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

using model chemistry: QCISD/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-193.516364
Energy at 298.15K-193.522605
HF Energy-192.801201
Nuclear repulsion energy156.354497
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 QCISD/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3304 3110 4.22      
2 A1 3279 3087 11.82      
3 A1 3098 2917 14.73      
4 A1 1622 1527 1.53      
5 A1 1493 1405 4.66      
6 A1 1449 1364 6.87      
7 A1 1162 1094 0.04      
8 A1 1033 973 0.04      
9 A1 951 896 6.60      
10 A1 817 769 0.01      
11 A2 1163 1095 0.00      
12 A2 922 868 0.00      
13 A2 723 680 0.00      
14 A2 506 477 0.00      
15 B1 3137 2953 14.97      
16 B1 962 906 18.22      
17 B1 944 889 1.63      
18 B1 688 647 60.74      
19 B1 344 324 5.88      
20 B2 3296 3103 29.18      
21 B2 3270 3078 1.86      
22 B2 1689 1590 0.13      
23 B2 1364 1284 1.04      
24 B2 1321 1244 0.80      
25 B2 1146 1079 0.62      
26 B2 1000 941 7.13      
27 B2 821 773 4.38      

Unscaled Zero Point Vibrational Energy (zpe) 20751.2 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 19535.2 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 QCISD/6-31G**
ABC
0.28088 0.27377 0.14228

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.878 0.000 1.876
H2 -0.878 0.000 1.876
H3 0.000 2.210 0.609
H4 0.000 -2.210 0.609
H5 0.000 1.351 -1.883
H6 0.000 -1.351 -1.883
C7 0.000 1.180 0.282
C8 0.000 -1.180 0.282
C9 0.000 0.000 1.222
C10 0.000 0.738 -0.993
C11 0.000 -0.738 -0.993

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 C9 C10 C11
H11.75652.69442.69444.09034.09032.16922.16921.09523.09013.0901
H21.75652.69442.69444.09034.09032.16922.16921.09523.09013.0901
H32.69442.69444.41922.63574.34631.08023.40532.29312.17513.3550
H42.69442.69444.41924.34632.63573.40531.08022.29313.35502.1751
H54.09034.09032.63574.34632.70262.17203.33103.38641.08092.2712
H64.09034.09034.34632.63572.70263.33102.17203.38642.27121.0809
C72.16922.16921.08023.40532.17203.33102.36011.50861.34942.3034
C82.16922.16923.40531.08023.33102.17202.36011.50862.30341.3494
C91.09521.09522.29312.29313.38643.38641.50861.50862.33482.3348
C103.09013.09012.17513.35501.08092.27121.34942.30342.33481.4765
C113.09013.09013.35502.17512.27121.08092.30341.34942.33481.4765

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 106.628 H1 C9 C7 111.852
H1 C9 C8 111.852 H2 C9 C7 111.852
H2 C9 C8 111.852 H3 C7 C9 123.850
H3 C7 C10 126.723 H4 C8 C9 123.850
H4 C8 C11 126.723 H5 C10 C7 126.335
H5 C10 C11 124.555 H6 C11 C8 126.335
H6 C11 C10 124.555 C7 C9 C8 102.925
C7 C10 C11 109.111 C8 C11 C10 109.111
C9 C7 C10 109.427 C9 C8 C11 109.427
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability