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/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/6-31G*
 hartrees
Energy at 0K-193.919938
Energy at 298.15K-193.926019
HF Energy-193.919938
Nuclear repulsion energy158.710567
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/6-31G*
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' 3131 3106 7.01      
2 A' 3124 3098 70.82      
3 A' 3110 3084 3.68      
4 A' 3027 3003 41.49      
5 A' 1558 1546 5.41      
6 A' 1460 1448 0.42      
7 A' 1254 1244 0.47      
8 A' 1172 1163 1.47      
9 A' 1088 1079 1.30      
10 A' 1012 1003 1.72      
11 A' 940 933 2.48      
12 A' 823 817 3.87      
13 A' 784 777 0.07      
14 A' 715 709 51.54      
15 A' 408 405 4.43      
16 A" 3117 3092 29.11      
17 A" 3095 3070 12.02      
18 A" 1284 1274 17.56      
19 A" 1193 1184 0.06      
20 A" 1060 1051 4.43      
21 A" 1016 1008 2.54      
22 A" 1011 1003 1.25      
23 A" 915 908 3.52      
24 A" 841 834 8.53      
25 A" 803 796 1.53      
26 A" 759 753 23.86      
27 A" 441 437 2.01      

Unscaled Zero Point Vibrational Energy (zpe) 19570.1 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 19411.6 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/6-31G*
ABC
0.35729 0.21278 0.17067

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.266 1.069 0.676
C2 -0.266 1.069 -0.676
C3 -0.266 -0.467 0.765
C4 -0.266 -0.467 -0.765
C5 0.930 -1.026 0.000
H6 -0.176 1.839 1.448
H7 -0.176 1.839 -1.448
H8 -0.879 -1.070 1.438
H9 -0.879 -1.070 -1.438
H10 1.885 -0.488 0.000
H11 1.034 -2.119 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.35231.53822.10602.50531.09372.26092.35213.06942.74043.5088
C21.35232.10601.53822.50532.26091.09373.06942.35212.74043.5088
C31.53822.10601.53011.52632.40633.19691.09202.36482.28372.2375
C42.10601.53821.53011.52633.19692.40632.36481.09202.28372.2375
C52.50532.50531.52631.52633.39483.39482.31152.31151.09621.0984
H61.09372.26092.40633.19693.39482.89522.99324.15753.42874.3846
H72.26091.09373.19692.40633.39482.89524.15752.99323.42874.3846
H82.35213.06941.09202.36482.31152.99324.15752.87563.16992.6128
H93.06942.35212.36481.09202.31154.15752.99322.87563.16992.6128
H102.74042.74042.28372.28371.09623.42873.42873.16993.16991.8403
H113.50883.50882.23752.23751.09844.38464.38462.61282.61281.8403

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 93.313 C1 C2 H7 134.856
C1 C3 C4 86.687 C1 C3 C5 109.671
C1 C3 H8 125.982 C2 C1 C3 93.313
C2 C1 H6 134.856 C2 C4 C3 86.687
C2 C4 C5 109.671 C2 C4 H9 125.982
C3 C1 H6 131.458 C3 C4 C5 59.918
C3 C4 H9 128.032 C3 C5 C4 60.164
C3 C5 H10 120.218 C3 C5 H11 116.012
C4 C2 H7 131.458 C4 C3 C5 59.918
C4 C3 H8 128.032 C4 C5 H10 120.218
C4 C5 H11 116.012 C5 C3 H8 123.108
C5 C4 H9 123.108 H10 C5 H11 113.982
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.089      
2 C -0.089      
3 C -0.123      
4 C -0.123      
5 C -0.272      
6 H 0.098      
7 H 0.098      
8 H 0.119      
9 H 0.119      
10 H 0.134      
11 H 0.126      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.126 -0.358 0.000 0.380
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.926 0.742 0.000
y 0.742 -28.276 0.000
z 0.000 0.000 -29.587
Traceless
 xyz
x -1.994 0.742 0.000
y 0.742 1.981 0.000
z 0.000 0.000 0.014
Polar
3z2-r20.028
x2-y2-2.650
xy0.742
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.433 -0.445 0.000
y -0.445 7.932 0.000
z 0.000 0.000 7.228


<r2> (average value of r2) Å2
<r2> 88.791
(<r2>)1/2 9.423