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: BLYP/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 BLYP/6-311G*
 hartrees
Energy at 0K-193.964689
Energy at 298.15K-193.970761
Nuclear repulsion energy158.864718
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 BLYP/6-311G*
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 3112 3104 9.46      
2 A 3103 3095 81.75      
3 A 3092 3084 1.95      
4 A 3008 3001 48.76      
5 A 1542 1538 5.38      
6 A 1444 1441 1.78      
7 A 1242 1239 0.80      
8 A 1163 1160 1.32      
9 A 1077 1075 1.92      
10 A 1003 1001 1.58      
11 A 932 930 3.29      
12 A 808 806 3.83      
13 A 776 774 0.01      
14 A 704 703 65.97      
15 A 406 405 7.19      
16 A 3097 3090 31.21      
17 A 3073 3066 16.11      
18 A 1269 1266 22.33      
19 A 1186 1183 0.13      
20 A 1048 1045 6.05      
21 A 1009 1006 0.00      
22 A 1003 1001 6.26      
23 A 905 903 4.06      
24 A 837 835 7.60      
25 A 803 801 1.79      
26 A 753 751 30.98      
27 A 438 437 1.46      

Unscaled Zero Point Vibrational Energy (zpe) 19417.2 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 19368.6 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 BLYP/6-311G*
ABC
0.35827 0.21305 0.17091

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.269 1.066 0.676
C2 -0.269 1.066 -0.676
C3 -0.269 -0.462 0.769
C4 -0.269 -0.462 -0.769
C5 0.930 -1.026 0.000
H6 -0.119 1.842 1.430
H7 -0.119 1.842 -1.430
H8 -0.894 -1.088 1.406
H9 -0.894 -1.088 -1.406
H10 1.877 -0.481 0.000
H11 1.028 -2.118 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.35211.53142.10372.50501.09252.24982.35893.06062.73103.5038
C21.35212.10371.53142.50502.24981.09253.06062.35892.73103.5038
C31.53142.10371.53841.53242.40203.18921.09002.34852.28032.2393
C42.10371.53141.53841.53243.18922.40202.34851.09002.28032.2393
C52.50502.50501.53241.53243.37263.37262.30432.30431.09321.0955
H61.09252.24982.40203.18923.37262.86093.03084.15133.38024.3634
H72.24981.09253.18922.40203.37262.86094.15133.03083.38024.3634
H82.35893.06061.09002.34852.30433.03084.15132.81283.16672.5949
H93.06062.35892.34851.09002.30434.15133.03082.81283.16672.5949
H102.73102.73102.28032.28031.09323.38023.38023.16673.16671.8440
H113.50383.50382.23932.23931.09554.36344.36342.59492.59491.8440

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 93.487 C1 C2 H7 133.673
C1 C3 C4 86.513 C1 C3 C5 109.693
C1 C3 H8 127.473 C2 C1 C3 93.487
C2 C1 H6 133.673 C2 C4 C3 86.513
C2 C4 C5 109.693 C2 C4 H9 127.473
C3 C1 H6 131.815 C3 C4 C5 59.870
C3 C4 H9 125.776 C3 C5 C4 60.260
C3 C5 H10 119.628 C3 C5 H11 115.892
C4 C2 H7 131.815 C4 C3 C5 59.870
C4 C3 H8 125.776 C4 C5 H10 119.628
C4 C5 H11 115.892 C5 C3 H8 122.070
C5 C4 H9 122.070 H10 C5 H11 114.814
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.164      
2 C -0.164      
3 C -0.196      
4 C -0.196      
5 C -0.387      
6 H 0.166      
7 H 0.166      
8 H 0.189      
9 H 0.189      
10 H 0.198      
11 H 0.197      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.133 -0.389 0.000 0.412
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.864 0.871 0.000
y 0.871 -28.767 0.000
z 0.000 0.000 -30.260
Traceless
 xyz
x -2.350 0.871 0.000
y 0.871 2.295 0.000
z 0.000 0.000 0.056
Polar
3z2-r20.111
x2-y2-3.097
xy0.871
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> 89.093
(<r2>)1/2 9.439