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All results from a given calculation for C5H8 (2,3-Pentadiene)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-32.616680
Energy at 298.15K-32.623588
HF Energy-32.017725
Nuclear repulsion energy81.465870
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-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 3198 3037 14.50      
2 A 3184 3023 3.26      
3 A 3167 3007 29.36      
4 A 3081 2925 11.75      
5 A 1532 1454 4.01      
6 A 1508 1432 8.45      
7 A 1460 1387 0.48      
8 A 1430 1358 1.48      
9 A 1169 1110 0.08      
10 A 1110 1053 2.04      
11 A 1074 1020 0.07      
12 A 896 851 36.86      
13 A 834 792 0.11      
14 A 509 484 4.25      
15 A 279 265 1.39      
16 A 167 159 0.15      
17 A 132 125 2.38      
18 A 3199 3037 46.15      
19 A 3184 3023 1.34      
20 A 3167 3007 30.42      
21 A 3081 2925 71.04      
22 A 2047 1943 4.63      
23 A 1517 1440 10.18      
24 A 1507 1431 8.20      
25 A 1439 1366 4.57      
26 A 1315 1248 19.55      
27 A 1127 1070 4.52      
28 A 1071 1017 1.00      
29 A 978 929 13.72      
30 A 699 664 35.30      
31 A 548 520 9.59      
32 A 214 203 1.12      
33 A 147 140 1.68      

Unscaled Zero Point Vibrational Energy (zpe) 24984.8 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 23720.6 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-31G*
ABC
0.54177 0.07258 0.07012

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.435
C2 0.000 1.349 0.428
C3 0.000 -1.349 0.428
C4 -0.907 2.179 -0.477
C5 0.907 -2.179 -0.477
H6 0.680 1.879 1.108
H7 -0.680 -1.879 1.108
H8 -1.569 2.826 0.127
H9 -0.305 2.835 -1.133
H10 -1.531 1.526 -1.108
H11 1.569 -2.826 0.127
H12 0.305 -2.835 -1.133
H13 1.531 -1.526 -1.108

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.34871.34872.53022.53022.10892.10893.24693.25422.65603.24693.25422.6560
C21.34872.69731.52683.75301.09863.36822.17602.17692.17624.46974.47613.6012
C31.34872.69733.75301.52683.36821.09864.46974.47613.60122.17602.17692.1762
C42.53021.52683.75304.72002.26334.36261.10561.10571.10185.61625.20014.4797
C52.53023.75301.52684.72004.36262.26335.61625.20014.47971.10561.10571.1018
H62.10891.09863.36822.26334.36263.99722.63062.62793.15084.88765.23354.1511
H72.10893.36821.09864.36262.26333.99724.88765.23354.15112.63062.62793.1508
H83.24692.17604.46971.10565.61622.63064.88761.78461.79336.46446.09495.4841
H93.25422.17694.47611.10575.20012.62795.23351.78461.79406.09495.70374.7323
H102.65602.17623.60121.10184.47973.15084.15111.79331.79405.48414.73234.3235
H113.24694.46972.17605.61621.10564.88762.63066.46446.09495.48411.78461.7933
H123.25424.47612.17695.20011.10575.23352.62796.09495.70374.73231.78461.7940
H132.65603.60122.17624.47971.10184.15113.15085.48414.73234.32351.79331.7940

picture of 2,3-Pentadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 123.146 C1 C2 H6 118.670
C1 C3 C5 123.146 C1 C3 H7 118.670
C2 C1 C3 179.418 C2 C4 H8 110.489
C2 C4 H9 110.550 C2 C4 H10 110.727
C3 C5 H11 110.489 C3 C5 H12 110.550
C3 C5 H13 110.727 C4 C2 H6 118.183
C5 C3 H7 118.183 H8 C4 H9 107.616
H8 C4 H10 108.658 H9 C4 H10 108.715
H11 C5 H12 107.616 H11 C5 H13 108.658
H12 C5 H13 108.715
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability