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/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-307.453442
Energy at 298.15K 
HF Energy-307.126469
Nuclear repulsion energy242.633297
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/aug-cc-pVDZ
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' 3195 3073 6.30 55.92 0.68 0.81
2 A' 3145 3025 22.47 66.15 0.70 0.83
3 A' 3086 2968 16.69 103.11 0.05 0.09
4 A' 3076 2959 2.50 184.39 0.00 0.01
5 A' 3064 2947 16.98 169.81 0.01 0.01
6 A' 1768 1700 251.05 9.03 0.27 0.43
7 A' 1508 1451 5.47 1.28 0.72 0.84
8 A' 1486 1429 2.91 6.66 0.75 0.86
9 A' 1458 1403 14.36 5.91 0.61 0.76
10 A' 1422 1367 3.87 1.38 0.73 0.84
11 A' 1394 1341 56.48 0.13 0.71 0.83
12 A' 1377 1324 12.79 0.78 0.43 0.60
13 A' 1265 1216 385.63 1.32 0.64 0.78
14 A' 1138 1094 5.77 8.86 0.10 0.18
15 A' 1075 1034 117.66 2.45 0.71 0.83
16 A' 1011 972 9.96 1.54 0.15 0.26
17 A' 950 913 11.67 2.41 0.12 0.21
18 A' 855 823 10.36 8.36 0.19 0.32
19 A' 636 612 6.24 8.48 0.20 0.33
20 A' 427 411 0.91 0.35 0.66 0.79
21 A' 367 353 8.64 3.58 0.21 0.35
22 A' 194 187 5.64 0.39 0.54 0.71
23 A" 3157 3036 37.90 10.25 0.75 0.86
24 A" 3151 3031 4.89 51.86 0.75 0.86
25 A" 3132 3012 1.92 83.74 0.75 0.86
26 A" 1475 1419 6.25 5.13 0.75 0.86
27 A" 1467 1411 7.56 4.40 0.75 0.86
28 A" 1290 1241 1.07 3.65 0.75 0.86
29 A" 1176 1131 3.22 0.42 0.75 0.86
30 A" 1057 1016 4.62 0.08 0.75 0.86
31 A" 811 780 0.52 0.21 0.75 0.86
32 A" 604 581 4.88 0.38 0.75 0.86
33 A" 264 254 0.97 0.02 0.75 0.86
34 A" 154 148 4.79 0.03 0.75 0.86
35 A" 70 67 0.38 0.21 0.75 0.86
36 A" 46 44 0.33 0.11 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25873.8 cm-1
Scaled (by 0.9618) Zero Point Vibrational Energy (zpe) 24885.4 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/aug-cc-pVDZ
ABC
0.27936 0.06928 0.05731

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.319 0.031 0.000
C2 -0.914 -0.516 0.000
O3 0.000 0.486 0.000
O4 -0.615 -1.695 0.000
C5 1.389 0.064 0.000
C6 2.240 1.317 0.000
H7 -3.030 -0.799 0.000
H8 -2.472 0.661 0.885
H9 -2.472 0.661 -0.885
H10 1.565 -0.557 0.887
H11 1.565 -0.557 -0.887
H12 3.302 1.038 0.000
H13 2.042 1.926 -0.891
H14 2.042 1.926 0.891

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50712.36272.42563.70764.73661.09291.09731.09734.02654.02655.71024.83694.8369
C21.50711.35661.21652.37543.64882.13432.14392.14392.63352.63354.49403.93673.9367
O32.36271.35662.26611.45152.38953.29092.63182.63182.07912.07913.34812.65272.6527
O42.42561.21652.26612.66664.15062.57633.12823.12822.61432.61434.77654.57884.5788
C53.70762.37541.45152.66661.51504.50234.00604.00601.09721.09722.14692.16492.1649
C64.73663.64882.38954.15061.51505.67904.83954.83952.18082.18081.09821.09721.0972
H71.09292.13433.29092.57634.50235.67901.79571.79574.68594.68596.59325.82575.8257
H81.09732.14392.63183.12824.00604.83951.79571.77094.21654.57415.85415.01324.6878
H91.09732.14392.63183.12824.00604.83951.79571.77094.57414.21655.85414.68785.0132
H104.02652.63352.07912.61431.09722.18084.68594.21654.57411.77482.51993.09102.5280
H114.02652.63352.07912.61431.09722.18084.68594.57414.21651.77482.51992.52803.0910
H125.71024.49403.34814.77652.14691.09826.59325.85415.85412.51992.51991.78091.7809
H134.83693.93672.65274.57882.16491.09725.82575.01324.68783.09102.52801.78091.7825
H144.83693.93672.65274.57882.16491.09725.82574.68785.01322.52803.09101.78091.7825

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 111.073 C1 C2 O4 125.562
C2 C1 H7 109.309 C2 C1 H8 109.812
C2 C1 H9 109.812 C2 O3 C5 115.491
O3 C2 O4 123.365 O3 C5 C6 107.296
O3 C5 H10 108.523 O3 C5 H11 108.523
C5 C6 H12 109.449 C5 C6 H13 110.926
C5 C6 H14 110.926 C6 C5 H10 112.214
C6 C5 H11 112.214 H7 C1 H8 110.145
H7 C1 H9 110.145 H8 C1 H9 107.600
H10 C5 H11 107.957 H12 C6 H13 108.418
H12 C6 H14 108.418 H13 C6 H14 108.630
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability