return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CID/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 CID/6-31G
 hartrees
Energy at 0K-306.267895
Energy at 298.15K 
HF Energy-305.730014
Nuclear repulsion energy240.869745
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 CID/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' 3256 3045 8.02      
2 A' 3206 2998 27.75      
3 A' 3156 2952 10.75      
4 A' 3145 2941 3.31      
5 A' 3129 2926 17.90      
6 A' 1812 1695 215.41      
7 A' 1621 1516 4.95      
8 A' 1599 1495 5.05      
9 A' 1576 1474 18.57      
10 A' 1528 1429 6.65      
11 A' 1516 1418 38.01      
12 A' 1491 1394 0.27      
13 A' 1352 1264 466.07      
14 A' 1202 1124 8.48      
15 A' 1133 1060 117.43      
16 A' 1082 1012 4.99      
17 A' 983 920 17.30      
18 A' 878 822 13.05      
19 A' 660 617 11.90      
20 A' 438 410 0.95      
21 A' 374 349 11.24      
22 A' 191 179 6.86      
23 A" 3226 3017 44.82      
24 A" 3219 3011 5.34      
25 A" 3199 2992 3.93      
26 A" 1587 1484 6.28      
27 A" 1575 1473 10.42      
28 A" 1359 1271 0.09      
29 A" 1251 1170 7.21      
30 A" 1148 1074 9.41      
31 A" 869 813 0.33      
32 A" 614 574 12.45      
33 A" 264 247 2.12      
34 A" 152 142 8.54      
35 A" 97 91 0.53      
36 A" 59 55 0.49      

Unscaled Zero Point Vibrational Energy (zpe) 26973.1 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 25225.2 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 CID/6-31G
ABC
0.27499 0.06797 0.05622

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.328 -0.025 0.000
C2 -0.919 -0.551 0.000
O3 0.000 0.464 0.000
O4 -0.594 -1.737 0.000
C5 1.428 0.104 0.000
C6 2.203 1.412 0.000
H7 -3.024 -0.861 0.000
H8 -2.491 0.597 0.882
H9 -2.491 0.597 -0.882
H10 1.633 -0.502 0.884
H11 1.633 -0.502 -0.884
H12 3.278 1.210 0.000
H13 1.959 2.002 -0.886
H14 1.959 2.002 0.886

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50382.37902.43643.75844.75361.08801.09171.09174.08624.08625.74004.82424.8242
C21.50381.36981.22952.43723.68842.12742.13722.13722.70132.70134.55133.94813.9481
O32.37901.36982.28011.47272.39833.30182.64632.64632.09302.09303.36122.64322.6432
O42.43641.22952.28012.73514.21232.58243.13423.13422.69582.69584.86564.61344.6134
C53.75842.43721.47272.73511.52034.55554.04764.04761.09111.09112.15462.16032.1603
C64.75363.68842.39834.21231.52035.70004.84574.84572.18412.18411.09351.09151.0915
H71.08802.12743.30182.58244.55555.70001.78561.78564.75354.75356.63315.81495.8149
H81.09172.13722.64633.13424.04764.84571.78561.76454.26814.61905.86814.99064.6670
H91.09172.13722.64633.13424.04764.84571.78561.76454.61904.26815.86814.66704.9906
H104.08622.70132.09302.69581.09112.18414.75354.26814.61901.76762.53293.08322.5249
H114.08622.70132.09302.69581.09112.18414.75354.61904.26811.76762.53292.52493.0832
H125.74004.55133.36124.86562.15461.09356.63315.86815.86812.53292.53291.77491.7749
H134.82423.94812.64324.61342.16031.09155.81494.99064.66703.08322.52491.77491.7712
H144.82423.94812.64324.61342.16031.09155.81494.66704.99062.52493.08321.77491.7712

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 111.678 C1 C2 O4 125.800
C2 C1 H7 109.279 C2 C1 H8 109.843
C2 C1 H9 109.843 C2 O3 C5 118.010
O3 C2 O4 122.521 O3 C5 C6 106.497
O3 C5 H10 108.529 O3 C5 H11 108.529
C5 C6 H12 109.960 C5 C6 H13 110.538
C5 C6 H14 110.538 C6 C5 H10 112.478
C6 C5 H11 112.478 H7 C1 H8 110.014
H7 C1 H9 110.014 H8 C1 H9 107.831
H10 C5 H11 108.194 H12 C6 H13 108.643
H12 C6 H14 108.643 H13 C6 H14 108.463
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability