return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C5H6 (Bicyclo[2.1.0]pent-2-ene)

using model chemistry: MP2=FULL/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/6-311G*
 hartrees
Energy at 0K-193.513527
Energy at 298.15K-193.519788
HF Energy-192.742115
Nuclear repulsion energy160.171377
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=FULL/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3254 3082 11.41      
2 A 3244 3072 13.86      
3 A 3239 3068 22.25      
4 A 3142 2976 24.16      
5 A 1563 1480 3.74      
6 A 1504 1424 3.24      
7 A 1316 1246 1.72      
8 A 1220 1156 1.27      
9 A 1125 1066 2.07      
10 A 1053 997 1.97      
11 A 979 927 4.23      
12 A 868 822 2.98      
13 A 824 780 0.23      
14 A 739 700 75.15      
15 A 424 401 9.04      
16 A 3240 3069 10.82      
17 A 3210 3040 8.38      
18 A 1328 1258 23.10      
19 A 1233 1168 0.42      
20 A 1098 1040 7.96      
21 A 1055 999 0.91      
22 A 1052 997 7.25      
23 A 965 914 0.70      
24 A 869 823 9.58      
25 A 821 777 15.54      
26 A 798 755 21.63      
27 A 450 426 1.37      

Unscaled Zero Point Vibrational Energy (zpe) 20304.8 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 19230.7 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=FULL/6-311G*
ABC
0.36044 0.21836 0.17470

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.269 1.051 0.678
C2 -0.269 1.051 -0.678
C3 -0.269 -0.461 0.764
C4 -0.269 -0.461 -0.764
C5 0.926 -1.002 0.000
H6 -0.111 1.821 1.427
H7 -0.111 1.821 -1.427
H8 -0.884 -1.093 1.393
H9 -0.884 -1.093 -1.393
H10 1.851 -0.432 0.000
H11 1.041 -2.085 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.35521.51452.08892.47021.08622.24682.34213.04342.67443.4654
C21.35522.08891.51452.47022.24681.08623.04342.34212.67443.4654
C31.51452.08891.52711.51782.38193.16741.08352.33022.25352.2218
C42.08891.51451.52711.51783.16742.38192.33021.08352.25352.2218
C52.47022.47021.51781.51783.32893.32892.28622.28621.08651.0889
H61.08622.24682.38193.16743.32892.85453.01464.12833.31094.3151
H72.24681.08623.16742.38193.32892.85454.12833.01463.31094.3151
H82.34213.04341.08352.33022.28623.01464.12832.78683.13992.5755
H93.04342.34212.33021.08352.28624.12833.01462.78683.13992.5755
H102.67442.67442.25352.25351.08653.31093.31093.13993.13991.8406
H113.46543.46542.22182.22181.08894.31514.31512.57552.57551.8406

picture of Bicyclo[2.1.0]pent-2-ene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 93.253 C1 C2 H7 133.640
C1 C3 C4 86.747 C1 C3 C5 109.103
C1 C3 H8 127.943 C2 C1 C3 93.253
C2 C1 H6 133.640 C2 C4 C3 86.747
C2 C4 C5 109.103 C2 C4 H9 127.943
C3 C1 H6 131.960 C3 C4 C5 59.797
C3 C4 H9 125.542 C3 C5 C4 60.407
C3 C5 H10 118.896 C3 C5 H11 115.957
C4 C2 H7 131.960 C4 C3 C5 59.797
C4 C3 H8 125.542 C4 C5 H10 118.896
C4 C5 H11 115.957 C5 C3 H8 122.125
C5 C4 H9 122.125 H10 C5 H11 115.576
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability