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

using model chemistry: MP2/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-306.825365
Energy at 298.15K 
HF Energy-305.892573
Nuclear repulsion energy243.003122
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 MP2/6-31+G**
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' 3269 3075 4.65 55.57 0.72 0.84
2 A' 3224 3033 18.60 64.89 0.74 0.85
3 A' 3146 2960 17.18 73.41 0.09 0.17
4 A' 3141 2955 2.04 148.13 0.00 0.01
5 A' 3129 2943 15.99 130.12 0.01 0.02
6 A' 1790 1684 238.21 12.81 0.27 0.42
7 A' 1562 1469 4.05 1.87 0.56 0.72
8 A' 1545 1453 3.92 11.74 0.72 0.84
9 A' 1521 1430 14.40 8.92 0.69 0.82
10 A' 1470 1383 5.25 3.15 0.62 0.76
11 A' 1444 1359 56.95 0.61 0.62 0.77
12 A' 1422 1337 7.45 1.99 0.72 0.83
13 A' 1298 1221 424.74 0.49 0.73 0.84
14 A' 1165 1096 6.00 8.31 0.14 0.24
15 A' 1105 1039 103.19 3.50 0.61 0.76
16 A' 1039 977 10.21 1.77 0.21 0.35
17 A' 967 910 11.06 2.28 0.24 0.39
18 A' 872 820 15.48 9.61 0.21 0.35
19 A' 642 604 6.90 7.96 0.26 0.42
20 A' 435 409 0.69 0.38 0.72 0.84
21 A' 372 350 8.23 2.90 0.25 0.40
22 A' 197 185 5.73 0.29 0.57 0.73
23 A" 3239 3047 27.41 22.50 0.75 0.86
24 A" 3235 3043 3.40 50.88 0.75 0.86
25 A" 3206 3016 7.53 70.32 0.75 0.86
26 A" 1531 1440 7.27 9.54 0.75 0.86
27 A" 1520 1430 9.14 8.08 0.75 0.86
28 A" 1315 1237 0.82 7.79 0.75 0.86
29 A" 1206 1134 3.82 1.17 0.75 0.86
30 A" 1083 1019 3.19 0.13 0.75 0.86
31 A" 830 781 0.16 0.31 0.75 0.86
32 A" 603 567 5.33 1.11 0.75 0.86
33 A" 273 257 1.08 0.02 0.75 0.86
34 A" 153 144 5.68 0.01 0.75 0.86
35 A" 64 60 0.20 0.41 0.75 0.86
36 A" 26 25 0.48 0.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26518.6 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 24943.4 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 MP2/6-31+G**
ABC
0.27825 0.06974 0.05755

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.312 0.032 0.000
C2 -0.913 -0.517 0.000
O3 0.000 0.491 0.000
O4 -0.609 -1.702 0.000
C5 1.387 0.064 0.000
C6 2.230 1.317 0.000
H7 -3.019 -0.791 0.000
H8 -2.462 0.655 0.880
H9 -2.462 0.655 -0.880
H10 1.561 -0.551 0.883
H11 1.561 -0.551 -0.883
H12 3.286 1.047 0.000
H13 2.026 1.918 -0.885
H14 2.026 1.918 0.885

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50362.35722.43093.69934.72021.08541.08871.08874.01524.01525.68944.81204.8120
C21.50361.35951.22312.37183.63852.12422.13292.13292.62672.62674.48043.91713.9171
O32.35721.35952.27531.45102.37803.27992.61962.61962.07392.07393.33272.63112.6311
O42.43091.22312.27532.66474.14382.57653.12483.12482.61002.61004.76704.56314.5631
C53.69932.37181.45102.66471.51024.48833.99223.99221.08981.08982.13832.15082.1508
C64.72023.63852.37804.14381.51025.65654.81914.81912.17162.17161.09021.08851.0885
H71.08542.12423.27992.57654.48835.65651.78271.78274.67074.67076.56755.79415.7941
H81.08872.13292.61963.12483.99224.81911.78271.76044.19994.55495.82804.98474.6617
H91.08872.13292.61963.12483.99224.81911.78271.76044.55494.19995.82804.66174.9847
H104.01522.62672.07392.61001.08982.17164.67074.19994.55491.76542.51143.07132.5116
H114.01522.62672.07392.61001.08982.17164.67074.55494.19991.76542.51142.51163.0713
H125.68944.48043.33274.76702.13831.09026.56755.82805.82802.51142.51141.76881.7688
H134.81203.91712.63114.56312.15081.08855.79414.98474.66173.07132.51161.76881.7698
H144.81203.91712.63114.56312.15081.08855.79414.66174.98472.51163.07131.76881.7698

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 110.733 C1 C2 O4 125.819
C2 C1 H7 109.200 C2 C1 H8 109.695
C2 C1 H9 109.695 C2 O3 C5 115.071
O3 C2 O4 123.447 O3 C5 C6 106.830
O3 C5 H10 108.582 O3 C5 H11 108.582
C5 C6 H12 109.578 C5 C6 H13 110.669
C5 C6 H14 110.669 C6 C5 H10 112.273
C6 C5 H11 112.273 H7 C1 H8 110.168
H7 C1 H9 110.168 H8 C1 H9 107.899
H10 C5 H11 108.182 H12 C6 H13 108.551
H12 C6 H14 108.551 H13 C6 H14 108.767
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability