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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G*
 hartrees
Energy at 0K-306.768759
Energy at 298.15K 
HF Energy-305.872882
Nuclear repulsion energy243.404087
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*
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' 3251 3063 4.40 58.01 0.71 0.83
2 A' 3211 3025 16.25 64.04 0.74 0.85
3 A' 3130 2949 15.14 17.72 0.34 0.51
4 A' 3129 2948 0.36 153.80 0.02 0.04
5 A' 3120 2940 11.68 98.37 0.01 0.03
6 A' 1834 1728 184.72 5.60 0.35 0.52
7 A' 1582 1490 4.67 1.04 0.75 0.86
8 A' 1563 1472 3.07 22.50 0.75 0.86
9 A' 1537 1448 13.04 14.66 0.74 0.85
10 A' 1484 1399 5.64 5.29 0.75 0.86
11 A' 1459 1375 67.81 2.46 0.75 0.86
12 A' 1434 1351 6.70 2.76 0.64 0.78
13 A' 1319 1242 410.03 0.28 0.65 0.79
14 A' 1177 1109 11.78 7.32 0.18 0.30
15 A' 1118 1053 91.29 3.31 0.67 0.80
16 A' 1047 987 7.80 1.69 0.25 0.40
17 A' 975 919 8.46 2.05 0.29 0.45
18 A' 883 832 11.65 10.18 0.29 0.45
19 A' 650 612 7.70 7.55 0.33 0.50
20 A' 436 411 0.64 0.39 0.71 0.83
21 A' 377 355 9.63 2.58 0.33 0.49
22 A' 200 188 5.05 0.27 0.63 0.77
23 A" 3223 3037 23.43 27.83 0.75 0.86
24 A" 3216 3030 3.17 52.75 0.75 0.86
25 A" 3185 3001 11.71 64.97 0.75 0.86
26 A" 1552 1462 6.13 18.97 0.75 0.86
27 A" 1539 1450 9.01 16.16 0.75 0.86
28 A" 1331 1254 0.30 11.46 0.75 0.86
29 A" 1223 1152 4.59 2.06 0.75 0.86
30 A" 1098 1034 6.23 1.00 0.75 0.86
31 A" 839 791 0.57 0.19 0.75 0.86
32 A" 610 575 5.50 1.46 0.75 0.86
33 A" 282 266 1.04 0.01 0.75 0.86
34 A" 158 149 4.70 0.01 0.75 0.86
35 A" 78 74 0.06 0.35 0.75 0.86
36 A" 66 62 0.77 0.08 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26656.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 25115.8 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*
ABC
0.27855 0.07015 0.05786

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.307 0.037 0.000
C2 -0.908 -0.515 0.000
O3 0.000 0.492 0.000
O4 -0.606 -1.696 0.000
C5 1.380 0.059 0.000
C6 2.226 1.310 0.000
H7 -3.018 -0.787 0.000
H8 -2.458 0.663 0.882
H9 -2.458 0.663 -0.882
H10 1.558 -0.561 0.883
H11 1.558 -0.561 -0.883
H12 3.286 1.044 0.000
H13 2.019 1.913 -0.886
H14 2.019 1.913 0.886

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50332.35122.42753.68694.70821.08881.09211.09214.00864.00865.68294.79824.7982
C21.50331.35621.21862.35963.62732.12752.13712.13712.61962.61964.47503.90593.9059
O32.35121.35622.27021.44632.37173.27822.61692.61692.07672.07673.33232.62382.6238
O42.42751.21862.27022.65104.13042.57743.12583.12582.59842.59844.76024.55054.5505
C53.68692.35961.44632.65101.51014.47933.98413.98411.09321.09322.14532.15212.1521
C64.70823.62732.37174.13041.51015.64834.80994.80992.17402.17401.09331.09171.0917
H71.08882.12753.27822.57744.47935.64831.78761.78764.66594.66596.56525.78435.7843
H81.09212.13712.61693.12583.98414.80991.78761.76354.19784.55365.82394.97354.6486
H91.09212.13712.61693.12583.98414.80991.78761.76354.55364.19785.82394.64864.9735
H104.00862.61962.07672.59841.09322.17404.66594.19784.55361.76562.51823.07622.5165
H114.00862.61962.07672.59841.09322.17404.66594.55364.19781.76562.51822.51653.0762
H125.68294.47503.33234.76022.14531.09336.56525.82395.82392.51822.51821.77391.7739
H134.79823.90592.62384.55052.15211.09175.78434.97354.64863.07622.51651.77391.7727
H144.79823.90592.62384.55052.15211.09175.78434.64864.97352.51653.07621.77391.7727

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 110.509 C1 C2 O4 125.888
C2 C1 H7 109.272 C2 C1 H8 109.840
C2 C1 H9 109.840 C2 O3 C5 114.659
O3 C2 O4 123.603 O3 C5 C6 106.668
O3 C5 H10 108.929 O3 C5 H11 108.929
C5 C6 H12 109.947 C5 C6 H13 110.583
C5 C6 H14 110.583 C6 C5 H10 112.262
C6 C5 H11 112.262 H7 C1 H8 110.098
H7 C1 H9 110.098 H8 C1 H9 107.676
H10 C5 H11 107.713 H12 C6 H13 108.552
H12 C6 H14 108.552 H13 C6 H14 108.566
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability