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

using model chemistry: HF/3-21G*

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/3-21G*
 hartrees
Energy at 0K-191.717079
Energy at 298.15K-191.723658
HF Energy-191.717079
Nuclear repulsion energy156.907031
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/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 3427 3093 4.05      
2 A1 3395 3064 6.53      
3 A1 3201 2889 8.55      
4 A1 1707 1540 1.02      
5 A1 1587 1432 9.88      
6 A1 1515 1368 10.50      
7 A1 1252 1130 0.37      
8 A1 1026 926 0.01      
9 A1 940 848 8.37      
10 A1 901 813 0.02      
11 A2 1289 1164 0.00      
12 A2 1123 1014 0.00      
13 A2 849 766 0.00      
14 A2 582 525 0.00      
15 B1 3233 2918 10.45      
16 B1 1127 1017 0.66      
17 B1 1032 931 38.98      
18 B1 768 693 105.32      
19 B1 383 345 9.41      
20 B2 3414 3082 23.74      
21 B2 3387 3057 1.37      
22 B2 1787 1613 1.50      
23 B2 1453 1312 0.05      
24 B2 1390 1255 8.48      
25 B2 1236 1116 1.15      
26 B2 1022 922 16.24      
27 B2 897 810 2.79      

Unscaled Zero Point Vibrational Energy (zpe) 21960.8 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 19821.8 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/3-21G*
ABC
0.28421 0.27320 0.14299

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.880 0.000 1.864
H2 -0.880 0.000 1.864
H3 0.000 2.201 0.595
H4 0.000 -2.201 0.595
H5 0.000 1.343 -1.868
H6 0.000 -1.343 -1.868
C7 0.000 1.182 0.272
C8 0.000 -1.182 0.272
C9 0.000 0.000 1.226
C10 0.000 0.742 -0.983
C11 0.000 -0.742 -0.983

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 C9 C10 C11
H11.76082.68822.68824.06234.06232.16942.16941.08673.07093.0709
H21.76082.68822.68824.06234.06232.16942.16941.08673.07093.0709
H32.68822.68824.40132.60864.31541.06903.39792.28942.14913.3396
H42.68822.68824.40134.31542.60863.39791.06902.28943.33962.1491
H54.06234.06232.60864.31542.68522.14573.30923.37331.06922.2650
H64.06234.06234.31542.60862.68523.30922.14573.37332.26501.0692
C72.16942.16941.06903.39792.14573.30922.36371.51941.32962.2972
C82.16942.16943.39791.06903.30922.14572.36371.51942.29721.3296
C91.08671.08672.28942.28943.37333.37331.51941.51942.33112.3311
C103.07093.07092.14913.33961.06922.26501.32962.29722.33111.4847
C113.07093.07093.33962.14912.26501.06922.29721.32962.33111.4847

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 108.225 H1 C9 C7 111.618
H1 C9 C8 111.618 H2 C9 C7 111.618
H2 C9 C8 111.618 H3 C7 C9 123.433
H3 C7 C10 126.930 H4 C8 C9 123.433
H4 C8 C11 126.930 H5 C10 C7 126.547
H5 C10 C11 124.152 H6 C11 C8 126.547
H6 C11 C10 124.152 C7 C9 C8 102.124
C7 C10 C11 109.301 C8 C11 C10 109.301
C9 C7 C10 109.637 C9 C8 C11 109.637
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.242      
2 H 0.242      
3 H 0.229      
4 H 0.229      
5 H 0.233      
6 H 0.233      
7 C -0.217      
8 C -0.217      
9 C -0.492      
10 C -0.242      
11 C -0.242      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.385 0.385
CHELPG -0.314 0.076 0.000 0.323
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 2.939 0.000 0.000
y 0.000 7.004 0.000
z 0.000 0.000 8.377


<r2> (average value of r2) Å2
<r2> 92.979
(<r2>)1/2 9.643