 0.81
23 A" 3178 3020 29.73 42.60 0.75 0.86
24 A" 3177 3020 1.08 46.63 0.75 0.86
25 A" 3137 2981 13.04 76.64 0.75 0.86
26 A" 1502 1428 5.64 19.71 0.75 0.86
27 A" 1491 1417 8.33 16.80 0.75 0.86
28 A" 1307 1242 1.08 12.19 0.75 0.86
29 A" 1190 1131 5.08 1.38 0.75 0.86
30 A" 1070 1017 7.56 0.70 0.75 0.86
31 A" 813 773 0.46 0.21 0.75 0.86
32 A" 605 575 6.06 1.40 0.75 0.86
33 A" 266 253 1.08 0.01 0.75 0.86
34 A" 155 147 4.25 0.01 0.75 0.86
35 A" 76 73 0.00 0.31 0.75 0.86
36 A" 62 59 0.93 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26282.3 cm-1
Scaled (by 0.9504) Zero Point Vibrational Energy (zpe) 24978.7 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 M06-2X/6-31G**
ABC
0.28252 0.07032 0.05814

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.308 0.026 0.000
C2 -0.903 -0.516 0.000
O3 0.000 0.482 0.000
O4 -0.599 -1.682 0.000
C5 1.372 0.064 0.000
C6 2.223 1.315 0.000
H7 -3.013 -0.803 0.000
H8 -2.460 0.653 0.881
H9 -2.460 0.653 -0.881
H10 1.553 -0.558 0.882
H11 1.553 -0.558 -0.882
H12 3.282 1.047 0.000
H13 2.017 1.919 -0.886
H14 2.017 1.919 0.886

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50612.35252.41633.68054.71041.08791.09201.09204.00314.00315.68244.80334.8033
C21.50611.34541.20542.34763.62192.12952.13742.13742.60942.60944.46703.90343.9034
O32.35251.34542.24561.43472.37363.27512.61912.61912.06662.06663.33032.63022.6302
O42.41631.20542.24562.63354.11652.56883.11343.11342.58302.58304.74504.53864.5386
C53.68052.34761.43472.63351.51274.46983.97673.97671.09411.09412.14812.15482.1548
C64.71043.62192.37364.11651.51275.64744.81114.81112.17592.17591.09241.09221.0922
H71.08792.12953.27512.56884.46985.64741.78881.78884.65634.65636.56095.78705.7870
H81.09202.13742.61913.11343.97674.81111.78881.76254.19214.54775.82304.97724.6529
H91.09202.13742.61913.11343.97674.81111.78881.76254.54774.19215.82304.65294.9772
H104.00312.60942.06662.58301.09412.17594.65634.19214.54771.76352.51913.07872.5206
H114.00312.60942.06662.58301.09412.17594.65634.54774.19211.76352.51912.52063.0787
H125.68244.46703.33034.74502.14811.09246.56095.82305.82302.51912.51911.77361.7736
H134.80333.90342.63024.53862.15481.09225.78704.97724.65293.07872.52061.77361.7721
H144.80333.90342.63024.53862.15481.09225.78704.65294.97722.52063.07871.77361.7721

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 111.055 C1 C2 O4 125.664
C2 C1 H7 109.292 C2 C1 H8 109.679
C2 C1 H9 109.679 C2 O3 C5 115.189
O3 C2 O4 123.281 O3 C5 C6 107.254
O3 C5 H10 108.877 O3 C5 H11 108.877
C5 C6 H12 110.040 C5 C6 H13 110.591
C5 C6 H14 110.591 C6 C5 H10 112.176
C6 C5 H11 112.176 H7 C1 H8 110.284
H7 C1 H9 110.284 H8 C1 H9 107.604
H10 C5 H11 107.406 H12 C6 H13 108.558
H12 C6 H14 108.558 H13 C6 H14 108.442
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.431      
2 C 0.601      
3 O -0.492      
4 O -0.479      
5 C 0.023      
6 C -0.385      
7 H 0.161      
8 H 0.160      
9 H 0.160      
10 H 0.137      
11 H 0.137      
12 H 0.130      
13 H 0.139      
14 H 0.139      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.211 1.905 0.000 1.917
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.176 -0.970 0.000
y -0.970 -42.158 0.000
z 0.000 0.000 -35.294
Traceless
 xyz
x 8.550 -0.970 0.000
y -0.970 -9.423 0.000
z 0.000 0.000 0.873
Polar
3z2-r21.746
x2-y211.982
xy-0.970
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.392 0.435 0.000
y 0.435 7.357 0.000
z 0.000 0.000 5.741


<r2> (average value of r2) Å2
<r2> 199.739
(<r2>)1/2 14.133