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

using model chemistry: TPSSh/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at TPSSh/3-21G*
 hartrees
Energy at 0K-306.029413
Energy at 298.15K 
HF Energy-306.029413
Nuclear repulsion energy240.222026
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 TPSSh/3-21G*
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 3067 8.62 70.37 0.66 0.80
2 A' 3127 3020 24.63 71.30 0.72 0.84
3 A' 3074 2968 11.75 85.64 0.11 0.20
4 A' 3069 2964 1.17 118.35 0.01 0.01
5 A' 3059 2954 15.82 98.41 0.03 0.06
6 A' 1740 1681 132.68 1.42 0.50 0.67
7 A' 1576 1522 6.47 3.83 0.73 0.84
8 A' 1563 1509 4.38 27.83 0.75 0.86
9 A' 1531 1479 20.14 19.84 0.74 0.85
10 A' 1461 1411 8.68 6.06 0.64 0.78
11 A' 1437 1387 28.41 6.52 0.66 0.80
12 A' 1400 1352 2.69 4.31 0.75 0.86
13 A' 1225 1183 342.79 0.74 0.30 0.46
14 A' 1140 1101 11.46 6.38 0.17 0.29
15 A' 1041 1006 151.70 2.14 0.54 0.70
16 A' 1011 976 0.90 2.86 0.56 0.72
17 A' 914 883 4.51 1.41 0.61 0.76
18 A' 822 794 8.58 15.85 0.27 0.42
19 A' 614 593 4.95 10.59 0.33 0.50
20 A' 394 381 0.44 0.36 0.54 0.70
21 A' 347 335 12.64 2.91 0.36 0.53
22 A' 180 174 5.00 0.32 0.68 0.81
23 A" 3144 3036 38.80 11.87 0.75 0.86
24 A" 3129 3021 5.00 58.48 0.75 0.86
25 A" 3111 3005 4.89 92.41 0.75 0.86
26 A" 1555 1502 6.77 24.74 0.75 0.86
27 A" 1544 1491 10.28 21.77 0.75 0.86
28 A" 1304 1259 0.09 12.58 0.75 0.86
29 A" 1178 1137 4.39 5.39 0.75 0.86
30 A" 1093 1055 8.55 0.49 0.75 0.86
31 A" 833 804 2.05 0.08 0.75 0.86
32 A" 587 567 3.32 1.45 0.75 0.86
33 A" 253 244 1.77 0.00 0.75 0.86
34 A" 153 148 5.60 0.01 0.75 0.86
35 A" 63 61 1.10 0.13 0.75 0.86
36 A" 30 29 0.30 0.32 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25938.6 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 25048.9 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 TPSSh/3-21G*
ABC
0.26765 0.06879 0.05647

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.331 0.084 0.000
C2 -0.941 -0.520 0.000
O3 0.000 0.502 0.000
O4 -0.628 -1.712 0.000
C5 1.417 0.025 0.000
C6 2.262 1.297 0.000
H7 -3.073 -0.715 0.000
H8 -2.452 0.718 0.885
H9 -2.452 0.718 -0.885
H10 1.582 -0.592 0.888
H11 1.582 -0.592 -0.888
H12 3.328 1.042 0.000
H13 2.036 1.894 -0.890
H14 2.036 1.894 0.890

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.51532.36782.47403.74754.74971.09101.09571.09574.06844.06845.73924.81034.8103
C21.51531.38911.23192.41943.68192.14172.14512.14512.67532.67534.54573.93483.9348
O32.36781.38912.30131.49462.39723.30582.61622.61622.11872.11873.37162.62222.6222
O42.47401.23192.30132.68304.17192.64033.16443.16442.63202.63204.82064.57114.5711
C53.74752.41941.49462.68301.52704.55064.02894.02891.09441.09442.16532.16072.1607
C64.74973.68192.39724.17191.52705.70194.83134.83132.19562.19561.09651.09491.0949
H71.09102.14173.30582.64034.55065.70191.79531.79534.74084.74086.63845.80615.8061
H81.09572.14512.61623.16444.02894.83131.79531.77054.24164.59745.85694.96824.6404
H91.09572.14512.61623.16444.02894.83131.79531.77054.59744.24165.85694.64044.9682
H104.06842.67532.11872.63201.09442.19564.74084.24164.59741.77662.55153.09032.5276
H114.06842.67532.11872.63201.09442.19564.74084.59744.24161.77662.55152.52763.0903
H125.73924.54573.37164.82062.16531.09656.63845.85695.85692.55152.55151.78491.7849
H134.81033.93482.62224.57112.16071.09495.80614.96824.64043.09032.52761.78491.7793
H144.81033.93482.62224.57112.16071.09495.80614.64044.96822.52763.09031.78491.7793

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 109.143 C1 C2 O4 128.163
C2 C1 H7 109.438 C2 C1 H8 109.427
C2 C1 H9 109.427 C2 O3 C5 114.015
O3 C2 O4 122.694 O3 C5 C6 104.994
O3 C5 H10 108.853 O3 C5 H11 108.853
C5 C6 H12 110.168 C5 C6 H13 109.902
C5 C6 H14 109.902 C6 C5 H10 112.728
C6 C5 H11 112.728 H7 C1 H8 110.367
H7 C1 H9 110.367 H8 C1 H9 107.788
H10 C5 H11 108.528 H12 C6 H13 109.074
H12 C6 H14 109.074 H13 C6 H14 108.692
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.663      
2 C 0.626      
3 O -0.500      
4 O -0.487      
5 C -0.188      
6 C -0.617      
7 H 0.237      
8 H 0.244      
9 H 0.244      
10 H 0.229      
11 H 0.229      
12 H 0.206      
13 H 0.221      
14 H 0.221      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.321 1.670 0.000 1.701
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 8.429 0.517 0.000
y 0.517 6.891 0.000
z 0.000 0.000 5.132


<r2> (average value of r2) Å2
<r2> 204.469
(<r2>)1/2 14.299