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

using model chemistry: HF/CEP-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 HF/CEP-31G*
 hartrees
Energy at 0K-30.805610
Energy at 298.15K-30.812142
Nuclear repulsion energy82.913631
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 HF/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 3412 3064 20.29      
2 A 3393 3047 70.69      
3 A 3382 3037 3.23      
4 A 3294 2958 56.91      
5 A 1755 1576 16.26      
6 A 1620 1455 0.25      
7 A 1425 1280 0.70      
8 A 1310 1176 1.21      
9 A 1194 1073 2.21      
10 A 1108 995 3.46      
11 A 1041 935 6.81      
12 A 979 879 3.14      
13 A 867 779 0.39      
14 A 819 736 100.34      
15 A 462 415 9.05      
16 A 3381 3036 39.27      
17 A 3369 3025 0.22      
18 A 1443 1296 20.31      
19 A 1320 1185 0.31      
20 A 1205 1082 2.98      
21 A 1148 1031 7.09      
22 A 1132 1017 0.05      
23 A 1027 922 5.52      
24 A 979 879 5.89      
25 A 894 803 2.35      
26 A 848 761 44.11      
27 A 485 435 1.12      

Unscaled Zero Point Vibrational Energy (zpe) 21645.2 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 19437.4 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 HF/CEP-31G*
ABC
0.36125 0.21552 0.17328

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.270 1.059 0.675
C2 -0.270 1.059 -0.675
C3 -0.270 -0.468 0.759
C4 -0.270 -0.468 -0.759
C5 0.937 -1.006 0.000
H6 -0.154 1.829 1.423
H7 -0.154 1.829 -1.423
H8 -0.871 -1.083 1.413
H9 -0.871 -1.083 -1.413
H10 1.870 -0.457 0.000
H11 1.041 -2.088 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.34941.52902.09452.48521.08072.23822.34383.05062.70763.4745
C21.34942.09451.52902.48522.23821.08073.05062.34382.70763.4745
C31.52902.09451.51841.52422.39413.17091.08002.33592.27072.2176
C42.09451.52901.51841.52423.17092.39412.33591.08002.27072.2176
C52.48522.48521.52421.52423.35503.35502.29552.29551.08271.0864
H61.08072.23822.39413.17093.35502.84702.99954.12803.36864.3353
H72.23821.08073.17092.39413.35502.84704.12802.99953.36864.3353
H82.34383.05061.08002.33592.29552.99954.12802.82533.14632.5801
H93.05062.34382.33591.08002.29554.12802.99952.82533.14632.5801
H102.70762.70762.27072.27071.08273.36863.36863.14633.14631.8297
H113.47453.47452.21762.21761.08644.33534.33532.58012.58011.8297

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 93.168 C1 C2 H7 133.856
C1 C3 C4 86.832 C1 C3 C5 108.969
C1 C3 H8 127.040 C2 C1 C3 93.168
C2 C1 H6 133.856 C2 C4 C3 86.832
C2 C4 C5 108.969 C2 C4 H9 127.040
C3 C1 H6 132.348 C3 C4 C5 60.126
C3 C4 H9 127.233 C3 C5 C4 59.748
C3 C5 H10 120.206 C3 C5 H11 115.277
C4 C2 H7 132.348 C4 C3 C5 60.126
C4 C3 H8 127.233 C4 C5 H10 120.206
C4 C5 H11 115.277 C5 C3 H8 122.722
C5 C4 H9 122.722 H10 C5 H11 115.034
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.333      
2 C -0.333      
3 C -0.138      
4 C -0.138      
5 C -0.363      
6 H 0.262      
7 H 0.262      
8 H 0.235      
9 H 0.235      
10 H 0.195      
11 H 0.116      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.257 -0.371 0.000 0.451
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.830 0.976 0.000
y 0.976 -28.337 0.000
z 0.000 0.000 -29.447
Traceless
 xyz
x -2.939 0.976 0.000
y 0.976 2.302 0.000
z 0.000 0.000 0.637
Polar
3z2-r21.273
x2-y2-3.494
xy0.976
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.798 0.000 0.000
y 0.000 9.098 0.000
z 0.000 0.000 4.121


<r2> (average value of r2) Å2
<r2> 78.821
(<r2>)1/2 8.878