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: B3LYP/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 B3LYP/6-31G**
 hartrees
Energy at 0K-307.718557
Energy at 298.15K 
HF Energy-307.718557
Nuclear repulsion energy242.937034
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**
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' 3181 3056 7.50 65.67 0.67 0.80
2 A' 3130 3007 24.51 73.79 0.71 0.83
3 A' 3066 2946 4.80 87.51 0.00 0.01
4 A' 3063 2943 15.31 110.46 0.08 0.14
5 A' 3055 2935 16.09 114.99 0.01 0.01
6 A' 1830 1758 227.99 3.22 0.36 0.53
7 A' 1533 1473 4.70 1.10 0.71 0.83
8 A' 1512 1453 2.06 23.28 0.75 0.86
9 A' 1484 1426 11.79 14.95 0.73 0.84
10 A' 1440 1383 4.75 5.95 0.72 0.84
11 A' 1414 1358 46.56 2.48 0.74 0.85
12 A' 1396 1341 15.13 3.91 0.62 0.77
13 A' 1282 1231 416.25 0.36 0.17 0.29
14 A' 1142 1098 17.57 6.21 0.16 0.28
15 A' 1079 1037 101.15 2.73 0.74 0.85
16 A' 1015 975 5.07 1.41 0.24 0.39
17 A' 951 914 4.96 1.81 0.21 0.35
18 A' 864 831 8.43 9.37 0.34 0.50
19 A' 638 613 6.21 8.00 0.32 0.49
20 A' 428 411 0.85 0.41 0.67 0.80
21 A' 368 354 9.59 2.81 0.32 0.48
22 A' 193 185 5.10 0.29 0.65 0.79
23 A" 3137 3014 37.81 23.90 0.75 0.86
24 A" 3132 3009 5.91 57.57 0.75 0.86
25 A" 3103 2981 9.34 82.98 0.75 0.86
26 A" 1501 1442 4.95 19.23 0.75 0.86
27 A" 1490 1432 7.54 16.38 0.75 0.86
28 A" 1297 1246 0.60 11.36 0.75 0.86
29 A" 1186 1139 4.43 1.62 0.75 0.86
30 A" 1066 1025 7.24 0.64 0.75 0.86
31 A" 813 781 0.68 0.19 0.75 0.86
32 A" 602 578 5.39 1.34 0.75 0.86
33 A" 267 256 1.00 0.01 0.75 0.86
34 A" 154 148 4.13 0.01 0.75 0.86
35 A" 62 60 0.00 0.32 0.75 0.86
36 A" 52 50 0.96 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25962.4 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 24944.7 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 B3LYP/6-31G**
ABC
0.27951 0.06939 0.05738

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.316 0.028 0.000
C2 -0.910 -0.523 0.000
O3 0.000 0.479 0.000
O4 -0.613 -1.698 0.000
C5 1.387 0.069 0.000
C6 2.234 1.327 0.000
H7 -3.028 -0.796 0.000
H8 -2.472 0.658 0.881
H9 -2.472 0.658 -0.881
H10 1.572 -0.552 0.882
H11 1.572 -0.552 -0.882
H12 3.295 1.060 0.000
H13 2.032 1.935 -0.887
H14 2.032 1.935 0.887

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.51042.35902.42503.70264.73091.08931.09401.09404.02864.02865.70464.82904.8290
C21.51041.35341.21172.37133.64722.13592.14772.14772.63392.63394.49273.93433.9343
O32.35901.35342.26151.44612.38913.28532.63062.63062.07682.07683.34582.65202.6520
O42.42501.21172.26152.66824.15352.57843.12783.12782.61982.61984.78294.57994.5799
C53.70262.37131.44612.66821.51664.49864.00184.00181.09461.09462.15032.16432.1643
C64.73093.64722.38914.15351.51665.67364.83414.83412.17892.17891.09441.09381.0938
H71.08932.13593.28532.57844.49865.67361.78811.78814.69024.69026.58965.81745.8174
H81.09402.14772.63063.12784.00184.83411.78811.76224.22144.57485.84795.00414.6814
H91.09402.14772.63063.12784.00184.83411.78811.76224.57484.22145.84794.68145.0041
H104.02862.63392.07682.61981.09462.17894.69024.22144.57481.76412.51923.08642.5293
H114.02862.63392.07682.61981.09462.17894.69024.57484.22141.76412.51922.52933.0864
H125.70464.49273.34584.78292.15031.09446.58965.84795.84792.51922.51921.77401.7740
H134.82903.93432.65204.57992.16431.09385.81745.00414.68143.08642.52931.77401.7733
H144.82903.93432.65204.57992.16431.09385.81744.68145.00412.52933.08641.77401.7733

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 110.804 C1 C2 O4 125.603
C2 C1 H7 109.418 C2 C1 H8 110.078
C2 C1 H9 110.078 C2 O3 C5 115.748
O3 C2 O4 123.593 O3 C5 C6 107.466
O3 C5 H10 108.864 O3 C5 H11 108.864
C5 C6 H12 109.829 C5 C6 H13 110.973
C5 C6 H14 110.973 C6 C5 H10 112.100
C6 C5 H11 112.100 H7 C1 H8 109.971
H7 C1 H9 109.971 H8 C1 H9 107.302
H10 C5 H11 107.374 H12 C6 H13 108.332
H12 C6 H14 108.332 H13 C6 H14 108.317
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.384      
2 C 0.587      
3 O -0.462      
4 O -0.470      
5 C 0.056      
6 C -0.339      
7 H 0.140      
8 H 0.140      
9 H 0.140      
10 H 0.119      
11 H 0.119      
12 H 0.111      
13 H 0.121      
14 H 0.121      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.295 1.940 0.000 1.962
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.230 -0.984 0.000
y -0.984 -42.053 0.000
z 0.000 0.000 -35.182
Traceless
 xyz
x 8.387 -0.984 0.000
y -0.984 -9.346 0.000
z 0.000 0.000 0.959
Polar
3z2-r21.918
x2-y211.822
xy-0.984
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.646 0.497 0.000
y 0.497 7.381 0.000
z 0.000 0.000 5.678


<r2> (average value of r2) Å2
<r2> 201.972
(<r2>)1/2 14.212