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

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-31.537735
Energy at 298.15K-31.543816
HF Energy-30.897594
Nuclear repulsion energy80.792796
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/CEP-121G*
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' 3252 3098 4.42      
2 A' 3245 3092 26.43      
3 A' 3229 3076 11.57      
4 A' 3220 3068 2.12      
5 A' 3058 2914 9.68      
6 A' 1602 1526 0.05      
7 A' 1528 1456 0.77      
8 A' 1452 1383 12.06      
9 A' 1411 1344 10.74      
10 A' 1324 1262 2.01      
11 A' 1283 1222 0.67      
12 A' 1129 1076 0.27      
13 A' 1116 1063 1.83      
14 A' 1028 979 0.26      
15 A' 990 943 11.88      
16 A' 942 898 10.26      
17 A' 806 768 4.71      
18 A' 802 764 0.00      
19 A" 3108 2961 9.50      
20 A" 1126 1073 0.00      
21 A" 921 878 35.47      
22 A" 894 852 0.05      
23 A" 846 806 0.00      
24 A" 677 645 0.00      
25 A" 664 633 100.29      
26 A" 488 465 0.00      
27 A" 311 296 7.99      

Unscaled Zero Point Vibrational Energy (zpe) 20224.3 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 19269.7 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/CEP-121G*
ABC
0.27757 0.27116 0.14077

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 1.865 0.884
H2 0.000 1.865 -0.884
C3 0.000 1.210 0.000
H4 -2.224 0.598 0.000
C5 -1.187 0.273 0.000
H6 2.224 0.598 0.000
C7 1.187 0.273 0.000
H8 1.359 -1.909 0.000
C9 0.738 -1.016 0.000
H10 -1.359 -1.909 0.000
C11 -0.738 -1.016 0.000

Atom - Atom Distances (Å)
  H1 H2 C3 H4 C5 H6 C7 H8 C9 H10 C11
H11.76841.10042.70812.17372.70812.17374.10763.10314.10763.1031
H21.76841.10042.70812.17372.70812.17374.10763.10314.10763.1031
C31.10041.10042.30671.51222.30671.51223.40232.34563.40232.3456
H42.70812.70812.30671.08654.44793.42644.37263.37352.65202.1936
C52.17372.17371.51221.08653.42642.37413.35312.31742.18921.3654
H62.70812.70812.30674.44793.42641.08652.65202.19364.37263.3735
C72.17372.17371.51223.42642.37411.08652.18921.36543.35312.3174
H84.10764.10763.40234.37263.35312.65202.18921.08722.71732.2792
C93.10313.10312.34563.37352.31742.19361.36541.08722.27921.4768
H104.10764.10763.40232.65202.18924.37263.35312.71732.27921.0872
C113.10313.10312.34562.19361.36543.37352.31742.27921.47681.0872

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 33.110 H1 C9 C7 36.985
H1 C9 C8 153.941 H2 C9 C7 36.985
H2 C9 C8 153.941 H3 C7 C9 109.097
H3 C7 C10 78.887 H4 C8 C9 20.231
H4 C8 C11 11.919 H5 C10 C7 44.897
H5 C10 C11 30.291 H6 C11 C8 51.647
H6 C11 C10 153.371 C7 C9 C8 126.029
C7 C10 C11 14.606 C8 C11 C10 101.724
C9 C7 C10 30.210 C9 C8 C11 32.149
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability