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All results from a given calculation for C5H6 (1,3-Cyclopentadiene)

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-30.881392
Energy at 298.15K-30.887848
HF Energy-30.881392
Nuclear repulsion energy80.917986
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 HF/CEP-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 A' 3423 3074 6.18      
2 A' 3414 3066 49.14      
3 A' 3392 3046 22.33      
4 A' 3381 3036 1.14      
5 A' 3221 2893 35.62      
6 A' 1798 1615 0.30      
7 A' 1732 1555 2.63      
8 A' 1570 1410 3.57      
9 A' 1514 1359 10.67      
10 A' 1447 1299 1.01      
11 A' 1385 1244 0.36      
12 A' 1209 1086 0.22      
13 A' 1194 1072 1.59      
14 A' 1071 962 0.89      
15 A' 1036 930 14.02      
16 A' 984 884 8.45      
17 A' 846 759 8.41      
18 A' 844 758 0.02      
19 A" 3259 2926 39.81      
20 A" 1241 1114 0.00      
21 A" 1071 961 1.91      
22 A" 1063 955 0.00      
23 A" 1016 912 54.53      
24 A" 813 730 0.00      
25 A" 751 675 101.15      
26 A" 542 487 0.00      
27 A" 362 325 6.52      

Unscaled Zero Point Vibrational Energy (zpe) 21788.2 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 19565.8 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 HF/CEP-31G*
ABC
0.27858 0.27058 0.14084

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 1.864 0.880
H2 0.000 1.864 -0.880
C3 0.000 1.215 0.000
H4 -2.216 0.590 0.000
C5 -1.186 0.267 0.000
H6 2.216 0.590 0.000
C7 1.186 0.267 0.000
H8 1.359 -1.901 0.000
C9 0.745 -1.013 0.000
H10 -1.359 -1.901 0.000
C11 -0.745 -1.013 0.000

Atom - Atom Distances (Å)
  H1 H2 C3 H4 C5 H6 C7 H8 C9 H10 C11
H11.76061.09352.70352.17572.70352.17574.09803.09924.09803.0992
H21.76061.09352.70352.17572.70352.17574.09803.09924.09803.0992
C31.09351.09352.30251.51902.30251.51903.39942.34933.39942.3493
H42.70352.70352.30251.07894.43183.41764.35703.36702.63352.1748
C52.17572.17571.51901.07893.41762.37293.34332.31712.17421.3533
H62.70352.70352.30254.43183.41761.07892.63352.17484.35693.3670
C72.17572.17571.51903.41762.37291.07892.17421.35333.34332.3171
H84.09804.09803.39944.35703.34332.63352.17421.07952.71852.2843
C93.09923.09922.34933.36702.31712.17481.35331.07952.28431.4908
H104.09804.09803.39942.63352.17424.35693.34332.71852.28431.0795
C113.09923.09922.34932.17481.35333.36702.31712.28431.49081.0795

picture of 1,3-Cyclopentadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C9 H2 33.002 H1 C9 C7 36.956
H1 C9 C8 154.190 H2 C9 C7 36.956
H2 C9 C8 154.190 H3 C7 C9 109.620
H3 C7 C10 79.051 H4 C8 C9 20.483
H4 C8 C11 11.984 H5 C10 C7 45.031
H5 C10 C11 30.099 H6 C11 C8 51.292
H6 C11 C10 153.075 C7 C9 C8 126.321
C7 C10 C11 14.932 C8 C11 C10 101.783
C9 C7 C10 30.569 C9 C8 C11 32.468
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.113      
2 H 0.113      
3 C -0.108      
4 H 0.280      
5 C -0.363      
6 H 0.280      
7 C -0.363      
8 H 0.280      
9 C -0.257      
10 H 0.280      
11 C -0.257      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.393 0.000 0.393
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.798 0.000 0.000
y 0.000 9.098 0.000
z 0.000 0.000 4.121


<r2> (average value of r2) Å2
<r2> 78.821
(<r2>)1/2 8.878