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All results from a given calculation for C5H5 (cyclopentadienyl radical)

using model chemistry: CCD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C2V 2B1

Conformer 1 (D5H)

Jump to S1C2
Vibrational Frequencies calculated at CCD/6-31G*
Rotational Constants (cm-1) from geometry optimized at CCD/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CCD/6-31G*
 hartrees
Energy at 0K-192.825608
Energy at 298.15K-192.830433
HF Energy-192.191631
Nuclear repulsion energy148.837602
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 CCD/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 A1 3289 3113 0.84      
2 A1 3278 3102 10.05      
3 A1 3251 3077 1.35      
4 A1 1631 1544 0.01      
5 A1 1523 1441 1.59      
6 A1 1185 1121 0.56      
7 A1 1125 1064 10.06      
8 A1 1071 1013 6.69      
9 A1 863 817 0.28      
10 A2 860 814 0.00      
11 A2 822 778 0.00      
12 A2 525 497 0.00      
13 B1 876 829 7.90      
14 B1 730 691 12.08      
15 B1 689 652 86.88      
16 B1 505 478 9.69      
17 B2 5689 5385 57141.42      
18 B2 3257 3083 90.31      
19 B2 3249 3076 20.65      
20 B2 1416 1340 77.65      
21 B2 1332 1261 0.03      
22 B2 1191 1127 11.75      
23 B2 979 927 1.63      
24 B2 874 828 8.14      

Unscaled Zero Point Vibrational Energy (zpe) 20103.4 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 19027.8 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 CCD/6-31G*
ABC
0.31077 0.28421 0.14845

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.220
C2 0.000 1.121 0.395
C3 0.000 0.680 -1.006
C4 0.000 -0.680 -1.006
C5 0.000 -1.121 0.395
H6 0.000 0.000 2.304
H7 0.000 2.157 0.720
H8 0.000 1.339 -1.867
H9 0.000 -1.339 -1.867
H10 0.000 -2.157 0.720

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10
C11.39212.32772.32771.39211.08352.21483.36563.36562.2148
C21.39211.46832.28132.24172.21391.08632.27263.34203.2944
C32.32771.46831.35992.28133.37892.27161.08482.19533.3209
C42.32772.28131.35991.46833.37893.32092.19531.08482.2716
C51.39212.24172.28131.46832.21393.29443.34202.27261.0863
H61.08352.21393.37893.37892.21392.67664.38104.38102.6766
H72.21481.08632.27163.32093.29442.67662.71334.34964.3149
H83.36562.27261.08482.19533.34204.38102.71332.67834.3496
H93.36563.34202.19531.08482.27264.38104.34962.67832.7133
H102.21483.29443.32092.27161.08632.67664.31494.34962.7133

picture of cyclopentadienyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 108.902 C1 C2 H7 126.220
C1 C5 C4 108.902 C1 C5 H10 126.220
C2 C1 C5 107.248 C2 C1 H6 126.376
C2 C3 C4 107.474 C2 C3 H8 125.104
C3 C2 H7 124.878 C3 C4 C5 107.474
C3 C4 H9 127.422 C4 C3 H8 127.422
C4 C5 H10 124.878 C5 C1 H6 126.376
C5 C4 H9 125.104
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability