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 C5H6 (Bicyclo[2.1.0]pent-2-ene)

using model chemistry: PBEPBE/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 PBEPBE/6-31+G**
 hartrees
Energy at 0K-193.783997
Energy at 298.15K-193.790102
Nuclear repulsion energy159.321691
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/6-31+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 3153 3117 2.86      
2 A 3145 3110 49.73      
3 A 3130 3095 3.76      
4 A 3037 3003 35.24      
5 A 1557 1539 8.55      
6 A 1428 1412 2.99      
7 A 1261 1247 1.59      
8 A 1173 1159 1.23      
9 A 1083 1070 2.18      
10 A 1011 1000 2.22      
11 A 941 930 4.95      
12 A 843 833 2.63      
13 A 784 775 0.40      
14 A 711 703 78.19      
15 A 407 402 7.73      
16 A 3139 3103 20.13      
17 A 3117 3081 7.65      
18 A 1275 1261 23.63      
19 A 1180 1167 0.04      
20 A 1042 1030 6.07      
21 A 1006 995 0.28      
22 A 998 986 8.11      
23 A 926 916 1.24      
24 A 851 841 8.79      
25 A 797 788 7.13      
26 A 768 759 30.76      
27 A 437 432 0.83      

Unscaled Zero Point Vibrational Energy (zpe) 19600.3 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 19376.9 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/6-31+G**
ABC
0.35827 0.21539 0.17256

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.270 1.058 0.679
C2 -0.270 1.058 -0.679
C3 -0.270 -0.462 0.765
C4 -0.270 -0.462 -0.765
C5 0.931 -1.013 0.000
H6 -0.123 1.833 1.438
H7 -0.123 1.833 -1.438
H8 -0.888 -1.093 1.407
H9 -0.888 -1.093 -1.407
H10 1.871 -0.450 0.000
H11 1.041 -2.106 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.35731.52242.09602.48841.09442.25842.35413.05962.70543.4917
C21.35732.09601.52242.48842.25841.09443.05962.35412.70543.4917
C31.52242.09601.52911.52632.39583.18381.09252.34442.27362.2377
C42.09601.52241.52911.52633.18382.39582.34441.09252.27362.2377
C52.48842.48841.52631.52633.35793.35792.30072.30071.09661.0984
H61.09442.25842.39583.18383.35792.87523.02484.15213.35454.3516
H72.25841.09443.18382.39583.35792.87524.15213.02483.35454.3516
H82.35413.05961.09252.34442.30073.02484.15212.81373.16352.5937
H93.05962.35412.34441.09252.30074.15213.02482.81373.16352.5937
H102.70542.70542.27362.27361.09663.35453.35453.16353.16351.8527
H113.49173.49172.23772.23771.09844.35164.35162.59372.59371.8527

picture of Bicyclo[2.1.0]pent-2-ene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 93.235 C1 C2 H7 133.906
C1 C3 C4 86.765 C1 C3 C5 109.416
C1 C3 H8 127.616 C2 C1 C3 93.235
C2 C1 H6 133.906 C2 C4 C3 86.765
C2 C4 C5 109.416 C2 C4 H9 127.616
C3 C1 H6 131.877 C3 C4 C5 59.939
C3 C4 H9 126.008 C3 C5 C4 60.122
C3 C5 H10 119.281 C3 C5 H11 116.021
C4 C2 H7 131.877 C4 C3 C5 59.939
C4 C3 H8 126.008 C4 C5 H10 119.281
C4 C5 H11 116.021 C5 C3 H8 122.050
C5 C4 H9 122.050 H10 C5 H11 115.134
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.147      
2 C -0.147      
3 C -0.114      
4 C -0.114      
5 C -0.400      
6 H 0.136      
7 H 0.136      
8 H 0.158      
9 H 0.158      
10 H 0.171      
11 H 0.163      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.187 -0.506 0.000 0.539
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.100 0.858 0.000
y 0.858 -28.915 0.000
z 0.000 0.000 -30.252
Traceless
 xyz
x -2.517 0.858 0.000
y 0.858 2.262 0.000
z 0.000 0.000 0.255
Polar
3z2-r20.510
x2-y2-3.186
xy0.858
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.222 -0.573 0.000
y -0.573 9.044 0.000
z 0.000 0.000 8.507


<r2> (average value of r2) Å2
<r2> 88.676
(<r2>)1/2 9.417