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 C5H8 (Bicyclo[2.1.0]pentane)

using model chemistry: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-195.009340
Energy at 298.15K-195.018361
Nuclear repulsion energy175.094586
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*
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' 3143 3098 24.25      
2 A' 3122 3077 11.92      
3 A' 3061 3017 47.37      
4 A' 3043 2999 23.07      
5 A' 2992 2949 62.65      
6 A' 1485 1464 0.86      
7 A' 1461 1440 2.00      
8 A' 1347 1327 0.90      
9 A' 1219 1201 1.24      
10 A' 1193 1176 0.24      
11 A' 1113 1097 0.35      
12 A' 1014 1000 0.17      
13 A' 972 958 2.04      
14 A' 928 915 7.14      
15 A' 894 881 2.82      
16 A' 772 761 0.53      
17 A' 763 752 7.58      
18 A' 402 396 0.79      
19 A" 3114 3069 28.14      
20 A" 3043 3000 0.98      
21 A" 2984 2941 50.13      
22 A" 1459 1438 0.05      
23 A" 1282 1263 4.82      
24 A" 1228 1211 1.36      
25 A" 1197 1180 0.10      
26 A" 1097 1082 0.04      
27 A" 1049 1034 3.55      
28 A" 1022 1008 0.00      
29 A" 981 967 4.17      
30 A" 914 901 0.26      
31 A" 793 782 12.19      
32 A" 657 648 0.17      
33 A" 258 254 0.49      

Unscaled Zero Point Vibrational Energy (zpe) 24999.9 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 24642.4 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 PBEPBE/6-31G*
ABC
0.30262 0.20198 0.15805

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.246 -0.539 0.770
C2 -0.246 -0.539 -0.770
C3 -0.246 0.997 0.784
C4 -0.246 0.997 -0.784
C5 0.945 -1.052 0.000
H6 -0.805 -1.181 1.458
H7 -0.805 -1.181 -1.458
H8 0.616 1.475 1.286
H9 0.616 1.475 -1.286
H10 -1.173 1.427 1.196
H11 -1.173 1.427 -1.196
H12 1.891 -0.491 0.000
H13 1.070 -2.140 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.53901.53572.18421.50801.09482.38442.24983.00322.21472.93042.27152.2109
C21.53902.18421.53571.50802.38441.09483.00322.24982.93042.21472.27152.2109
C31.53572.18421.56752.49612.34743.17491.10562.29201.10202.22822.71913.4909
C42.18421.53571.56752.49613.17492.34742.29201.10562.22821.10202.71913.4909
C51.50801.50802.49612.49612.28112.28112.85382.85383.47303.47301.09941.0953
H61.09482.38442.34743.17492.28112.91533.01654.07382.64693.73913.14112.5610
H72.38441.09483.17492.34742.28112.91534.07383.01653.73912.64693.14112.5610
H82.24983.00321.10562.29202.85383.01654.07382.57151.79143.05972.67253.8632
H93.00322.24982.29201.10562.85384.07383.01652.57153.05971.79142.67253.8632
H102.21472.93041.10202.22823.47302.64693.73911.79143.05972.39263.80734.3800
H112.93042.21472.22821.10203.47303.73912.64693.05971.79142.39263.80734.3800
H122.27152.27152.71912.71911.09943.14113.14112.67252.67253.80733.80731.8420
H132.21092.21093.49093.49091.09532.56102.56103.86323.86324.38004.38001.8420

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 90.531 C1 C2 C5 59.318
C1 C2 H7 128.943 C1 C3 C4 89.469
C1 C3 H8 115.858 C1 C3 H10 113.181
C1 C5 C2 61.364 C1 C5 H12 120.381
C1 C5 H13 115.350 C2 C1 C3 90.531
C2 C1 C5 59.318 C2 C1 H6 128.943
C2 C4 C3 89.469 C2 C4 H9 115.858
C2 C4 H11 113.181 C2 C5 H12 120.381
C2 C5 H13 115.350 C3 C1 C5 110.183
C3 C1 H6 125.522 C3 C4 H9 117.003
C3 C4 H11 111.987 C4 C2 C5 110.183
C4 C2 H7 125.522 C4 C3 H8 117.003
C4 C3 H10 111.987 C5 C1 H6 121.611
C5 C2 H7 121.611 H8 C3 H10 108.479
H9 C4 H11 108.479 H12 C5 H13 114.123
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.127      
2 C -0.127      
3 C -0.303      
4 C -0.303      
5 C -0.338      
6 H 0.141      
7 H 0.141      
8 H 0.146      
9 H 0.146      
10 H 0.155      
11 H 0.155      
12 H 0.152      
13 H 0.160      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.267 -0.082 0.000 0.280
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.956 0.134 0.000
y 0.134 -30.396 0.000
z 0.000 0.000 -32.086
Traceless
 xyz
x 0.285 0.134 0.000
y 0.134 1.125 0.000
z 0.000 0.000 -1.410
Polar
3z2-r2-2.820
x2-y2-0.560
xy0.134
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.898 -0.387 0.000
y -0.387 7.668 0.000
z 0.000 0.000 6.995


<r2> (average value of r2) Å2
<r2> 98.762
(<r2>)1/2 9.938