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 C5H8O (Cyclopentanone)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-270.475608
Energy at 298.15K-270.485210
HF Energy-270.475608
Nuclear repulsion energy235.240509
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 B3PW91/6-31G*
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 3136 3000 6.14      
2 A 3124 2989 21.07      
3 A 3063 2930 23.71      
4 A 3054 2922 5.31      
5 A 1862 1781 218.09      
6 A 1533 1467 1.42      
7 A 1473 1409 0.02      
8 A 1359 1300 0.32      
9 A 1322 1264 1.55      
10 A 1232 1179 0.00      
11 A 1190 1138 0.25      
12 A 1054 1008 0.78      
13 A 972 930 0.28      
14 A 914 875 0.42      
15 A 821 785 0.79      
16 A 718 687 1.06      
17 A 566 542 5.35      
18 A 231 221 0.08      
19 B 3137 3001 25.70      
20 B 3129 2993 28.33      
21 B 3068 2935 37.91      
22 B 3054 2922 6.29      
23 B 1518 1453 5.30      
24 B 1473 1409 19.76      
25 B 1357 1298 3.30      
26 B 1311 1255 7.73      
27 B 1267 1212 2.56      
28 B 1178 1127 11.75      
29 B 1169 1119 70.70      
30 B 986 944 10.75      
31 B 934 893 1.01      
32 B 853 816 11.11      
33 B 586 561 2.83      
34 B 472 452 4.57      
35 B 451 432 3.51      
36 B 105 100 5.17      

Unscaled Zero Point Vibrational Energy (zpe) 26835.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 25673.4 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 B3PW91/6-31G*
ABC
0.22110 0.11154 0.08010

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 2.134
C2 0.000 0.000 0.924
C3 0.000 1.240 0.028
C4 0.000 -1.240 0.028
C5 0.300 0.710 -1.377
C6 -0.300 -0.710 -1.377
H7 -1.008 1.678 0.080
H8 1.008 -1.678 0.080
H9 0.695 1.996 0.406
H10 -0.695 -1.996 0.406
H11 -0.107 1.341 -2.173
H12 0.107 -1.341 -2.173
H13 1.386 0.652 -1.530
H14 -1.386 -0.652 -1.530

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
O11.20962.44312.44313.59413.59412.83682.83682.72942.72944.51204.51203.97113.9711
C21.20961.52941.52942.42662.42662.13142.13142.17572.17573.37673.37672.89292.8929
C32.44311.52942.47951.53162.42201.09993.08721.09423.33072.20663.39382.16682.8160
C42.44311.52942.47952.42201.53163.08721.09993.33071.09423.39382.20662.81602.1668
C53.59412.42661.53162.42201.54152.18402.88532.23353.38971.09442.20831.09792.1729
C63.59412.42662.42201.53161.54152.88532.18403.38972.23352.20831.09442.17291.0979
H72.83682.13141.09993.08722.18402.88533.91441.76243.70132.45003.92833.06152.8576
H82.83682.13143.08721.09992.88532.18403.91443.70131.76243.92832.45002.85763.0615
H92.72942.17571.09423.33072.23353.38971.76243.70134.22652.77954.25812.45593.8848
H102.72942.17573.33071.09423.38972.23353.70131.76244.22654.25812.77953.88482.4559
H114.51203.37672.20663.39381.09442.20832.45003.92832.77954.25812.68991.76502.4539
H124.51203.37673.39382.20662.20831.09443.92832.45004.25812.77952.68992.45391.7650
H133.97112.89292.16682.81601.09792.17293.06152.85762.45593.88481.76502.45393.0633
H143.97112.89292.81602.16682.17291.09792.85763.06153.88482.45592.45391.76503.0633

picture of Cyclopentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 125.843 O1 C2 C4 125.843
C2 C3 C5 104.883 C2 C3 H7 107.185
C2 C3 H9 110.965 C2 C4 C6 104.883
C2 C4 H8 107.185 C2 C4 H10 110.965
C3 C2 C4 108.313 C3 C5 C6 104.022
C3 C5 H11 113.291 C3 C5 H13 109.883
C4 C6 C5 104.022 C4 C6 H12 113.291
C4 C6 H14 109.883 C5 C3 H7 111.127
C5 C3 H9 115.550 C5 C6 H12 112.708
C5 C6 H14 109.683 C6 C4 H8 111.127
C6 C4 H10 115.550 C6 C5 H11 112.708
C6 C5 H13 109.683 H7 C3 H9 106.887
H8 C4 H10 106.887 H11 C5 H13 107.236
H12 C6 H14 107.236
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.450      
2 C 0.454      
3 C -0.410      
4 C -0.410      
5 C -0.339      
6 C -0.339      
7 H 0.199      
8 H 0.199      
9 H 0.200      
10 H 0.200      
11 H 0.174      
12 H 0.174      
13 H 0.173      
14 H 0.173      


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 -2.924 2.924
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.534 -0.232 0.000
y -0.232 -34.372 0.000
z 0.000 0.000 -43.731
Traceless
 xyz
x 4.518 -0.232 0.000
y -0.232 4.761 0.000
z 0.000 0.000 -9.279
Polar
3z2-r2-18.557
x2-y2-0.162
xy-0.232
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.388 0.038 0.000
y 0.038 7.795 0.000
z 0.000 0.000 8.475


<r2> (average value of r2) Å2
<r2> 152.698
(<r2>)1/2 12.357