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: B2PLYP=FULL/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-307.480353
Energy at 298.15K 
HF Energy-307.114953
Nuclear repulsion energy244.064765
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 B2PLYP=FULL/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' 3208 3208 5.83 58.62 0.69 0.82
2 A' 3163 3163 18.74 66.47 0.72 0.83
3 A' 3093 3093 3.98 79.81 0.00 0.00
4 A' 3091 3091 13.14 105.46 0.06 0.12
5 A' 3082 3082 13.57 103.89 0.01 0.02
6 A' 1820 1820 206.98 3.70 0.31 0.48
7 A' 1540 1540 5.36 0.76 0.74 0.85
8 A' 1519 1519 1.99 18.58 0.75 0.86
9 A' 1491 1491 12.34 12.88 0.72 0.84
10 A' 1442 1442 4.83 3.61 0.74 0.85
11 A' 1418 1418 39.87 1.25 0.75 0.85
12 A' 1402 1402 18.45 2.48 0.60 0.75
13 A' 1287 1287 392.70 0.39 0.31 0.48
14 A' 1150 1150 13.81 6.83 0.12 0.21
15 A' 1094 1094 97.61 2.57 0.74 0.85
16 A' 1023 1023 7.85 1.38 0.18 0.31
17 A' 959 959 4.88 1.85 0.19 0.31
18 A' 870 870 8.03 9.56 0.28 0.44
19 A' 644 644 6.58 7.47 0.29 0.45
20 A' 427 427 0.70 0.31 0.70 0.83
21 A' 371 371 9.53 2.54 0.28 0.44
22 A' 195 195 4.70 0.28 0.61 0.76
23 A" 3171 3171 28.45 22.77 0.75 0.86
24 A" 3167 3167 3.84 51.75 0.75 0.86
25 A" 3135 3135 8.17 71.88 0.75 0.86
26 A" 1509 1509 4.79 15.39 0.75 0.86
27 A" 1499 1499 6.57 12.90 0.75 0.86
28 A" 1308 1308 0.91 8.29 0.75 0.86
29 A" 1198 1198 4.14 1.20 0.75 0.86
30 A" 1078 1078 6.12 0.25 0.75 0.86
31 A" 817 817 0.61 0.21 0.75 0.86
32 A" 615 615 4.82 0.97 0.75 0.86
33 A" 269 269 0.94 0.00 0.75 0.86
34 A" 156 156 3.78 0.02 0.75 0.86
35 A" 69 69 0.00 0.23 0.75 0.86
36 A" 59 59 0.72 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26167.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 26167.2 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 B2PLYP=FULL/6-31G(2df,p)
ABC
0.28122 0.07025 0.05803

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.304 0.039 0.000
C2 -0.905 -0.516 0.000
O3 0.000 0.483 0.000
O4 -0.611 -1.686 0.000
C5 1.375 0.059 0.000
C6 2.228 1.308 0.000
H7 -3.019 -0.779 0.000
H8 -2.455 0.667 0.879
H9 -2.455 0.667 -0.879
H10 1.555 -0.562 0.880
H11 1.555 -0.562 -0.880
H12 3.285 1.036 0.000
H13 2.028 1.913 -0.885
H14 2.028 1.913 0.885

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50572.34662.41773.67994.70691.08671.09071.09074.00384.00385.67784.80224.8022
C21.50571.34781.20642.35183.62572.13022.13912.13912.61312.61314.46853.90973.9097
O32.34661.34782.25341.43942.37633.27192.61422.61422.06962.06963.33162.63462.6346
O42.41771.20642.25342.64424.12662.57283.11643.11642.59452.59454.75324.55024.5502
C53.67992.35181.43942.64421.51274.47353.97693.97691.09161.09162.14532.15592.1559
C64.70693.62572.37634.12661.51275.64714.80814.80812.17342.17341.09131.09061.0906
H71.08672.13023.27192.57284.47355.64711.78421.78424.66284.66286.56025.78805.7880
H81.09072.13912.61423.11643.97694.80811.78421.75814.19424.54815.81894.97574.6527
H91.09072.13912.61423.11643.97694.80811.78421.75814.54814.19425.81894.65274.9757
H104.00382.61312.06962.59451.09162.17344.66284.19424.54811.76002.51413.07632.5199
H114.00382.61312.06962.59451.09162.17344.66284.54814.19421.76002.51412.51993.0763
H125.67784.46853.33164.75322.14531.09136.56025.81895.81892.51412.51411.77031.7703
H134.80223.90972.63464.55022.15591.09065.78804.97574.65273.07632.51991.77031.7692
H144.80223.90972.63464.55022.15591.09065.78804.65274.97572.51993.07631.77031.7692

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 110.522 C1 C2 O4 125.752
C2 C1 H7 109.451 C2 C1 H8 109.926
C2 C1 H9 109.926 C2 O3 C5 115.049
O3 C2 O4 123.726 O3 C5 C6 107.193
O3 C5 H10 108.941 O3 C5 H11 108.941
C5 C6 H12 109.892 C5 C6 H13 110.778
C5 C6 H14 110.778 C6 C5 H10 112.127
C6 C5 H11 112.127 H7 C1 H8 110.054
H7 C1 H9 110.054 H8 C1 H9 107.407
H10 C5 H11 107.445 H12 C6 H13 108.456
H12 C6 H14 108.456 H13 C6 H14 108.410
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability