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: mPW1PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31+G**
 hartrees
Energy at 0K-193.998054
Energy at 298.15K-194.004343
Nuclear repulsion energy160.567500
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 mPW1PW91/6-31+G**
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 3255 3098 8.02      
2 A 3245 3088 35.05      
3 A 3236 3080 18.46      
4 A 3229 3074 3.56      
5 A 3219 3064 4.29      
6 A 3135 2984 30.81      
7 A 1628 1550 8.94      
8 A 1487 1416 3.16      
9 A 1332 1268 24.19      
10 A 1321 1257 1.36      
11 A 1232 1173 0.03      
12 A 1221 1162 1.10      
13 A 1123 1069 2.03      
14 A 1093 1041 5.10      
15 A 1053 1002 0.88      
16 A 1048 997 2.35      
17 A 1047 997 8.80      
18 A 978 930 5.15      
19 A 966 919 2.61      
20 A 905 861 9.29      
21 A 893 850 2.71      
22 A 832 792 6.61      
23 A 817 778 0.41      
24 A 800 761 33.62      
25 A 747 711 82.73      
26 A 457 435 0.96      
27 A 427 406 8.02      

Unscaled Zero Point Vibrational Energy (zpe) 20362.7 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 19381.2 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 mPW1PW91/6-31+G**
ABC
0.36450 0.21839 0.17518

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.080 -0.672 0.097
C2 -1.081 0.672 0.097
C3 0.346 -0.758 -0.405
C4 0.346 0.758 -0.405
C5 1.255 -0.000 0.538
H6 -1.761 -1.424 0.480
H7 -1.762 1.424 0.480
H8 0.731 -1.397 -1.190
H9 0.731 1.397 -1.190
H10 1.035 -0.000 1.603
H11 2.313 -0.000 0.284

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.34391.51442.08102.46971.08452.23682.33753.03632.68253.4648
C21.34392.08101.51442.46982.23681.08453.03622.33752.68273.4650
C31.51442.08101.51591.51362.38073.15981.08312.32562.25442.2185
C42.08101.51441.51591.51363.15992.38072.32561.08312.25442.2186
C52.46972.46981.51361.51363.33583.33602.28322.28321.08691.0887
H61.08452.23682.38073.15993.33582.84783.00074.11843.33294.3208
H72.23681.08453.15982.38073.33602.84784.11833.00063.33334.3211
H82.33753.03621.08312.32562.28323.00074.11832.79413.13762.5747
H93.03632.33752.32561.08312.28324.11843.00062.79413.13762.5747
H102.68252.68272.25442.25441.08693.33293.33333.13763.13761.8363
H113.46483.46502.21852.21861.08874.32084.32112.57472.57471.8363

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 93.257 C1 C2 H7 133.896
C1 C3 C4 86.746 C1 C3 C5 109.297
C1 C3 H8 127.513 C2 C1 C3 93.255
C2 C1 H6 133.899 C2 C4 C3 86.742
C2 C4 C5 109.305 C2 C4 H9 127.509
C3 C1 H6 132.001 C3 C4 C5 59.949
C3 C4 H9 126.160 C3 C5 C4 60.102
C3 C5 H10 119.293 C3 C5 H11 116.017
C4 C2 H7 131.998 C4 C3 C5 59.950
C4 C3 H8 126.162 C4 C5 H10 119.294
C4 C5 H11 116.018 C5 C3 H8 122.239
C5 C4 H9 122.237 H10 C5 H11 115.130
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.173      
2 C -0.173      
3 C -0.114      
4 C -0.114      
5 C -0.395      
6 H 0.149      
7 H 0.149      
8 H 0.166      
9 H 0.166      
10 H 0.173      
11 H 0.165      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.501 -0.000 0.025 0.502
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.335 0.000 -1.690
y 0.000 -29.820 -0.000
z -1.690 -0.000 -30.847
Traceless
 xyz
x 0.998 0.000 -1.690
y 0.000 0.271 -0.000
z -1.690 -0.000 -1.269
Polar
3z2-r2-2.538
x2-y20.485
xy0.000
xz-1.690
yz-0.000


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> 87.361
(<r2>)1/2 9.347