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

using model chemistry: CCSD/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 CCSD/6-31G*
 hartrees
Energy at 0K-306.789987
Energy at 298.15K 
HF Energy-305.873349
Nuclear repulsion energy243.248180
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 CCSD/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' 3207 3029 7.03      
2 A' 3159 2983 23.38      
3 A' 3099 2926 14.94      
4 A' 3095 2922 1.70      
5 A' 3081 2910 14.82      
6 A' 1870 1765 220.72      
7 A' 1573 1485 3.78      
8 A' 1549 1463 3.00      
9 A' 1526 1441 11.82      
10 A' 1483 1400 4.76      
11 A' 1459 1377 82.92      
12 A' 1432 1353 5.66      
13 A' 1335 1261 406.93      
14 A' 1176 1110 16.63      
15 A' 1123 1060 78.99      
16 A' 1047 989 6.15      
17 A' 977 923 7.16      
18 A' 891 841 10.30      
19 A' 653 617 9.47      
20 A' 436 412 0.80      
21 A' 379 358 10.22      
22 A' 200 189 5.19      
23 A" 3170 2994 36.91      
24 A" 3168 2992 5.02      
25 A" 3142 2967 7.90      
26 A" 1538 1452 5.43      
27 A" 1525 1440 8.18      
28 A" 1325 1251 0.44      
29 A" 1219 1151 4.83      
30 A" 1098 1037 6.53      
31 A" 834 788 0.27      
32 A" 611 577 7.47      
33 A" 275 259 1.08      
34 A" 155 146 4.87      
35 A" 84 79 0.12      
36 A" 70 66 0.63      

Unscaled Zero Point Vibrational Energy (zpe) 26480.4 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 25005.5 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 CCSD/6-31G*
ABC
0.27934 0.06986 0.05770

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.312 0.029 0.000
C2 -0.907 -0.519 0.000
O3 0.000 0.485 0.000
O4 -0.606 -1.694 0.000
C5 1.382 0.062 0.000
C6 2.227 1.320 0.000
H7 -3.022 -0.800 0.000
H8 -2.465 0.657 0.884
H9 -2.465 0.657 -0.884
H10 1.565 -0.558 0.885
H11 1.565 -0.558 -0.885
H12 3.291 1.056 0.000
H13 2.018 1.925 -0.889
H14 2.018 1.925 0.889

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50762.35612.42453.69394.71841.09161.09531.09534.01924.01925.69604.80934.8093
C21.50761.35301.21352.36173.63352.13352.14252.14252.62582.62584.48383.91383.9138
O32.35611.35302.26231.44552.37823.28372.62402.62402.07842.07843.34032.63352.6335
O42.42451.21352.26232.65324.13692.57593.12473.12472.60552.60554.77014.55824.5582
C53.69392.36171.44552.65321.51524.48763.99163.99161.09571.09572.15212.15982.1598
C64.71843.63352.37824.13691.51525.66074.81994.81992.17892.17891.09661.09531.0953
H71.09162.13353.28372.57594.48765.66071.79301.79304.67764.67766.58015.79785.7978
H81.09532.14252.62403.12473.99164.81991.79301.76904.20854.56535.83694.98454.6584
H91.09532.14252.62403.12473.99164.81991.79301.76904.56534.20855.83694.65844.9845
H104.01922.62582.07842.60551.09572.17894.67764.20854.56531.76962.52333.08482.5239
H114.01922.62582.07842.60551.09572.17894.67764.56534.20851.76962.52332.52393.0848
H125.69604.48383.34034.77012.15211.09666.58015.83695.83692.52332.52331.77951.7795
H134.80933.91382.63354.55822.15981.09535.79784.98454.65843.08482.52391.77951.7778
H144.80933.91382.63354.55822.15981.09535.79784.65844.98452.52393.08481.77951.7778

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 110.787 C1 C2 O4 125.657
C2 C1 H7 109.287 C2 C1 H8 109.778
C2 C1 H9 109.778 C2 O3 C5 115.080
O3 C2 O4 123.556 O3 C5 C6 106.864
O3 C5 H10 108.969 O3 C5 H11 108.969
C5 C6 H12 109.940 C5 C6 H13 110.621
C5 C6 H14 110.621 C6 C5 H10 112.135
C6 C5 H11 112.135 H7 C1 H8 110.138
H7 C1 H9 110.138 H8 C1 H9 107.705
H10 C5 H11 107.701 H12 C6 H13 108.553
H12 C6 H14 108.553 H13 C6 H14 108.491
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability