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: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G4
 hartrees
Energy at 0K-307.528657
Energy at 298.15K-307.520216
HF Energy-307.732573
Nuclear repulsion energy243.434968
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 B3LYP/6-31G(2df,p)
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' 3168 3057 7.40 61.94 0.67 0.81
2 A' 3120 3010 22.44 71.14 0.70 0.82
3 A' 3056 2949 3.62 98.42 0.00 0.01
4 A' 3051 2944 15.95 89.84 0.08 0.15
5 A' 3045 2939 15.48 114.37 0.01 0.01
6 A' 1824 1760 222.76 3.40 0.30 0.46
7 A' 1521 1467 5.29 1.00 0.73 0.84
8 A' 1496 1444 1.86 19.30 0.75 0.86
9 A' 1470 1418 11.67 13.33 0.71 0.83
10 A' 1423 1374 4.87 4.18 0.71 0.83
11 A' 1402 1353 27.16 1.20 0.75 0.86
12 A' 1387 1338 23.11 3.49 0.60 0.75
13 A' 1271 1226 401.62 0.38 0.22 0.36
14 A' 1136 1097 15.25 6.28 0.12 0.22
15 A' 1076 1038 103.63 2.42 0.75 0.85
16 A' 1010 975 7.07 1.35 0.18 0.31
17 A' 948 915 4.43 1.72 0.18 0.31
18 A' 861 831 7.39 8.83 0.31 0.47
19 A' 638 616 5.85 7.57 0.29 0.46
20 A' 424 409 0.78 0.35 0.68 0.81
21 A' 367 354 9.26 2.65 0.28 0.44
22 A' 191 185 4.74 0.29 0.62 0.77
23 A" 3125 3016 34.41 23.23 0.75 0.86
24 A" 3121 3012 4.99 54.14 0.75 0.86
25 A" 3088 2980 8.45 77.79 0.75 0.86
26 A" 1486 1434 4.49 15.91 0.75 0.86
27 A" 1476 1425 6.30 13.46 0.75 0.86
28 A" 1291 1246 0.94 8.76 0.75 0.86
29 A" 1183 1142 4.11 1.18 0.75 0.86
30 A" 1065 1027 6.35 0.26 0.75 0.86
31 A" 807 779 0.61 0.21 0.75 0.86
32 A" 608 587 4.81 0.96 0.75 0.86
33 A" 261 252 0.95 0.00 0.75 0.86
34 A" 153 147 3.62 0.02 0.75 0.86
35 A" 60 58 0.02 0.25 0.75 0.86
36 A" 49 47 0.75 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25828.5 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 24924.5 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 B3LYP/6-31G(2df,p)
ABC
0.28075 0.06963 0.05759

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.312 0.032 0.000
C2 -0.907 -0.523 0.000
O3 0.000 0.476 0.000
O4 -0.614 -1.692 0.000
C5 1.383 0.067 0.000
C6 2.232 1.323 0.000
H7 -3.026 -0.790 0.000
H8 -2.467 0.662 0.881
H9 -2.467 0.662 -0.881
H10 1.569 -0.555 0.882
H11 1.569 -0.555 -0.882
H12 3.293 1.054 0.000
H13 2.031 1.931 -0.887
H14 2.031 1.931 0.887

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.51042.35412.41983.69454.72421.08921.09371.09374.02214.02215.69734.82244.8224
C21.51041.34941.20522.36443.64212.13622.14762.14762.62802.62804.48643.92973.9297
O32.35411.34942.25321.44172.38783.28072.62592.62592.07342.07343.34342.65132.6513
O42.41981.20522.25322.66074.14632.57583.12253.12252.61392.61394.77534.57264.5726
C53.69452.36441.44172.66071.51654.49153.99333.99331.09461.09462.15042.16362.1636
C64.72423.64212.38784.14631.51655.66774.82664.82662.17792.17791.09411.09371.0937
H71.08922.13623.28072.57584.49155.66771.78801.78804.68474.68476.58315.81145.8114
H81.09372.14762.62593.12253.99334.82661.78801.76104.21474.56825.84004.99664.6738
H91.09372.14762.62593.12253.99334.82661.78801.76104.56824.21475.84004.67384.9966
H104.02212.62802.07342.61391.09462.17794.68474.21474.56821.76302.51773.08522.5284
H114.02212.62802.07342.61391.09462.17794.68474.56824.21471.76302.51772.52843.0852
H125.69734.48643.34344.77532.15041.09416.58315.84005.84002.51772.51771.77401.7740
H134.82243.92972.65134.57262.16361.09375.81144.99664.67383.08522.52841.77401.7730
H144.82243.92972.65134.57262.16361.09375.81144.67384.99662.52843.08521.77401.7730

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 110.679 C1 C2 O4 125.648
C2 C1 H7 109.449 C2 C1 H8 110.093
C2 C1 H9 110.093 C2 O3 C5 115.806
O3 C2 O4 123.673 O3 C5 C6 107.612
O3 C5 H10 108.937 O3 C5 H11 108.937
C5 C6 H12 109.833 C5 C6 H13 110.923
C5 C6 H14 110.923 C6 C5 H10 112.013
C6 C5 H11 112.013 H7 C1 H8 109.982
H7 C1 H9 109.982 H8 C1 H9 107.218
H10 C5 H11 107.265 H12 C6 H13 108.385
H12 C6 H14 108.385 H13 C6 H14 108.312
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.477      
2 C 0.429      
3 O -0.239      
4 O -0.351      
5 C -0.038      
6 C -0.391      
7 H 0.147      
8 H 0.148      
9 H 0.148      
10 H 0.121      
11 H 0.121      
12 H 0.123      
13 H 0.129      
14 H 0.129      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.282 1.916 0.000 1.937
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 201.339
(<r2>)1/2 14.189