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

using model chemistry: CCD/3-21G*

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/3-21G*
Rotational Constants (cm-1) from geometry optimized at CCD/3-21G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-191.559733
Energy at 298.15K-191.564539
HF Energy-191.114608
Nuclear repulsion energy147.201618
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/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 A1 3254 3113 0.17      
2 A1 3240 3099 9.73      
3 A1 3214 3074 0.99      
4 A1 1562 1494 0.13      
5 A1 1439 1376 0.31      
6 A1 1171 1120 0.00      
7 A1 1102 1055 11.11      
8 A1 995 951 4.16      
9 A1 887 848 0.15      
10 A2 869 831 0.00      
11 A2 787 752 0.00      
12 A2 530 507 0.00      
13 B1 885 847 11.47      
14 B1 716 685 0.52      
15 B1 674 645 120.72      
16 B1 517 494 10.11      
17 B2 3703 3542 9086.21      
18 B2 3216 3076 138.10      
19 B2 3210 3070 109.88      
20 B2 1392 1331 81.82      
21 B2 1340 1281 1.11      
22 B2 1196 1144 6.54      
23 B2 937 896 0.13      
24 B2 859 822 4.08      

Unscaled Zero Point Vibrational Energy (zpe) 18845.7 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 18025.9 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/3-21G*
ABC
0.30389 0.27698 0.14490

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.231
C2 0.000 1.138 0.406
C3 0.000 0.684 -1.023
C4 0.000 -0.684 -1.023
C5 0.000 -1.138 0.406
H6 0.000 0.000 2.314
H7 0.000 2.173 0.731
H8 0.000 1.345 -1.882
H9 0.000 -1.345 -1.882
H10 0.000 -2.173 0.731

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10
C11.40502.35512.35511.40501.08322.23003.39113.39112.2300
C21.40501.49952.31572.27562.22101.08542.29823.37683.3271
C32.35511.49951.36842.31573.40612.30111.08412.20373.3531
C42.35512.31571.36841.49953.40613.35312.20371.08412.3011
C51.40502.27562.31571.49952.22103.32713.37682.29821.0854
H61.08322.22103.40613.40612.22102.68844.40644.40642.6884
H72.23001.08542.30113.35313.32712.68842.74204.38304.3467
H83.39112.29821.08412.20373.37684.40642.74202.68984.3830
H93.39113.37682.20371.08412.29824.40644.38302.68982.7420
H102.23003.32713.35312.30111.08542.68844.34674.38302.7420

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 108.312 C1 C2 H7 126.657
C1 C5 C4 108.312 C1 C5 H10 126.657
C2 C1 C5 108.162 C2 C1 H6 125.919
C2 C3 C4 107.607 C2 C3 H8 124.846
C3 C2 H7 125.032 C3 C4 C5 107.607
C3 C4 H9 127.546 C4 C3 H8 127.546
C4 C5 H10 125.032 C5 C1 H6 125.919
C5 C4 H9 124.846
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability