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

using model chemistry: MP2=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 MP2=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-307.032754
Energy at 298.15K 
HF Energy-305.908690
Nuclear repulsion energy245.094120
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=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' 3262 3066 2.67 52.99 0.72 0.83
2 A' 3225 3032 10.70 59.79 0.73 0.85
3 A' 3137 2948 2.00 73.92 0.00 0.00
4 A' 3134 2945 11.32 83.97 0.07 0.14
5 A' 3128 2940 9.11 108.08 0.01 0.01
6 A' 1839 1728 189.74 5.32 0.29 0.45
7 A' 1557 1463 5.96 0.56 0.75 0.86
8 A' 1538 1446 2.02 17.70 0.75 0.86
9 A' 1509 1419 12.82 12.43 0.72 0.84
10 A' 1455 1367 6.41 2.89 0.75 0.85
11 A' 1430 1344 65.58 1.33 0.75 0.86
12 A' 1410 1325 18.81 1.78 0.62 0.77
13 A' 1308 1229 383.61 0.32 0.65 0.79
14 A' 1165 1095 14.07 7.17 0.11 0.20
15 A' 1122 1055 76.22 2.53 0.73 0.85
16 A' 1035 973 9.11 1.32 0.16 0.28
17 A' 977 918 4.88 1.98 0.19 0.32
18 A' 885 831 8.56 8.98 0.26 0.41
19 A' 653 614 7.51 6.84 0.30 0.46
20 A' 431 405 0.56 0.26 0.73 0.84
21 A' 376 353 9.71 2.20 0.28 0.44
22 A' 199 187 4.64 0.27 0.60 0.75
23 A" 3234 3040 15.17 26.85 0.75 0.86
24 A" 3228 3034 1.39 48.20 0.75 0.86
25 A" 3190 2998 9.26 57.13 0.75 0.86
26 A" 1530 1438 5.61 14.87 0.75 0.86
27 A" 1518 1427 7.38 12.12 0.75 0.86
28 A" 1328 1249 0.85 7.62 0.75 0.86
29 A" 1208 1135 4.25 1.15 0.75 0.86
30 A" 1089 1023 6.36 0.21 0.75 0.86
31 A" 827 777 0.85 0.21 0.75 0.86
32 A" 627 590 4.07 0.94 0.75 0.86
33 A" 280 263 0.93 0.00 0.75 0.86
34 A" 160 151 3.87 0.02 0.75 0.86
35 A" 81 76 0.03 0.21 0.75 0.86
36 A" 69 65 0.66 0.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26571.7 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 24974.8 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=FULL/6-31G(2df,p)
ABC
0.28200 0.07123 0.05872

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.292 0.050 0.000
C2 -0.901 -0.508 0.000
O3 0.000 0.490 0.000
O4 -0.608 -1.678 0.000
C5 1.363 0.048 0.000
C6 2.221 1.288 0.000
H7 -3.009 -0.763 0.000
H8 -2.436 0.677 0.878
H9 -2.436 0.677 -0.878
H10 1.538 -0.573 0.879
H11 1.538 -0.573 -0.879
H12 3.274 1.013 0.000
H13 2.020 1.891 -0.883
H14 2.020 1.891 0.883

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.49882.33342.41293.65504.67871.08461.08801.08803.97803.97805.64844.77054.7705
C21.49881.34411.20622.33113.60072.12422.12862.12862.59272.59274.44313.88113.8811
O32.33341.34412.25151.43342.35953.25982.59592.59592.06552.06553.31562.61192.6119
O42.41291.20622.25152.61974.09792.57023.10763.10762.56842.56844.72334.51884.5188
C53.65502.33111.43342.61971.50734.44733.94983.94981.08961.08962.14082.14642.1464
C64.67873.60072.35954.09791.50735.61764.77774.77772.16762.16761.08871.08771.0877
H71.08462.12423.25982.57024.44735.61761.78091.78094.63524.63526.52975.75485.7548
H81.08802.12862.59593.10763.94984.77771.78091.75564.16544.52075.78694.94274.6185
H91.08802.12862.59593.10763.94984.77771.78091.75564.52074.16545.78694.61854.9427
H103.97802.59272.06552.56841.08962.16764.63524.16544.52071.75742.51023.06642.5099
H113.97802.59272.06552.56841.08962.16764.63524.52074.16541.75742.51022.50993.0664
H125.64844.44313.31564.72332.14081.08876.52975.78695.78692.51022.51021.76681.7668
H134.77053.88112.61194.51882.14641.08775.75484.94274.61853.06642.50991.76681.7657
H144.77053.88112.61194.51882.14641.08775.75484.61854.94272.50993.06641.76681.7657

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 110.206 C1 C2 O4 125.914
C2 C1 H7 109.580 C2 C1 H8 109.724
C2 C1 H9 109.724 C2 O3 C5 114.090
O3 C2 O4 123.880 O3 C5 C6 106.683
O3 C5 H10 109.143 O3 C5 H11 109.143
C5 C6 H12 110.059 C5 C6 H13 110.563
C5 C6 H14 110.563 C6 C5 H10 112.160
C6 C5 H11 112.160 H7 C1 H8 110.111
H7 C1 H9 110.111 H8 C1 H9 107.565
H10 C5 H11 107.500 H12 C6 H13 108.540
H12 C6 H14 108.540 H13 C6 H14 108.514
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability