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: PBEPBE/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 PBEPBE/6-31G
 hartrees
Energy at 0K-270.159122
Energy at 298.15K-270.168663
HF Energy-270.159122
Nuclear repulsion energy232.674970
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 PBEPBE/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 3065 3023 6.50      
2 A 3057 3015 20.42      
3 A 2990 2949 23.39      
4 A 2977 2936 7.34      
5 A 1697 1674 162.82      
6 A 1503 1482 2.35      
7 A 1448 1428 0.06      
8 A 1322 1304 0.06      
9 A 1288 1271 3.02      
10 A 1208 1191 0.03      
11 A 1154 1138 0.16      
12 A 1045 1030 1.05      
13 A 968 955 0.47      
14 A 894 881 0.61      
15 A 807 795 0.35      
16 A 712 702 1.25      
17 A 565 558 5.74      
18 A 219 216 0.08      
19 B 3069 3026 32.89      
20 B 3060 3018 21.13      
21 B 2995 2954 37.29      
22 B 2976 2935 6.04      
23 B 1495 1475 6.76      
24 B 1447 1427 25.13      
25 B 1330 1312 2.77      
26 B 1280 1262 2.31      
27 B 1243 1226 0.08      
28 B 1158 1142 0.29      
29 B 1137 1121 94.37      
30 B 973 959 16.76      
31 B 924 912 1.03      
32 B 839 828 13.78      
33 B 585 577 2.91      
34 B 459 453 2.38      
35 B 442 435 4.45      
36 B 107 105 5.90      

Unscaled Zero Point Vibrational Energy (zpe) 26218.2 cm-1
Scaled (by 0.9862) Zero Point Vibrational Energy (zpe) 25856.4 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 PBEPBE/6-31G
ABC
0.21748 0.10881 0.07821

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 2.169
C2 0.000 0.000 0.923
C3 0.000 1.249 0.028
C4 0.000 -1.249 0.028
C5 0.293 0.721 -1.393
C6 -0.293 -0.721 -1.393
H7 -1.010 1.705 0.087
H8 1.010 -1.705 0.087
H9 0.711 2.002 0.405
H10 -0.711 -2.002 0.405
H11 -0.139 1.352 -2.187
H12 0.139 -1.352 -2.187
H13 1.386 0.680 -1.561
H14 -1.386 -0.680 -1.561

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
O11.24582.47832.47833.64623.64622.87422.87422.76122.76124.56324.56324.03714.0371
C21.24581.53641.53642.44372.44372.15062.15062.18692.18693.39423.39422.92512.9251
C32.47831.53642.49791.54452.44701.10923.12191.10243.34932.22243.41922.18452.8579
C42.47831.53642.49792.44701.54453.12191.10923.34931.10243.41922.22242.85792.1845
C53.64622.44371.54452.44701.55682.20322.93042.24753.41471.10212.22491.10632.1931
C63.64622.44372.44701.54451.55682.93042.20323.41472.24752.22491.10212.19311.1063
H72.87422.15061.10923.12192.20322.93043.96231.77513.73252.46043.97863.08292.9228
H82.87422.15063.12191.10922.93042.20323.96233.73251.77513.97862.46042.92283.0829
H92.76122.18691.10243.34932.24753.41471.77513.73254.24952.80504.27762.46443.9317
H102.76122.18693.34931.10243.41472.24753.73251.77514.24954.27762.80503.93172.4644
H114.56323.39422.22243.41921.10212.22492.46043.97862.80504.27762.71731.77972.4643
H124.56323.39423.41922.22242.22491.10213.97862.46044.27762.80502.71732.46431.7797
H134.03712.92512.18452.85791.10632.19313.08292.92282.46443.93171.77972.46433.0871
H144.03712.92512.85792.18452.19311.10632.92283.08293.93172.46442.46431.77973.0871

picture of Cyclopentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 125.619 O1 C2 C4 125.619
C2 C3 C5 104.966 C2 C3 H7 107.665
C2 C3 H9 110.869 C2 C4 C6 104.966
C2 C4 H8 107.665 C2 C4 H10 110.869
C3 C2 C4 108.761 C3 C5 C6 104.187
C3 C5 H11 113.161 C3 C5 H13 109.895
C4 C6 C5 104.187 C4 C6 H12 113.161
C4 C6 H14 109.895 C5 C3 H7 111.190
C5 C3 H9 115.208 C5 C6 H12 112.474
C5 C6 H14 109.712 C6 C4 H8 111.190
C6 C4 H10 115.208 C6 C5 H11 112.474
C6 C5 H13 109.712 H7 C3 H9 106.765
H8 C4 H10 106.765 H11 C5 H13 107.392
H12 C6 H14 107.392
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.388      
2 C 0.323      
3 C -0.349      
4 C -0.349      
5 C -0.304      
6 C -0.304      
7 H 0.189      
8 H 0.189      
9 H 0.184      
10 H 0.184      
11 H 0.154      
12 H 0.154      
13 H 0.158      
14 H 0.158      


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 -3.080 3.080
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.007 -0.245 0.000
y -0.245 -34.529 0.000
z 0.000 0.000 -44.780
Traceless
 xyz
x 4.647 -0.245 0.000
y -0.245 5.364 0.000
z 0.000 0.000 -10.012
Polar
3z2-r2-20.023
x2-y2-0.478
xy-0.245
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.408 0.022 0.000
y 0.022 7.901 0.000
z 0.000 0.000 8.757


<r2> (average value of r2) Å2
<r2> 155.962
(<r2>)1/2 12.488