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All results from a given calculation for C5H8O (Cyclopentanone)

using model chemistry: PBEPBE/3-21G

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/3-21G
 hartrees
Energy at 0K-268.751765
Energy at 298.15K-268.761269
HF Energy-268.751765
Nuclear repulsion energy232.408430
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/3-21G
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 3068 3040 6.37      
2 A 3061 3033 13.18      
3 A 2997 2970 17.40      
4 A 2978 2951 5.94      
5 A 1719 1704 132.14      
6 A 1506 1492 2.68      
7 A 1450 1437 0.09      
8 A 1326 1314 0.07      
9 A 1285 1273 7.63      
10 A 1219 1208 0.19      
11 A 1145 1134 0.00      
12 A 1026 1017 1.11      
13 A 970 961 0.65      
14 A 885 877 0.80      
15 A 786 779 0.12      
16 A 687 681 1.48      
17 A 545 540 5.14      
18 A 235 233 0.10      
19 B 3072 3044 22.32      
20 B 3063 3035 15.00      
21 B 3003 2976 27.44      
22 B 2977 2950 3.76      
23 B 1498 1484 8.42      
24 B 1450 1436 26.74      
25 B 1323 1311 0.26      
26 B 1293 1281 1.38      
27 B 1239 1227 0.26      
28 B 1169 1158 0.14      
29 B 1081 1072 83.80      
30 B 956 948 21.24      
31 B 920 912 0.75      
32 B 828 820 23.49      
33 B 573 568 2.64      
34 B 461 457 0.57      
35 B 433 429 4.47      
36 B 100 99 4.01      

Unscaled Zero Point Vibrational Energy (zpe) 26161.9 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 25923.8 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/3-21G
ABC
0.21729 0.10809 0.07816

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 2.175
C2 0.000 0.000 0.937
C3 0.000 1.250 0.020
C4 0.000 -1.250 0.020
C5 0.322 0.711 -1.393
C6 -0.322 -0.711 -1.393
H7 -1.025 1.674 0.045
H8 1.025 -1.674 0.045
H9 0.695 2.016 0.402
H10 -0.695 -2.016 0.402
H11 -0.072 1.352 -2.198
H12 0.072 -1.352 -2.198
H13 1.416 0.617 -1.518
H14 -1.416 -0.617 -1.518

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
O11.23762.49162.49163.65283.65282.89662.89662.77312.77314.57804.57804.00284.0028
C21.23761.55101.55102.45802.45802.15632.15632.19832.19833.41553.41552.90072.9007
C32.49161.55102.50091.54652.43891.10933.09901.10183.36092.22163.42032.18442.8030
C42.49161.55102.50092.43891.54653.09901.10933.36091.10183.42032.22162.80302.1844
C53.65282.45801.54652.43891.56102.19302.87272.25023.41921.10162.22881.10572.1908
C63.65282.45802.43891.54651.56102.87272.19303.41922.25022.22881.10162.19081.1057
H72.89662.15631.10933.09902.19302.87273.92581.78913.72162.45833.92333.08532.8005
H82.89662.15633.09901.10932.87272.19303.92583.72161.78913.92332.45832.80053.0853
H92.77312.19831.10183.36092.25023.41921.78913.72164.26402.79054.30002.48233.8821
H102.77312.19833.36091.10183.41922.25023.72161.78914.26404.30002.79053.88212.4823
H114.57803.41552.22163.42031.10162.22882.45833.92332.79054.30002.70831.79402.4795
H124.57803.41553.42032.22162.22881.10163.92332.45834.30002.79052.70832.47951.7940
H134.00282.90072.18442.80301.10572.19083.08532.80052.48233.88211.79402.47953.0897
H144.00282.90072.80302.18442.19081.10572.80053.08533.88212.48232.47951.79403.0897

picture of Cyclopentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 126.271 O1 C2 C4 126.271
C2 C3 C5 105.040 C2 C3 H7 107.132
C2 C3 H9 110.788 C2 C4 C6 105.040
C2 C4 H8 107.132 C2 C4 H10 110.788
C3 C2 C4 107.457 C3 C5 C6 103.414
C3 C5 H11 112.978 C3 C5 H13 109.780
C4 C6 C5 103.414 C4 C6 H12 112.978
C4 C6 H14 109.780 C5 C3 H7 110.241
C5 C3 H9 115.325 C5 C6 H12 112.521
C5 C6 H14 109.288 C6 C4 H8 110.241
C6 C4 H10 115.325 C6 C5 H11 112.521
C6 C5 H13 109.288 H7 C3 H9 108.028
H8 C4 H10 108.028 H11 C5 H13 108.732
H12 C6 H14 108.732
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.420      
2 C 0.421      
3 C -0.486      
4 C -0.486      
5 C -0.418      
6 C -0.418      
7 H 0.242      
8 H 0.242      
9 H 0.236      
10 H 0.236      
11 H 0.212      
12 H 0.212      
13 H 0.214      
14 H 0.214      


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 -2.595 2.595
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.183 -0.263 0.000
y -0.263 -34.878 0.000
z 0.000 0.000 -43.434
Traceless
 xyz
x 3.973 -0.263 0.000
y -0.263 4.430 0.000
z 0.000 0.000 -8.404
Polar
3z2-r2-16.807
x2-y2-0.305
xy-0.263
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.096 0.030 0.000
y 0.030 7.572 0.000
z 0.000 0.000 8.231


<r2> (average value of r2) Å2
<r2> 155.958
(<r2>)1/2 12.488