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

using model chemistry: B2PLYP=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 B2PLYP=FULL/3-21G*
 hartrees
Energy at 0K-305.598986
Energy at 298.15K 
HF Energy-305.388649
Nuclear repulsion energy240.412636
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/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' 3206 3206 6.40 62.64 0.68 0.81
2 A' 3162 3162 20.00 63.38 0.73 0.84
3 A' 3105 3105 12.37 58.05 0.15 0.27
4 A' 3104 3104 0.28 121.59 0.01 0.02
5 A' 3093 3093 12.12 90.62 0.03 0.05
6 A' 1740 1740 124.22 1.65 0.53 0.70
7 A' 1599 1599 6.44 0.75 0.74 0.85
8 A' 1586 1586 5.01 31.09 0.75 0.86
9 A' 1552 1552 20.79 19.99 0.75 0.85
10 A' 1484 1484 8.77 5.31 0.66 0.80
11 A' 1460 1460 28.08 5.18 0.68 0.81
12 A' 1429 1429 2.94 4.24 0.75 0.85
13 A' 1248 1248 373.47 0.46 0.32 0.48
14 A' 1158 1158 9.74 6.62 0.17 0.29
15 A' 1065 1065 147.74 2.28 0.50 0.67
16 A' 1026 1026 1.07 3.45 0.54 0.70
17 A' 926 926 4.13 1.48 0.63 0.77
18 A' 830 830 10.74 16.18 0.26 0.42
19 A' 625 625 5.80 10.71 0.33 0.49
20 A' 408 408 0.33 0.36 0.60 0.75
21 A' 356 356 11.88 3.03 0.36 0.53
22 A' 185 185 4.90 0.29 0.66 0.79
23 A" 3176 3176 31.32 15.53 0.75 0.86
24 A" 3166 3166 3.74 53.32 0.75 0.86
25 A" 3144 3144 7.43 80.70 0.75 0.86
26 A" 1575 1575 6.47 24.07 0.75 0.86
27 A" 1565 1565 9.89 21.85 0.75 0.86
28 A" 1327 1327 0.07 13.01 0.75 0.86
29 A" 1205 1205 4.77 5.09 0.75 0.86
30 A" 1115 1115 8.87 0.62 0.75 0.86
31 A" 854 854 1.47 0.09 0.75 0.86
32 A" 597 597 4.75 1.51 0.75 0.86
33 A" 261 261 1.70 0.00 0.75 0.86
34 A" 153 153 5.63 0.00 0.75 0.86
35 A" 82 82 1.09 0.10 0.75 0.86
36 A" 31 31 0.25 0.38 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26297.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 26297.5 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/3-21G*
ABC
0.26858 0.06868 0.05642

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.328 0.061 0.000
C2 -0.935 -0.532 0.000
O3 0.000 0.492 0.000
O4 -0.621 -1.722 0.000
C5 1.420 0.045 0.000
C6 2.245 1.328 0.000
H7 -3.061 -0.744 0.000
H8 -2.457 0.690 0.883
H9 -2.457 0.690 -0.883
H10 1.602 -0.569 0.884
H11 1.602 -0.569 -0.884
H12 3.312 1.092 0.000
H13 2.011 1.920 -0.887
H14 2.011 1.920 0.887

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.51382.36782.46813.74804.74541.08821.09211.09214.07744.07745.73364.80304.8030
C21.51381.38631.23092.42443.68372.13632.14202.14202.68722.68724.54663.93373.9337
O32.36781.38632.29901.48842.39543.30092.61842.61842.11492.11493.36572.62082.6208
O42.46811.23092.29902.69924.18502.62843.15713.15712.65602.65604.83564.57984.5798
C53.74802.42441.48842.69921.52554.54954.02804.02801.09161.09162.16242.15682.1568
C64.74543.68372.39544.18501.52555.69584.82624.82622.18912.18911.09301.09151.0915
H71.08822.13633.30092.62844.54955.69581.78921.78924.74924.74926.63185.79675.7967
H81.09212.14202.61843.15714.02804.82621.78921.76634.24964.60255.84984.96014.6337
H91.09212.14202.61843.15714.02804.82621.78921.76634.60254.24965.84984.63374.9601
H104.07742.68722.11492.65601.09162.18914.74924.24964.60251.76892.54203.08162.5219
H114.07742.68722.11492.65601.09162.18914.74924.60254.24961.76892.54202.52193.0816
H125.73364.54663.36574.83562.16241.09306.63185.84985.84982.54202.54201.77921.7792
H134.80303.93372.62084.57982.15681.09155.79674.96014.63373.08162.52191.77921.7730
H144.80303.93372.62084.57982.15681.09155.79674.63374.96012.52193.08161.77921.7730

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 109.390 C1 C2 O4 127.814
C2 C1 H7 109.285 C2 C1 H8 109.507
C2 C1 H9 109.507 C2 O3 C5 114.948
O3 C2 O4 122.796 O3 C5 C6 105.263
O3 C5 H10 109.145 O3 C5 H11 109.145
C5 C6 H12 110.245 C5 C6 H13 109.893
C5 C6 H14 109.893 C6 C5 H10 112.476
C6 C5 H11 112.476 H7 C1 H8 110.296
H7 C1 H9 110.296 H8 C1 H9 107.931
H10 C5 H11 108.236 H12 C6 H13 109.075
H12 C6 H14 109.075 H13 C6 H14 108.628
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability