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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-193.926966
Energy at 298.15K-193.936453
HF Energy-193.926966
Nuclear repulsion energy176.956258
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' 3374 3031 45.05      
2 A' 3359 3018 1.64      
3 A' 3283 2950 100.06      
4 A' 3279 2946 6.06      
5 A' 3229 2901 70.88      
6 A' 1661 1492 0.49      
7 A' 1642 1475 1.17      
8 A' 1501 1349 2.06      
9 A' 1390 1249 0.84      
10 A' 1323 1189 0.32      
11 A' 1236 1111 0.53      
12 A' 1124 1010 0.06      
13 A' 1056 949 3.20      
14 A' 1040 935 7.69      
15 A' 985 885 0.09      
16 A' 854 768 7.99      
17 A' 853 766 1.95      
18 A' 451 405 0.41      
19 A" 3354 3013 32.13      
20 A" 3262 2931 0.97      
21 A" 3216 2889 64.80      
22 A" 1631 1465 0.06      
23 A" 1454 1306 3.49      
24 A" 1397 1255 0.35      
25 A" 1342 1206 0.03      
26 A" 1243 1117 0.10      
27 A" 1215 1092 1.58      
28 A" 1178 1059 0.44      
29 A" 1072 963 4.70      
30 A" 1025 921 0.00      
31 A" 858 771 17.64      
32 A" 753 677 0.00      
33 A" 292 262 0.35      

Unscaled Zero Point Vibrational Energy (zpe) 27464.7 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 24677.1 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
0.30913 0.20550 0.16121

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 -0.245 -0.538 0.756
C2 -0.245 -0.538 -0.756
C3 -0.245 0.990 0.779
C4 -0.245 0.990 -0.779
C5 0.941 -1.039 0.000
H6 -0.791 -1.170 1.434
H7 -0.791 -1.170 -1.434
H8 0.601 1.458 1.272
H9 0.601 1.458 -1.272
H10 -1.157 1.410 1.186
H11 -1.157 1.410 -1.186
H12 1.865 -0.481 0.000
H13 1.074 -2.107 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.51301.52812.16611.49351.07542.34402.22822.96872.19322.89822.24292.1854
C21.51302.16611.52811.49352.34401.07542.96872.22822.89822.19322.24292.1854
C31.52812.16611.55792.47572.32243.14011.08562.26751.08332.20672.68783.4554
C42.16611.52811.55792.47573.14012.32242.26751.08562.20671.08332.68783.4554
C51.49351.49352.47572.47572.25262.25262.82192.82193.43573.43571.07951.0767
H61.07542.34402.32243.14012.25262.86722.97854.02052.61763.69523.09662.5326
H72.34401.07543.14012.32242.25262.86724.02052.97853.69522.61763.09662.5326
H82.22822.96871.08562.26752.82192.97854.02052.54371.76143.02282.64033.8140
H92.96872.22822.26751.08562.82194.02052.97852.54373.02281.76142.64033.8140
H102.19322.89821.08332.20673.43572.61763.69521.76143.02282.37253.75714.3307
H112.89822.19322.20671.08333.43573.69522.61763.02281.76142.37253.75714.3307
H122.24292.24292.68782.68781.07953.09663.09662.64032.64033.75713.75711.8084
H132.18542.18543.45543.45541.07672.53262.53263.81403.81404.33074.33071.8084

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 90.843 C1 C2 C5 59.568
C1 C2 H7 129.026 C1 C3 C4 89.157
C1 C3 H8 115.932 C1 C3 H10 113.144
C1 C5 C2 60.864 C1 C5 H12 120.457
C1 C5 H13 115.529 C2 C1 C3 90.843
C2 C1 C5 59.568 C2 C1 H6 129.026
C2 C4 C3 89.157 C2 C4 H9 115.932
C2 C4 H11 113.144 C2 C5 H12 120.457
C2 C5 H13 115.529 C3 C1 C5 110.033
C3 C1 H6 125.355 C3 C4 H9 117.001
C3 C4 H11 112.084 C4 C2 C5 110.033
C4 C2 H7 125.355 C4 C3 H8 117.001
C4 C3 H10 112.084 C5 C1 H6 121.685
C5 C2 H7 121.685 H8 C3 H10 108.598
H9 C4 H11 108.598 H12 C5 H13 114.005
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 -0.195      
2 C -0.195      
3 C -0.316      
4 C -0.316      
5 C -0.364      
6 H 0.184      
7 H 0.184      
8 H 0.161      
9 H 0.161      
10 H 0.171      
11 H 0.171      
12 H 0.172      
13 H 0.182      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.257 -0.077 0.000 0.268
CHELPG -0.006 0.000 -0.206 0.206
AIM -0.057 -0.120 0.000 0.133
ESP -0.214 -0.088 0.000 0.232


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.407 0.180 -0.001
y 0.180 -30.869 -0.002
z -0.001 -0.002 -32.471
Traceless
 xyz
x 0.263 0.180 -0.001
y 0.180 1.070 -0.002
z -0.001 -0.002 -1.333
Polar
3z2-r2-2.666
x2-y2-0.538
xy0.180
xz-0.001
yz-0.002


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.545 -0.376 -0.001
y -0.376 7.109 -0.000
z -0.001 -0.000 6.663


<r2> (average value of r2) Å2
<r2> 97.419
(<r2>)1/2 9.870