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

using model chemistry: MP2/LANL2DZ

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 MP2/LANL2DZ
Rotational Constants (cm-1) from geometry optimized at MP2/LANL2DZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2/LANL2DZ
 hartrees
Energy at 0K-192.517293
Energy at 298.15K-192.521997
HF Energy-192.135143
Nuclear repulsion energy146.184507
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 MP2/LANL2DZ
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 3282 3161 1.66      
2 A1 3260 3139 15.23      
3 A1 3232 3113 2.63      
4 A1 1524 1468 0.80      
5 A1 1440 1386 3.26      
6 A1 1155 1112 2.20      
7 A1 1102 1061 18.41      
8 A1 1042 1004 14.58      
9 A1 860 828 0.28      
10 A2 816 785 0.00      
11 A2 760 732 0.00      
12 A2 515 496 0.00      
13 B1 871 839 17.37      
14 B1 695 670 85.18      
15 B1 638 614 99.00      
16 B1 495 477 9.30      
17 B2 3253 3133 17.57      
18 B2 3224 3105 0.64      
19 B2 2839 2735 4140.41      
20 B2 1375 1325 81.18      
21 B2 1313 1264 1.91      
22 B2 1176 1133 15.58      
23 B2 945 910 0.71      
24 B2 852 820 7.05      

Unscaled Zero Point Vibrational Energy (zpe) 18331.7 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 17655.3 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 MP2/LANL2DZ
ABC
0.29815 0.27470 0.14297

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.241
C2 0.000 1.145 0.404
C3 0.000 0.699 -1.025
C4 0.000 -0.699 -1.025
C5 0.000 -1.145 0.404
H6 0.000 0.000 2.328
H7 0.000 2.185 0.734
H8 0.000 1.359 -1.892
H9 0.000 -1.359 -1.892
H10 0.000 -2.185 0.734

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10
C11.41842.37122.37121.41841.08742.24293.41493.41492.2429
C21.41841.49682.33282.29032.23941.09082.30583.39723.3463
C32.37121.49681.39792.33283.42532.30241.08972.23303.3777
C42.37122.33281.39791.49683.42533.37772.23301.08972.3024
C51.41842.29032.33281.49682.23943.34633.39722.30581.0908
H61.08742.23943.42533.42532.23942.70484.43374.43372.7048
H72.24291.09082.30243.37773.34632.70482.75274.41054.3696
H83.41492.30581.08972.23303.39724.43372.75272.71774.4105
H93.41493.39722.23301.08972.30584.43374.41052.71772.7527
H102.24293.34633.37772.30241.09082.70484.36964.41052.7527

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 108.820 C1 C2 H7 126.229
C1 C5 C4 108.820 C1 C5 H10 126.229
C2 C1 C5 107.671 C2 C1 H6 126.164
C2 C3 C4 107.344 C2 C3 H8 125.383
C3 C2 H7 124.951 C3 C4 C5 107.344
C3 C4 H9 127.273 C4 C3 H8 127.273
C4 C5 H10 124.951 C5 C1 H6 126.164
C5 C4 H9 125.383
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability