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All results from a given calculation for C5H8O (Cyclopentanone)

using model chemistry: HF/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at HF/STO-3G
 hartrees
Energy at 0K-265.547641
Energy at 298.15K-265.557417
HF Energy-265.547641
Nuclear repulsion energy233.750646
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/STO-3G
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 3736 3051 0.33      
2 A 3725 3041 0.03      
3 A 3621 2957 1.54      
4 A 3607 2945 1.23      
5 A 2143 1750 39.30      
6 A 1838 1501 0.04      
7 A 1798 1468 0.00      
8 A 1650 1347 3.55      
9 A 1597 1304 1.80      
10 A 1464 1196 0.99      
11 A 1429 1167 0.09      
12 A 1247 1018 0.38      
13 A 1182 965 0.01      
14 A 1073 876 0.00      
15 A 959 783 0.08      
16 A 868 709 0.24      
17 A 650 531 1.23      
18 A 233 190 0.00      
19 B 3742 3055 3.10      
20 B 3726 3042 0.03      
21 B 3617 2953 2.18      
22 B 3606 2944 0.99      
23 B 1823 1488 0.37      
24 B 1798 1468 3.55      
25 B 1636 1336 5.50      
26 B 1577 1288 3.43      
27 B 1495 1221 0.13      
28 B 1378 1125 30.80      
29 B 1370 1118 22.71      
30 B 1159 946 5.01      
31 B 1107 904 0.71      
32 B 988 807 2.75      
33 B 670 547 2.21      
34 B 517 422 7.60      
35 B 506 413 4.97      
36 B 95 77 2.27      

Unscaled Zero Point Vibrational Energy (zpe) 31813.7 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 25975.9 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/STO-3G
ABC
0.21678 0.11016 0.07862

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/STO-3G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 2.152
C2 0.000 0.000 0.937
C3 0.000 1.259 0.030
C4 0.000 -1.259 0.030
C5 0.286 0.719 -1.386
C6 -0.286 -0.719 -1.386
H7 -0.981 1.729 0.076
H8 0.981 -1.729 0.076
H9 0.734 1.988 0.365
H10 -0.734 -1.988 0.365
H11 -0.162 1.336 -2.161
H12 0.162 -1.336 -2.161
H13 1.359 0.688 -1.560
H14 -1.359 -0.688 -1.560

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
O11.21512.46702.46703.62183.62182.87432.87432.77212.77214.51804.51804.01254.0125
C21.21511.55141.55142.44862.44862.16652.16652.19482.19483.37763.37762.92492.9249
C32.46701.55142.51821.54272.44991.08893.14561.08713.34552.19883.40052.16852.8579
C42.46701.55142.51822.44991.54273.14561.08893.34551.08713.40052.19882.85792.1685
C53.62182.44861.54272.44991.54772.18242.93562.20813.38131.08672.19991.08772.1713
C63.62182.44862.44991.54271.54772.93562.18243.38132.20812.19991.08672.17131.0877
H72.87432.16651.08893.14562.18242.93563.97641.75853.73632.41463.96333.03912.9435
H82.87432.16653.14561.08892.93562.18243.97643.73631.75853.96332.41462.94353.0391
H92.77212.19481.08713.34552.20813.38131.75853.73634.23792.75814.21342.40503.9046
H102.77212.19483.34551.08713.38132.20813.73631.75854.23794.21342.75813.90462.4050
H114.51803.37762.19883.40051.08672.19992.41463.96332.75814.21342.69161.75882.4269
H124.51803.37763.40052.19882.19991.08673.96332.41464.21342.75812.69162.42691.7588
H134.01252.92492.16852.85791.08772.17133.03912.94352.40503.90461.75882.42693.0461
H144.01252.92492.85792.16852.17131.08772.94353.03913.90462.40502.42691.75883.0461

picture of Cyclopentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 125.751 O1 C2 C4 125.751
C2 C3 C5 104.628 C2 C3 H7 109.022
C2 C3 H9 111.363 C2 C4 C6 104.628
C2 C4 H8 109.022 C2 C4 H10 111.363
C3 C2 C4 108.498 C3 C5 C6 104.889
C3 C5 H11 112.325 C3 C5 H13 109.848
C4 C6 C5 104.889 C4 C6 H12 112.325
C4 C6 H14 109.848 C5 C3 H7 110.882
C5 C3 H9 113.069 C5 C6 H12 112.058
C5 C6 H14 109.721 C6 C4 H8 110.882
C6 C4 H10 113.069 C6 C5 H11 112.058
C6 C5 H13 109.721 H7 C3 H9 107.835
H8 C4 H10 107.835 H11 C5 H13 107.974
H12 C6 H14 107.974
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.230      
2 C 0.205      
3 C -0.134      
4 C -0.134      
5 C -0.103      
6 C -0.103      
7 H 0.067      
8 H 0.067      
9 H 0.068      
10 H 0.068      
11 H 0.059      
12 H 0.059      
13 H 0.056      
14 H 0.056      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.973 1.973
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.158 -0.128 0.000
y -0.128 -33.825 0.000
z 0.000 0.000 -40.336
Traceless
 xyz
x 3.923 -0.128 0.000
y -0.128 2.921 0.000
z 0.000 0.000 -6.844
Polar
3z2-r2-13.689
x2-y20.668
xy-0.128
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.292 0.010 0.000
y 0.010 3.994 0.000
z 0.000 0.000 4.792


<r2> (average value of r2) Å2
<r2> 153.570
(<r2>)1/2 12.392