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

using model chemistry: CCSD/TZVP

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 CCSD/TZVP
Rotational Constants (cm-1) from geometry optimized at CCSD/TZVP
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/TZVP
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CCSD/TZVP
 hartrees
Energy at 0K-192.947895
Energy at 298.15K-192.951956
HF Energy-192.251176
Nuclear repulsion energy148.751405
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 CCSD/TZVP
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 3290 3140 0.00      
2 A1 3281 3132 10.08      
3 A1 3252 3104 0.83      
4 A1 1604 1531 0.13      
5 A1 1480 1413 1.20      
6 A1 1158 1106 0.00      
7 A1 1100 1050 8.86      
8 A1 1046 998 6.38      
9 A1 850 812 0.23      
10 A2 766 731 0.00      
11 A2 595 568 0.00      
12 A2 293 279 0.00      
13 B1 703 671 29.63      
14 B1 629 601 91.25      
15 B1 524 500 12.71      
16 B1 281 268 3.09      
17 B2 3271 3122 5.36      
18 B2 3254 3106 0.10      
19 B2 2643 2523 2360.06      
20 B2 1403 1339 68.74      
21 B2 1321 1261 0.00      
22 B2 1168 1115 16.14      
23 B2 969 925 0.95      
24 B2 864 825 7.64      

Unscaled Zero Point Vibrational Energy (zpe) 17873.3 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 17058.3 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 CCSD/TZVP
ABC
0.31016 0.28362 0.14815

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.223
C2 0.000 1.125 0.395
C3 0.000 0.677 -1.007
C4 0.000 -0.677 -1.007
C5 0.000 -1.125 0.395
H6 0.000 0.000 2.301
H7 0.000 2.157 0.717
H8 0.000 1.331 -1.866
H9 0.000 -1.331 -1.866
H10 0.000 -2.157 0.717

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10
C11.39682.33082.33081.39681.07832.21543.36333.36332.2154
C21.39681.47242.28402.25052.21321.08062.27043.33883.2978
C32.33081.47241.35482.28403.37712.27211.07922.18463.3176
C42.33082.28401.35481.47243.37713.31762.18461.07922.2721
C51.39682.25052.28401.47242.21323.29783.33882.27041.0806
H61.07832.21323.37713.37712.21322.67604.37444.37442.6760
H72.21541.08062.27213.31763.29782.67602.71154.34044.3137
H83.36332.27041.07922.18463.33884.37442.71152.66294.3404
H93.36333.33882.18461.07922.27044.37444.34042.66292.7115
H102.21543.29783.31762.27211.08062.67604.31374.34042.7115

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 108.624 C1 C2 H7 126.345
C1 C5 C4 108.624 C1 C5 H10 126.345
C2 C1 C5 107.337 C2 C1 H6 126.332
C2 C3 C4 107.708 C2 C3 H8 124.988
C3 C2 H7 125.031 C3 C4 C5 107.708
C3 C4 H9 127.305 C4 C3 H8 127.305
C4 C5 H10 125.031 C5 C1 H6 126.332
C5 C4 H9 124.988
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability