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

using model chemistry: MP4=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 MP4=FULL/6-31G*
 hartrees
Energy at 0K-306.846204
Energy at 298.15K 
HF Energy-305.871420
Nuclear repulsion energy242.616428
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 MP4=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' 3195 3073        
2 A' 3153 3032        
3 A' 3082 2963        
4 A' 3081 2962        
5 A' 3071 2953        
6 A' 1797 1728        
7 A' 1563 1503        
8 A' 1543 1484        
9 A' 1519 1460        
10 A' 1469 1413        
11 A' 1444 1388        
12 A' 1419 1364        
13 A' 1301 1251        
14 A' 1163 1118        
15 A' 1101 1059        
16 A' 1034 995        
17 A' 958 921        
18 A' 869 836        
19 A' 639 615        
20 A' 430 413        
21 A' 372 358        
22 A' 197 190        
23 A" 3165 3044        
24 A" 3160 3038        
25 A" 3129 3009        
26 A" 1533 1474        
27 A" 1520 1461        
28 A" 1313 1263        
29 A" 1209 1163        
30 A" 1084 1042        
31 A" 829 797        
32 A" 599 576        
33 A" 275 264        
34 A" 157 151        
35 A" 70 68        
36 A" 36 35        

Unscaled Zero Point Vibrational Energy (zpe) 26238.5 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 25231.0 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 MP4=FULL/6-31G*
ABC
0.27658 0.06974 0.05751

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.314 0.041 0.000
C2 -0.912 -0.515 0.000
O3 0.000 0.495 0.000
O4 -0.609 -1.700 0.000
C5 1.383 0.057 0.000
C6 2.236 1.309 0.000
H7 -3.031 -0.784 0.000
H8 -2.465 0.670 0.885
H9 -2.465 0.670 -0.885
H10 1.558 -0.566 0.886
H11 1.558 -0.566 -0.886
H12 3.299 1.037 0.000
H13 2.031 1.915 -0.890
H14 2.031 1.915 0.890

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50882.35842.43693.69754.72351.09301.09621.09624.01894.01895.70144.81554.8155
C21.50881.36091.22272.36533.63812.13632.14492.14492.62482.62484.48833.91943.9194
O32.35841.36092.27801.45082.37943.29002.62472.62472.08312.08313.34362.63352.6335
O42.43691.22272.27802.65654.14112.58943.13763.13762.60202.60204.77204.56454.5645
C53.69752.36531.45082.65651.51474.49383.99573.99571.09711.09712.15252.15982.1598
C64.72353.63812.37944.14111.51475.66774.82574.82572.18142.18141.09741.09591.0959
H71.09302.13633.29002.58944.49385.66771.79411.79414.67954.67956.58745.80585.8058
H81.09622.14492.62473.13763.99574.82571.79411.76994.20894.56625.84314.99144.6653
H91.09622.14492.62473.13763.99574.82571.79411.76994.56624.20895.84314.66534.9914
H104.01892.62482.08312.60201.09712.18144.67954.20894.56621.77172.52723.08742.5258
H114.01892.62482.08312.60201.09712.18144.67954.56624.20891.77172.52722.52583.0874
H125.70144.48833.34364.77202.15251.09746.58745.84315.84312.52722.52721.78021.7802
H134.81553.91942.63354.56452.15981.09595.80584.99144.66533.08742.52581.78021.7793
H144.81553.91942.63354.56452.15981.09595.80584.66534.99142.52583.08741.78021.7793

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 110.428 C1 C2 O4 125.965
C2 C1 H7 109.352 C2 C1 H8 109.832
C2 C1 H9 109.832 C2 O3 C5 114.498
O3 C2 O4 123.607 O3 C5 C6 106.695
O3 C5 H10 108.891 O3 C5 H11 108.891
C5 C6 H12 109.955 C5 C6 H13 110.622
C5 C6 H14 110.622 C6 C5 H10 112.292
C6 C5 H11 112.292 H7 C1 H8 110.075
H7 C1 H9 110.075 H8 C1 H9 107.655
H10 C5 H11 107.698 H12 C6 H13 108.518
H12 C6 H14 108.518 H13 C6 H14 108.543
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability