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

using model chemistry: HF/CEP-121G

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-121G
 hartrees
Energy at 0K-30.721768
Energy at 298.15K-30.728382
Nuclear repulsion energy82.674330
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-121G
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 3390 3093 9.65      
2 A 3369 3074 57.94      
3 A 3355 3061 5.90      
4 A 3245 2961 38.79      
5 A 1688 1540 12.54      
6 A 1600 1460 2.72      
7 A 1394 1272 0.46      
8 A 1290 1177 1.99      
9 A 1190 1086 3.30      
10 A 1102 1006 1.43      
11 A 1031 941 6.13      
12 A 988 902 2.33      
13 A 862 787 0.44      
14 A 836 763 122.01      
15 A 474 432 7.94      
16 A 3358 3064 25.47      
17 A 3342 3050 0.99      
18 A 1424 1300 25.48      
19 A 1331 1214 0.05      
20 A 1228 1121 2.12      
21 A 1159 1057 11.24      
22 A 1140 1040 2.16      
23 A 1037 946 10.22      
24 A 968 884 0.65      
25 A 928 847 0.13      
26 A 834 761 46.97      
27 A 499 455 1.70      

Unscaled Zero Point Vibrational Energy (zpe) 21530.9 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 19647.0 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-121G
ABC
0.35864 0.21370 0.17147

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.271 1.064 0.675
C2 -0.271 1.064 -0.675
C3 -0.271 -0.471 0.767
C4 -0.271 -0.471 -0.767
C5 0.943 -1.014 0.000
H6 -0.173 1.830 1.420
H7 -0.173 1.830 -1.420
H8 -0.863 -1.077 1.425
H9 -0.863 -1.077 -1.425
H10 1.861 -0.452 0.000
H11 1.067 -2.086 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.34921.53792.10622.49951.07332.23252.34433.05642.70183.4880
C21.34922.10621.53792.49952.23251.07333.05642.34432.70183.4880
C31.53792.10621.53491.53562.39373.17641.07192.35032.26602.2330
C42.10621.53791.53491.53563.17642.39372.35031.07192.26602.2330
C52.49952.49951.53561.53563.36883.36882.30102.30101.07591.0790
H61.07332.23252.39373.17643.36882.84022.98734.12553.37054.3457
H72.23251.07333.17642.39373.36882.84024.12552.98733.37054.3457
H82.34433.05641.07192.35032.30102.98734.12552.85043.13632.6020
H93.05642.34432.35031.07192.30104.12552.98732.85043.13632.6020
H102.70182.70182.26602.26601.07593.37053.37053.13633.13631.8162
H113.48803.48802.23302.23301.07904.34574.34572.60202.60201.8162

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 93.462 C1 C2 H7 133.995
C1 C3 C4 86.538 C1 C3 C5 108.823
C1 C3 H8 126.950 C2 C1 C3 93.462
C2 C1 H6 133.995 C2 C4 C3 86.538
C2 C4 C5 108.823 C2 C4 H9 126.950
C3 C1 H6 132.090 C3 C4 C5 60.015
C3 C4 H9 127.853 C3 C5 C4 59.970
C3 C5 H10 119.338 C3 C5 H11 116.218
C4 C2 H7 132.090 C4 C3 C5 60.015
C4 C3 H8 127.853 C4 C5 H10 119.338
C4 C5 H11 116.218 C5 C3 H8 122.889
C5 C4 H9 122.889 H10 C5 H11 114.883
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.191      
2 C -0.191      
3 C -0.157      
4 C -0.157      
5 C -0.377      
6 H 0.196      
7 H 0.196      
8 H 0.187      
9 H 0.187      
10 H 0.156      
11 H 0.149      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.206 -0.418 0.000 0.466
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.360 0.772 0.000
y 0.772 -28.715 0.000
z 0.000 0.000 -30.069
Traceless
 xyz
x -2.968 0.772 0.000
y 0.772 2.499 0.000
z 0.000 0.000 0.469
Polar
3z2-r20.937
x2-y2-3.645
xy0.772
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.384 -0.315 0.000
y -0.315 8.038 0.000
z 0.000 0.000 4.481


<r2> (average value of r2) Å2
<r2> 78.889
(<r2>)1/2 8.882