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: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-193.957461
Energy at 298.15K-193.963721
Nuclear repulsion energy160.372030
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 B3PW91/6-31G*
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 3236 3096 7.80      
2 A 3227 3088 49.73      
3 A 3215 3075 2.07      
4 A 3126 2990 33.04      
5 A 1631 1560 5.32      
6 A 1498 1433 1.10      
7 A 1321 1264 1.00      
8 A 1221 1168 1.51      
9 A 1125 1076 1.50      
10 A 1048 1003 2.02      
11 A 978 935 3.28      
12 A 893 855 3.78      
13 A 818 783 0.21      
14 A 744 712 62.39      
15 A 423 405 5.70      
16 A 3219 3079 23.06      
17 A 3199 3060 7.14      
18 A 1333 1275 21.37      
19 A 1232 1178 0.06      
20 A 1095 1047 5.51      
21 A 1058 1012 2.87      
22 A 1048 1003 2.67      
23 A 965 923 2.82      
24 A 896 857 9.60      
25 A 830 794 5.50      
26 A 796 762 27.63      
27 A 459 439 1.79      

Unscaled Zero Point Vibrational Energy (zpe) 20316.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 19436.5 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 B3PW91/6-31G*
ABC
0.36424 0.21754 0.17467

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.268 1.054 0.672
C2 -0.268 1.054 -0.672
C3 -0.268 -0.460 0.758
C4 -0.268 -0.460 -0.758
C5 0.924 -1.009 0.000
H6 -0.121 1.824 1.425
H7 -0.121 1.824 -1.425
H8 -0.885 -1.084 1.396
H9 -0.885 -1.084 -1.396
H10 1.862 -0.457 0.000
H11 1.031 -2.095 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.34361.51662.08262.47531.08712.23872.34043.03812.69603.4717
C21.34362.08261.51662.47532.23871.08713.03812.34042.69603.4717
C31.51662.08261.51621.51512.38403.16311.08542.32652.26052.2210
C42.08261.51661.51621.51513.16312.38402.32651.08542.26052.2210
C52.47532.47531.51511.51513.33913.33912.28642.28641.08871.0910
H61.08712.23872.38403.16313.33912.85033.00684.12333.34144.3261
H72.23871.08713.16312.38403.33912.85034.12333.00683.34144.3261
H82.34043.03811.08542.32652.28643.00684.12332.79293.14482.5773
H93.03812.34042.32651.08542.28644.12333.00682.79293.14482.5773
H102.69602.69602.26052.26051.08873.34143.34143.14483.14481.8369
H113.47173.47172.22102.22101.09104.32614.32612.57732.57731.8369

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 93.262 C1 C2 H7 133.866
C1 C3 C4 86.738 C1 C3 C5 109.469
C1 C3 H8 127.398 C2 C1 C3 93.262
C2 C1 H6 133.866 C2 C4 C3 86.738
C2 C4 C5 109.469 C2 C4 H9 127.398
C3 C1 H6 131.889 C3 C4 C5 59.975
C3 C4 H9 126.027 C3 C5 C4 60.049
C3 C5 H10 119.586 C3 C5 H11 115.960
C4 C2 H7 131.889 C4 C3 C5 59.975
C4 C3 H8 126.027 C4 C5 H10 119.586
C4 C5 H11 115.960 C5 C3 H8 122.233
C5 C4 H9 122.233 H10 C5 H11 114.862
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.138     -0.224
2 C -0.138     -0.224
3 C -0.189     0.001
4 C -0.189     0.001
5 C -0.351     -0.414
6 H 0.153     0.165
7 H 0.153     0.165
8 H 0.173     0.093
9 H 0.173     0.093
10 H 0.181     0.180
11 H 0.172     0.161


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.152 -0.360 0.000 0.391
CHELPG        
AIM        
ESP 0.158 -0.356 0.000 0.389


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.741 0.814 0.000
y 0.814 -27.712 0.000
z 0.000 0.000 -29.213
Traceless
 xyz
x -2.278 0.814 0.000
y 0.814 2.265 0.000
z 0.000 0.000 0.013
Polar
3z2-r20.027
x2-y2-3.029
xy0.814
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 87.073
(<r2>)1/2 9.331