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

using model chemistry: MP2=FULL/3-21G*

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/3-21G*
 hartrees
Energy at 0K-304.785962
Energy at 298.15K 
HF Energy-304.165792
Nuclear repulsion energy239.488615
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/3-21G*
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' 3214 3047 6.43 57.78 0.72 0.84
2 A' 3177 3012 17.94 58.08 0.75 0.86
3 A' 3114 2952 2.15 73.37 0.00 0.00
4 A' 3111 2949 11.31 94.34 0.10 0.18
5 A' 3103 2941 11.16 81.28 0.03 0.07
6 A' 1722 1632 94.84 2.60 0.45 0.62
7 A' 1617 1533 5.43 1.79 0.74 0.85
8 A' 1603 1520 4.94 30.10 0.75 0.85
9 A' 1572 1491 20.55 20.61 0.75 0.85
10 A' 1497 1419 7.89 5.35 0.67 0.80
11 A' 1473 1396 23.67 4.28 0.70 0.82
12 A' 1445 1370 4.47 3.90 0.75 0.85
13 A' 1252 1187 380.25 0.50 0.75 0.85
14 A' 1166 1105 7.98 7.31 0.19 0.32
15 A' 1073 1017 148.38 3.15 0.36 0.53
16 A' 1028 975 0.63 4.15 0.52 0.69
17 A' 923 875 3.61 1.84 0.74 0.85
18 A' 830 787 15.78 14.86 0.25 0.40
19 A' 626 594 6.46 11.06 0.32 0.49
20 A' 410 388 0.20 0.40 0.60 0.75
21 A' 356 338 10.79 2.90 0.37 0.54
22 A' 186 176 4.60 0.28 0.63 0.77
23 A" 3193 3027 26.63 22.38 0.75 0.86
24 A" 3185 3020 3.76 49.78 0.75 0.86
25 A" 3154 2990 12.82 67.62 0.75 0.86
26 A" 1592 1509 5.41 23.69 0.75 0.86
27 A" 1582 1500 8.74 21.90 0.75 0.86
28 A" 1340 1270 0.09 13.24 0.75 0.86
29 A" 1221 1157 4.37 5.42 0.75 0.86
30 A" 1124 1066 7.11 1.05 0.75 0.86
31 A" 862 817 1.03 0.09 0.75 0.86
32 A" 594 563 4.82 1.46 0.75 0.86
33 A" 270 256 1.59 0.00 0.75 0.86
34 A" 152 144 5.70 0.00 0.75 0.86
35 A" 99 94 1.10 0.10 0.75 0.86
36 A" 39 37 0.12 0.43 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26450.6 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 25075.2 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 MP2=FULL/3-21G*
ABC
0.26636 0.06821 0.05602

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.339 0.058 0.000
C2 -0.938 -0.532 0.000
O3 0.000 0.501 0.000
O4 -0.619 -1.729 0.000
C5 1.423 0.044 0.000
C6 2.253 1.331 0.000
H7 -3.065 -0.755 0.000
H8 -2.471 0.685 0.886
H9 -2.471 0.685 -0.886
H10 1.607 -0.570 0.886
H11 1.607 -0.570 -0.886
H12 3.322 1.093 0.000
H13 2.017 1.922 -0.888
H14 2.017 1.922 0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.52022.38042.48003.76194.76491.09041.09321.09324.09284.09285.75424.82044.8204
C21.52021.39551.23822.43053.69512.13872.14842.14842.69542.69544.55923.94283.9428
O32.38041.39552.31401.49452.40103.31252.63132.63132.12462.12463.37392.62242.6224
O42.48001.23822.31402.70464.19662.63253.16833.16832.66212.66214.84714.59004.5900
C53.76192.43051.49452.70461.53114.55884.04444.04441.09351.09352.16902.16062.1606
C64.76493.69512.40104.19661.53115.71254.84934.84932.19412.19411.09471.09261.0926
H71.09042.13873.31252.63254.55885.71251.79201.79204.75934.75936.64875.81245.8124
H81.09322.14842.63133.16834.04444.84931.79201.77224.26654.62005.87394.98194.6552
H91.09322.14842.63133.16834.04444.84931.79201.77224.62004.26655.87394.65524.9819
H104.09282.69542.12462.66211.09352.19414.75934.26654.62001.77222.54743.08612.5252
H114.09282.69542.12462.66211.09352.19414.75934.62004.26651.77222.54742.52523.0861
H125.75424.55923.37394.84712.16901.09476.64875.87395.87392.54742.54741.78251.7825
H134.82043.94282.62244.59002.16061.09265.81244.98194.65523.08612.52521.78251.7760
H144.82043.94282.62244.59002.16061.09265.81244.65524.98192.52523.08611.78251.7760

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 109.381 C1 C2 O4 127.778
C2 C1 H7 108.904 C2 C1 H8 109.502
C2 C1 H9 109.502 C2 O3 C5 114.453
O3 C2 O4 122.842 O3 C5 C6 105.031
O3 C5 H10 109.381 O3 C5 H11 109.381
C5 C6 H12 110.280 C5 C6 H13 109.737
C5 C6 H14 109.737 C6 C5 H10 112.359
C6 C5 H11 112.359 H7 C1 H8 110.307
H7 C1 H9 110.307 H8 C1 H9 108.305
H10 C5 H11 108.251 H12 C6 H13 109.162
H12 C6 H14 109.162 H13 C6 H14 108.735
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability