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

using model chemistry: HF/CEP-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/CEP-31G
 hartrees
Energy at 0K-31.929794
Energy at 298.15K-31.939282
Nuclear repulsion energy94.482843
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-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' 3410 3074 73.43      
2 A' 3391 3056 7.98      
3 A' 3312 2986 141.54      
4 A' 3300 2975 32.15      
5 A' 3243 2924 101.34      
6 A' 1648 1485 1.47      
7 A' 1627 1467 4.90      
8 A' 1483 1337 1.88      
9 A' 1381 1245 2.14      
10 A' 1316 1187 1.18      
11 A' 1229 1108 0.38      
12 A' 1119 1009 0.09      
13 A' 1046 943 8.06      
14 A' 1039 936 4.46      
15 A' 982 885 2.22      
16 A' 849 766 7.78      
17 A' 836 753 16.34      
18 A' 450 405 0.62      
19 A" 3377 3044 36.22      
20 A" 3288 2964 0.78      
21 A" 3227 2908 89.72      
22 A" 1625 1464 1.17      
23 A" 1441 1299 5.57      
24 A" 1399 1261 0.29      
25 A" 1330 1199 0.31      
26 A" 1245 1122 2.44      
27 A" 1226 1106 1.16      
28 A" 1174 1058 3.18      
29 A" 1065 960 6.46      
30 A" 1021 920 0.07      
31 A" 843 760 30.74      
32 A" 775 699 0.94      
33 A" 293 264 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 27494.3 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 24783.4 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-31G
ABC
0.29994 0.20029 0.15693

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.252 -0.547 0.772
C2 -0.252 -0.547 -0.772
C3 -0.252 1.002 0.789
C4 -0.252 1.002 -0.789
C5 0.963 -1.050 0.000
H6 -0.795 -1.177 1.454
H7 -0.795 -1.177 -1.454
H8 0.601 1.469 1.279
H9 0.601 1.469 -1.279
H10 -1.164 1.425 1.202
H11 -1.164 1.425 -1.202
H12 1.881 -0.478 0.000
H13 1.112 -2.119 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54361.54832.19871.52481.07582.37642.24622.99922.21492.93542.26952.2204
C21.54362.19871.54831.52482.37641.07582.99922.24622.93542.21492.26952.2204
C31.54832.19871.57892.51142.34143.17401.08882.28601.08702.23102.71363.4962
C42.19871.54831.57892.51143.17402.34142.28601.08882.23101.08702.71363.4962
C51.52481.52482.51142.51142.28462.28462.84772.84773.47783.47781.08141.0797
H61.07582.37642.34143.17402.28462.90862.99594.05192.64053.73693.12432.5766
H72.37641.07583.17402.34142.28462.90864.05192.99593.73692.64053.12432.5766
H82.24622.99921.08882.28602.84772.99594.05192.55881.76723.04542.65823.8430
H92.99922.24622.28601.08882.84774.05192.99592.55883.04541.76722.65823.8430
H102.21492.93541.08702.23103.47782.64053.73691.76723.04542.40403.78714.3807
H112.93542.21492.23101.08703.47783.73692.64053.04541.76722.40403.78714.3807
H122.26952.26952.71362.71361.08143.12433.12432.65822.65823.78713.78711.8117
H132.22042.22043.49623.49621.07972.57662.57663.84303.84304.38074.38071.8117

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 90.653 C1 C2 C5 59.590
C1 C2 H7 129.376 C1 C3 C4 89.347
C1 C3 H8 115.716 C1 C3 H10 113.218
C1 C5 C2 60.821 C1 C5 H12 120.147
C1 C5 H13 115.923 C2 C1 C3 90.653
C2 C1 C5 59.590 C2 C1 H6 129.376
C2 C4 C3 89.347 C2 C4 H9 115.716
C2 C4 H11 113.218 C2 C5 H12 120.147
C2 C5 H13 115.923 C3 C1 C5 109.616
C3 C1 H6 125.355 C3 C4 H9 116.742
C3 C4 H11 112.304 C4 C2 C5 109.616
C4 C2 H7 125.355 C4 C3 H8 116.742
C4 C3 H10 112.304 C5 C1 H6 121.975
C5 C2 H7 121.975 H8 C3 H10 108.618
H9 C4 H11 108.618 H12 C5 H13 113.928
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.157      
2 C -0.157      
3 C -0.273      
4 C -0.273      
5 C -0.370      
6 H 0.236      
7 H 0.236      
8 H 0.123      
9 H 0.123      
10 H 0.107      
11 H 0.107      
12 H 0.162      
13 H 0.136      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.224 0.038 0.000 0.227
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.647 0.235 0.000
y 0.235 -31.144 0.000
z 0.000 0.000 -32.923
Traceless
 xyz
x 0.387 0.235 0.000
y 0.235 1.141 0.000
z 0.000 0.000 -1.528
Polar
3z2-r2-3.055
x2-y2-0.503
xy0.235
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.339 0.000 0.182
y 0.000 7.078 0.000
z 0.182 0.000 6.208


<r2> (average value of r2) Å2
<r2> 84.956
(<r2>)1/2 9.217