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: B1B95/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31+G**
 hartrees
Energy at 0K-195.194996
Energy at 298.15K-195.204156
Nuclear repulsion energy176.656737
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 B1B95/6-31+G**
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' 3229 3089 23.27      
2 A' 3210 3070 8.06      
3 A' 3143 3007 47.06      
4 A' 3122 2987 24.90      
5 A' 3073 2940 67.41      
6 A' 1508 1443 1.65      
7 A' 1488 1423 3.25      
8 A' 1383 1323 0.48      
9 A' 1255 1201 1.94      
10 A' 1218 1165 0.04      
11 A' 1139 1089 0.59      
12 A' 1041 996 0.33      
13 A' 996 953 3.05      
14 A' 960 919 8.42      
15 A' 921 881 0.57      
16 A' 796 761 7.78      
17 A' 786 751 3.79      
18 A' 409 391 0.52      
19 A" 3201 3062 25.81      
20 A" 3126 2990 0.83      
21 A" 3064 2931 54.72      
22 A" 1477 1413 0.49      
23 A" 1319 1261 7.58      
24 A" 1260 1205 1.55      
25 A" 1222 1169 0.03      
26 A" 1124 1075 0.11      
27 A" 1080 1033 3.21      
28 A" 1055 1009 0.57      
29 A" 1007 963 5.75      
30 A" 935 895 0.33      
31 A" 818 783 17.73      
32 A" 674 645 0.24      
33 A" 261 250 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 25648.6 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 24535.4 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 B1B95/6-31+G**
ABC
0.30736 0.20573 0.16123

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.246 -0.537 0.762
C2 -0.246 -0.537 -0.762
C3 -0.246 0.987 0.777
C4 -0.246 0.987 -0.777
C5 0.942 -1.035 0.000
H6 -0.794 -1.178 1.443
H7 -0.794 -1.178 -1.443
H8 0.609 1.457 1.276
H9 0.609 1.457 -1.276
H10 -1.164 1.413 1.186
H11 -1.164 1.413 -1.186
H12 1.868 -0.461 0.000
H13 1.080 -2.111 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52321.52462.16621.49591.08422.36052.22952.97602.19732.90522.24792.1941
C21.52322.16621.52461.49592.36051.08422.97602.22952.90522.19732.24792.1941
C31.52462.16621.55472.47022.33063.14951.09492.27271.09162.20862.67763.4582
C42.16621.52461.55472.47023.14952.33062.27271.09492.20861.09162.67763.4582
C51.49591.49592.47022.47022.26192.26192.81852.81853.43983.43981.08891.0850
H61.08422.36052.33063.14952.26192.88642.98944.03742.63043.70993.11142.5427
H72.36051.08423.14952.33062.26192.88644.03742.98943.70992.63043.11142.5427
H82.22952.97601.09492.27272.81852.98944.03742.55121.77553.03352.62513.8178
H92.97602.22952.27271.09492.81854.03742.98942.55123.03351.77552.62513.8178
H102.19732.90521.09162.20863.43982.63043.70991.77553.03352.37133.75664.3430
H112.90522.19732.20861.09163.43983.70992.63043.03351.77552.37133.75664.3430
H122.24792.24792.67762.67761.08893.11143.11142.62512.62513.75663.75661.8277
H132.19412.19413.45823.45821.08502.54272.54273.81783.81784.34304.34301.8277

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 90.592 C1 C2 C5 59.396
C1 C2 H7 128.956 C1 C3 C4 89.408
C1 C3 H8 115.691 C1 C3 H10 113.220
C1 C5 C2 61.208 C1 C5 H12 120.011
C1 C5 H13 115.526 C2 C1 C3 90.592
C2 C1 C5 59.396 C2 C1 H6 128.956
C2 C4 C3 89.408 C2 C4 H9 115.691
C2 C4 H11 113.220 C2 C5 H12 120.011
C2 C5 H13 115.526 C3 C1 C5 109.726
C3 C1 H6 125.765 C3 C4 H9 117.071
C3 C4 H11 111.967 C4 C2 C5 109.726
C4 C2 H7 125.765 C4 C3 H8 117.071
C4 C3 H10 111.967 C5 C1 H6 121.668
C5 C2 H7 121.668 H8 C3 H10 108.591
H9 C4 H11 108.591 H12 C5 H13 114.428
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.061      
2 C -0.061      
3 C -0.356      
4 C -0.356      
5 C -0.380      
6 H 0.144      
7 H 0.144      
8 H 0.151      
9 H 0.151      
10 H 0.157      
11 H 0.157      
12 H 0.150      
13 H 0.159      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.273 -0.058 0.000 0.279
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.429 0.127 0.000
y 0.127 -30.875 0.000
z 0.000 0.000 -32.592
Traceless
 xyz
x 0.304 0.127 0.000
y 0.127 1.136 0.000
z 0.000 0.000 -1.440
Polar
3z2-r2-2.881
x2-y2-0.555
xy0.127
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.524 -0.387 0.000
y -0.387 8.209 0.000
z 0.000 0.000 7.846


<r2> (average value of r2) Å2
<r2> 97.601
(<r2>)1/2 9.879