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All results from a given calculation for C5H8 (Bicyclo[2.1.0]pentane)

using model chemistry: HF/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 HF/6-31G
 hartrees
Energy at 0K-193.837907
Energy at 298.15K-193.847444
Nuclear repulsion energy176.154460
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/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' 3396 3066 31.57      
2 A' 3374 3047 6.05      
3 A' 3290 2971 38.64      
4 A' 3284 2965 51.91      
5 A' 3226 2913 58.63      
6 A' 1663 1502 1.80      
7 A' 1640 1481 3.88      
8 A' 1488 1344 0.80      
9 A' 1379 1245 2.13      
10 A' 1323 1195 0.52      
11 A' 1233 1113 0.74      
12 A' 1135 1025 0.11      
13 A' 1050 948 7.23      
14 A' 1047 945 3.07      
15 A' 972 878 1.71      
16 A' 860 777 2.90      
17 A' 841 759 11.60      
18 A' 462 418 0.62      
19 A" 3377 3049 20.57      
20 A" 3263 2946 0.21      
21 A" 3213 2901 59.00      
22 A" 1642 1482 0.56      
23 A" 1441 1301 7.37      
24 A" 1418 1280 0.01      
25 A" 1346 1215 0.15      
26 A" 1267 1144 1.96      
27 A" 1245 1124 1.01      
28 A" 1191 1076 2.95      
29 A" 1072 968 4.83      
30 A" 1030 930 0.62      
31 A" 847 765 23.72      
32 A" 782 706 0.23      
33 A" 301 272 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 27549.9 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 24874.8 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/6-31G
ABC
0.30544 0.20379 0.15945

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.248 -0.542 0.764
C2 -0.248 -0.542 -0.764
C3 -0.248 0.994 0.784
C4 -0.248 0.994 -0.784
C5 0.947 -1.044 0.000
H6 -0.791 -1.166 1.443
H7 -0.791 -1.166 -1.443
H8 0.601 1.458 1.271
H9 0.601 1.458 -1.271
H10 -1.156 1.416 1.194
H11 -1.156 1.416 -1.194
H12 1.861 -0.478 0.000
H13 1.097 -2.108 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52811.53612.18091.50481.07062.35742.23112.97692.20052.91392.24432.2013
C21.52812.18091.53611.50482.35741.07062.97692.23112.91392.20052.24432.2013
C31.53612.18091.56842.48972.32303.15021.08322.27151.08162.21692.68903.4709
C42.18091.53611.56842.48973.15022.32302.27151.08322.21691.08162.68903.4709
C51.50481.50482.48972.48972.26262.26262.82792.82793.44973.44971.07561.0741
H61.07062.35742.32303.15022.26262.88682.97574.02402.61973.70893.09712.5565
H72.35741.07063.15022.32302.26262.88684.02402.97573.70892.61973.09712.5565
H82.23112.97691.08322.27152.82792.97574.02402.54181.75913.02712.63643.8181
H92.97692.23112.27151.08322.82794.02402.97572.54183.02711.75912.63643.8181
H102.20052.91391.08162.21693.44972.61973.70891.75913.02712.38773.75694.3496
H112.91392.20052.21691.08163.44973.70892.61973.02711.75912.38773.75694.3496
H122.24432.24432.68902.68901.07563.09713.09712.63642.63643.75693.75691.8003
H132.20132.20133.47093.47091.07412.55652.55653.81813.81814.34964.34961.8003

picture of Bicyclo[2.1.0]pentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 90.751 C1 C2 C5 59.486
C1 C2 H7 129.386 C1 C3 C4 89.249
C1 C3 H8 115.735 C1 C3 H10 113.270
C1 C5 C2 61.028 C1 C5 H12 119.943
C1 C5 H13 116.210 C2 C1 C3 90.751
C2 C1 C5 59.486 C2 C1 H6 129.386
C2 C4 C3 89.249 C2 C4 H9 115.735
C2 C4 H11 113.270 C2 C5 H12 119.943
C2 C5 H13 116.210 C3 C1 C5 109.911
C3 C1 H6 125.080 C3 C4 H9 116.702
C3 C4 H11 112.258 C4 C2 C5 109.911
C4 C2 H7 125.080 C4 C3 H8 116.702
C4 C3 H10 112.258 C5 C1 H6 122.030
C5 C2 H7 122.030 H8 C3 H10 108.700
H9 C4 H11 108.700 H12 C5 H13 113.751
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.226 -0.047    
2 C -0.226 -0.047    
3 C -0.285 -0.039    
4 C -0.285 -0.386    
5 C -0.324 -0.039    
6 H 0.180 0.071    
7 H 0.180 0.071    
8 H 0.156 0.030    
9 H 0.156 0.031    
10 H 0.166 0.159    
11 H 0.166 0.137    
12 H 0.166 0.031    
13 H 0.176 0.030    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.268 -0.068 0.000 0.277
CHELPG -0.015 0.000 -0.214 0.215
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.763 0.149 0.000
y 0.149 -31.015 0.000
z 0.000 0.000 -32.812
Traceless
 xyz
x 0.150 0.149 0.000
y 0.149 1.273 0.000
z 0.000 0.000 -1.423
Polar
3z2-r2-2.846
x2-y2-0.748
xy0.149
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.294 0.000 0.115
y 0.000 6.716 0.000
z 0.115 0.000 6.331


<r2> (average value of r2) Å2
<r2> 98.285
(<r2>)1/2 9.914