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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-192.156878
Energy at 298.15K-192.163113
HF Energy-191.713843
Nuclear repulsion energy154.798000
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 MP2/3-21G*
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 3272 3112 2.82      
2 A1 3241 3083 6.86      
3 A1 3089 2939 3.02      
4 A1 1544 1469 3.14      
5 A1 1507 1434 7.80      
6 A1 1411 1343 7.75      
7 A1 1176 1119 0.33      
8 A1 974 926 0.07      
9 A1 892 848 7.11      
10 A1 844 803 0.01      
11 A2 1186 1129 0.00      
12 A2 903 859 0.00      
13 A2 720 685 0.00      
14 A2 524 498 0.00      
15 B1 3131 2979 6.22      
16 B1 972 925 14.25      
17 B1 932 887 1.49      
18 B1 679 646 94.47      
19 B1 357 339 9.97      
20 B2 3260 3102 18.14      
21 B2 3232 3074 1.70      
22 B2 1598 1520 1.05      
23 B2 1360 1294 0.22      
24 B2 1271 1209 6.58      
25 B2 1162 1105 0.84      
26 B2 963 916 8.93      
27 B2 837 796 1.68      

Unscaled Zero Point Vibrational Energy (zpe) 20517.2 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 19518.1 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 MP2/3-21G*
ABC
0.27530 0.26748 0.13925

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.891 0.000 1.884
H2 -0.891 0.000 1.884
H3 0.000 2.227 0.610
H4 0.000 -2.227 0.610
H5 0.000 1.359 -1.896
H6 0.000 -1.359 -1.896
C7 0.000 1.195 0.282
C8 0.000 -1.195 0.282
C9 0.000 0.000 1.242
C10 0.000 0.747 -1.002
C11 0.000 -0.747 -1.002

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 C9 C10 C11
H11.78132.71582.71584.11464.11462.18872.18871.09813.11153.1115
H21.78132.71582.71584.11464.11462.18872.18871.09813.11153.1115
H32.71582.71584.45392.65214.37511.08253.43822.31482.18823.3831
H42.71582.71584.45394.37512.65213.43821.08252.31483.38312.1882
H54.11464.11462.65214.37512.71852.18383.35693.41961.08342.2884
H64.11464.11464.37512.65212.71853.35692.18383.41962.28841.0834
C72.18872.18871.08253.43822.18383.35692.39101.53341.35962.3286
C82.18872.18873.43821.08253.35692.18382.39101.53342.32861.3596
C91.09811.09812.31482.31483.41963.41961.53341.53342.36502.3650
C103.11153.11152.18823.38311.08342.28841.35962.32862.36501.4947
C113.11153.11153.38312.18822.28841.08342.32861.35962.36501.4947

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 108.406 H1 C9 C7 111.487
H1 C9 C8 111.487 H2 C9 C7 111.487
H2 C9 C8 111.487 H3 C7 C9 123.562
H3 C7 C10 126.911 H4 C8 C9 123.562
H4 C8 C11 126.911 H5 C10 C7 126.367
H5 C10 C11 124.388 H6 C11 C8 126.367
H6 C11 C10 124.388 C7 C9 C8 102.456
C7 C10 C11 109.245 C8 C11 C10 109.245
C9 C7 C10 109.527 C9 C8 C11 109.527
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability