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

using model chemistry: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-195.025213
Energy at 298.15K-195.034238
Nuclear repulsion energy175.232035
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 PBEPBE/6-31G(2df,p)
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' 3141 3108 20.83      
2 A' 3119 3087 10.24      
3 A' 3056 3025 40.56      
4 A' 3036 3005 21.69      
5 A' 2985 2955 59.15      
6 A' 1454 1439 1.02      
7 A' 1430 1416 1.67      
8 A' 1329 1316 1.00      
9 A' 1201 1189 0.96      
10 A' 1180 1168 0.19      
11 A' 1103 1091 0.44      
12 A' 1006 995 0.33      
13 A' 966 956 1.73      
14 A' 925 915 6.48      
15 A' 887 878 1.65      
16 A' 765 757 2.78      
17 A' 757 750 4.17      
18 A' 400 396 0.64      
19 A" 3111 3079 24.84      
20 A" 3038 3007 0.82      
21 A" 2977 2947 46.82      
22 A" 1428 1413 0.05      
23 A" 1265 1252 3.92      
24 A" 1213 1201 0.74      
25 A" 1185 1173 0.05      
26 A" 1086 1075 0.01      
27 A" 1042 1031 2.70      
28 A" 1017 1007 0.00      
29 A" 976 966 3.25      
30 A" 907 897 0.21      
31 A" 791 783 10.40      
32 A" 657 650 0.07      
33 A" 258 255 0.42      

Unscaled Zero Point Vibrational Energy (zpe) 24845.9 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 24590.0 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 PBEPBE/6-31G(2df,p)
ABC
0.30269 0.20243 0.15835

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.247 -0.540 0.769
C2 -0.247 -0.540 -0.769
C3 -0.247 0.996 0.784
C4 -0.247 0.996 -0.784
C5 0.946 -1.048 0.000
H6 -0.799 -1.182 1.458
H7 -0.799 -1.182 -1.458
H8 0.613 1.473 1.286
H9 0.613 1.473 -1.286
H10 -1.172 1.426 1.194
H11 -1.172 1.426 -1.194
H12 1.886 -0.483 0.000
H13 1.074 -2.133 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.53841.53572.18401.50741.09172.38272.24843.00202.21382.92852.26822.2079
C21.53842.18401.53571.50742.38271.09173.00202.24842.92852.21382.26822.2079
C31.53572.18401.56752.49232.34593.17391.10362.29121.10012.22592.71093.4855
C42.18401.53571.56752.49233.17392.34592.29121.10362.22591.10012.71093.4855
C51.50741.50742.49232.49232.27772.27772.84882.84883.46863.46861.09691.0932
H61.09172.38272.34593.17392.27772.91573.01164.07052.64783.73843.13442.5568
H72.38271.09173.17392.34592.27772.91574.07053.01163.73842.64783.13442.5568
H82.24843.00201.10362.29122.84883.01164.07052.57211.78793.05622.66433.8559
H93.00202.24842.29121.10362.84884.07053.01162.57213.05621.78792.66433.8559
H102.21382.92851.10012.22593.46862.64783.73841.78793.05622.38873.79774.3748
H112.92852.21382.22591.10013.46863.73842.64783.05621.78792.38873.79774.3748
H122.26822.26822.71092.71091.09693.13443.13442.66432.66433.79773.79771.8396
H132.20792.20793.48553.48551.09322.55682.55683.85593.85594.37484.37481.8396

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 90.543 C1 C2 C5 59.316
C1 C2 H7 129.110 C1 C3 C4 89.457
C1 C3 H8 115.872 C1 C3 H10 113.226
C1 C5 C2 61.367 C1 C5 H12 120.317
C1 C5 H13 115.289 C2 C1 C3 90.543
C2 C1 C5 59.316 C2 C1 H6 129.110
C2 C4 C3 89.457 C2 C4 H9 115.872
C2 C4 H11 113.226 C2 C5 H12 120.317
C2 C5 H13 115.289 C3 C1 C5 109.973
C3 C1 H6 125.628 C3 C4 H9 117.073
C3 C4 H11 111.915 C4 C2 C5 109.973
C4 C2 H7 125.628 C4 C3 H8 117.073
C4 C3 H10 111.915 C5 C1 H6 121.592
C5 C2 H7 121.592 H8 C3 H10 108.442
H9 C4 H11 108.442 H12 C5 H13 114.274
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.042      
2 C -0.042      
3 C -0.240      
4 C -0.240      
5 C -0.278      
6 H 0.089      
7 H 0.089      
8 H 0.104      
9 H 0.104      
10 H 0.113      
11 H 0.113      
12 H 0.110      
13 H 0.118      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.242 -0.090 0.000 0.258
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.945 0.138 0.000
y 0.138 -30.499 0.000
z 0.000 0.000 -31.983
Traceless
 xyz
x 0.296 0.138 0.000
y 0.138 0.966 0.000
z 0.000 0.000 -1.262
Polar
3z2-r2-2.523
x2-y2-0.447
xy0.138
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.092 -0.425 0.000
y -0.425 7.921 0.000
z 0.000 0.000 7.265


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000