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

using model chemistry: CCD/cc-pVDZ

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

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CCD/cc-pVDZ
 hartrees
Energy at 0K-192.870579
Energy at 298.15K-192.875457
HF Energy-192.207957
Nuclear repulsion energy147.850318
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/cc-pVDZ
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 3292 3150 0.42      
2 A1 3280 3138 7.33      
3 A1 3252 3111 1.14      
4 A1 1607 1537 0.06      
5 A1 1504 1439 2.34      
6 A1 1166 1116 0.74      
7 A1 1094 1046 9.21      
8 A1 1048 1002 7.65      
9 A1 847 811 0.31      
10 A2 898 859 0.00      
11 A2 847 811 0.00      
12 A2 529 506 0.00      
13 B1 918 878 6.55      
14 B1 747 715 7.96      
15 B1 697 666 84.89      
16 B1 510 488 8.14      
17 B2 5385 5152 46140.75      
18 B2 3258 3117 75.52      
19 B2 3250 3109 23.50      
20 B2 1389 1329 87.96      
21 B2 1301 1244 1.94      
22 B2 1159 1109 17.62      
23 B2 957 916 0.25      
24 B2 856 819 6.79      

Unscaled Zero Point Vibrational Energy (zpe) 19895.0 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 19033.6 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/cc-pVDZ
ABC
0.30655 0.28058 0.14650

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.228
C2 0.000 1.128 0.397
C3 0.000 0.685 -1.012
C4 0.000 -0.685 -1.012
C5 0.000 -1.128 0.397
H6 0.000 0.000 2.319
H7 0.000 2.172 0.725
H8 0.000 1.347 -1.880
H9 0.000 -1.347 -1.880
H10 0.000 -2.172 0.725

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10
C11.40172.34282.34281.40171.09072.22933.38823.38822.2293
C21.40171.47722.29662.25692.22891.09382.28793.36393.3166
C32.34281.47721.37012.29663.40092.28681.09212.21013.3437
C42.34282.29661.37011.47723.40093.34372.21011.09212.2868
C51.40172.25692.29661.47722.22893.31663.36392.28791.0938
H61.09072.22893.40093.40092.22892.69384.41044.41042.6938
H72.22931.09382.28683.34373.31662.69382.73334.37894.3436
H83.38822.28791.09212.21013.36394.41042.73332.69454.3789
H93.38823.36392.21011.09212.28794.41044.37892.69452.7333
H102.22933.31663.34372.28681.09382.69384.34364.37892.7333

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 108.913 C1 C2 H7 126.145
C1 C5 C4 108.913 C1 C5 H10 126.145
C2 C1 C5 107.237 C2 C1 H6 126.382
C2 C3 C4 107.468 C2 C3 H8 125.207
C3 C2 H7 124.942 C3 C4 C5 107.468
C3 C4 H9 127.325 C4 C3 H8 127.325
C4 C5 H10 124.942 C5 C1 H6 126.382
C5 C4 H9 125.207
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability