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: HF/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/SDD
 hartrees
Energy at 0K-305.783527
Energy at 298.15K 
HF Energy-305.783527
Nuclear repulsion energy242.141110
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 HF/SDD
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' 3362 3027 17.57 59.74 0.68 0.81
2 A' 3299 2970 60.56 55.14 0.69 0.82
3 A' 3269 2943 16.35 120.99 0.11 0.19
4 A' 3234 2912 7.96 148.19 0.01 0.02
5 A' 3212 2892 34.69 134.55 0.02 0.04
6 A' 1859 1674 331.45 4.58 0.57 0.72
7 A' 1671 1505 8.26 4.87 0.67 0.80
8 A' 1650 1485 6.36 17.30 0.73 0.84
9 A' 1622 1461 29.06 14.12 0.74 0.85
10 A' 1580 1423 6.06 1.72 0.27 0.42
11 A' 1571 1415 54.39 1.50 0.72 0.84
12 A' 1546 1392 0.90 2.71 0.65 0.79
13 A' 1403 1263 525.75 1.59 0.64 0.78
14 A' 1244 1120 14.49 12.04 0.19 0.32
15 A' 1182 1064 135.62 3.86 0.74 0.85
16 A' 1117 1006 10.59 5.97 0.42 0.59
17 A' 1014 913 18.83 2.73 0.66 0.80
18 A' 904 814 17.90 14.74 0.26 0.41
19 A' 673 606 15.69 9.70 0.33 0.50
20 A' 447 403 1.06 0.46 0.63 0.77
21 A' 381 343 13.38 3.02 0.35 0.52
22 A' 191 172 8.60 0.38 0.69 0.81
23 A" 3336 3004 73.10 7.94 0.75 0.86
24 A" 3319 2989 14.34 56.09 0.75 0.86
25 A" 3305 2976 10.53 85.06 0.75 0.86
26 A" 1634 1472 9.30 14.69 0.75 0.86
27 A" 1629 1466 13.74 14.72 0.75 0.86
28 A" 1416 1275 0.77 16.04 0.75 0.86
29 A" 1297 1168 9.40 1.80 0.75 0.86
30 A" 1203 1083 14.12 2.60 0.75 0.86
31 A" 896 807 0.48 0.18 0.75 0.86
32 A" 651 586 18.33 2.33 0.75 0.86
33 A" 266 240 2.32 0.02 0.75 0.86
34 A" 155 139 10.30 0.01 0.75 0.86
35 A" 100 90 0.13 0.14 0.75 0.86
36 A" 64 57 1.20 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 27850.1 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 25076.2 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 HF/SDD
ABC
0.27790 0.06830 0.05653

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.316 -0.061 0.000
C2 -0.904 -0.573 0.000
O3 0.000 0.433 0.000
O4 -0.576 -1.746 0.000
C5 1.430 0.135 0.000
C6 2.160 1.466 0.000
H7 -3.005 -0.889 0.000
H8 -2.478 0.556 0.874
H9 -2.478 0.556 -0.874
H10 1.655 -0.456 0.876
H11 1.655 -0.456 -0.876
H12 3.232 1.299 0.000
H13 1.901 2.044 -0.878
H14 1.901 2.044 0.878

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50112.36762.42223.75074.72891.07791.08191.08194.08554.08555.71134.79384.7938
C21.50111.35231.21882.43923.68062.12492.12442.12442.70802.70804.53953.93543.9354
O32.36761.35232.25401.46092.39453.28342.63002.63002.07312.07313.34562.64202.6420
O42.42221.21882.25402.74994.21962.57653.11173.11172.72242.72244.87534.61214.6121
C53.75072.43921.46092.74991.51844.55224.02634.02631.08041.08042.14482.15342.1534
C64.72893.68062.39454.21961.51845.67724.80614.80612.17162.17161.08451.08241.0824
H71.07792.12493.28342.57654.55225.67721.76961.76964.76234.76236.60975.78345.7834
H81.08192.12442.63003.11174.02634.80611.76961.74714.25514.60085.82314.94504.6245
H91.08192.12442.63003.11174.02634.80611.76961.74714.60084.25515.82314.62454.9450
H104.08552.70802.07312.72241.08042.17164.76234.25514.60081.75252.51603.06352.5116
H114.08552.70802.07312.72241.08042.17164.76234.60084.25511.75252.51602.51163.0635
H125.71134.53953.34564.87532.14481.08456.60975.82315.82312.51602.51601.75951.7595
H134.79383.93542.64204.61212.15341.08245.78344.94504.62453.06352.51161.75951.7557
H144.79383.93542.64204.61212.15341.08245.78344.62454.94502.51163.06351.75951.7557

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 112.036 C1 C2 O4 125.565
C2 C1 H7 109.868 C2 C1 H8 109.594
C2 C1 H9 109.594 C2 O3 C5 120.190
O3 C2 O4 122.399 O3 C5 C6 106.958
O3 C5 H10 108.399 O3 C5 H11 108.399
C5 C6 H12 109.856 C5 C6 H13 110.673
C5 C6 H14 110.673 C6 C5 H10 112.271
C6 C5 H11 112.271 H7 C1 H8 110.031
H7 C1 H9 110.031 H8 C1 H9 107.690
H10 C5 H11 108.403 H12 C6 H13 108.588
H12 C6 H14 108.588 H13 C6 H14 108.401
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.648      
2 C 0.598      
3 O -0.516      
4 O -0.432      
5 C -0.034      
6 C -0.558      
7 H 0.217      
8 H 0.215      
9 H 0.215      
10 H 0.193      
11 H 0.193      
12 H 0.173      
13 H 0.192      
14 H 0.192      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.298 2.389 0.000 2.408
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.088 -0.827 0.000
y -0.827 -45.828 0.000
z 0.000 0.000 -35.761
Traceless
 xyz
x 11.707 -0.827 0.000
y -0.827 -13.403 0.000
z 0.000 0.000 1.697
Polar
3z2-r23.394
x2-y216.740
xy-0.827
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.312 0.371 0.000
y 0.371 7.010 0.000
z 0.000 0.000 5.226


<r2> (average value of r2) Å2
<r2> 204.862
(<r2>)1/2 14.313