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 (Cyclopentene)

using model chemistry: BLYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/STO-3G
 hartrees
Energy at 0K-192.842156
Energy at 298.15K-192.850580
Nuclear repulsion energy167.290811
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 BLYP/STO-3G
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' 3376 3123 1.07      
2 A' 3359 3108 4.57      
3 A' 3303 3056 6.47      
4 A' 3253 3010 4.85      
5 A' 3210 2970 0.15      
6 A' 1760 1628 0.68      
7 A' 1638 1516 0.50      
8 A' 1618 1497 0.20      
9 A' 1405 1300 0.16      
10 A' 1285 1189 0.15      
11 A' 1164 1077 0.19      
12 A' 1114 1030 0.76      
13 A' 1011 936 0.11      
14 A' 929 859 0.06      
15 A' 810 750 0.05      
16 A' 712 658 2.83      
17 A' 686 635 21.72      
18 A' 35 33 0.13      
19 A" 3343 3093 6.52      
20 A" 3302 3055 0.03      
21 A" 3209 2969 10.74      
22 A" 1624 1502 0.00      
23 A" 1448 1340 0.38      
24 A" 1370 1268 1.63      
25 A" 1347 1247 1.95      
26 A" 1326 1226 0.45      
27 A" 1209 1119 0.02      
28 A" 1100 1018 0.39      
29 A" 975 902 0.00      
30 A" 949 878 2.97      
31 A" 943 872 0.54      
32 A" 797 738 0.10      
33 A" 371 343 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26990.3 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 24971.4 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 BLYP/STO-3G
ABC
0.23197 0.23108 0.12406

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.043 -1.272 0.000
C2 -0.011 -0.320 1.273
C3 -0.011 -0.320 -1.273
C4 -0.011 1.107 0.675
C5 -0.011 1.107 -0.675
H6 0.980 -1.867 0.000
H7 -0.808 -1.984 0.000
H8 -0.927 -0.502 1.881
H9 -0.927 -0.502 -1.881
H10 -0.017 2.005 1.320
H11 -0.017 2.005 -1.320
H12 0.863 -0.482 -1.945
H13 0.863 -0.482 1.945

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.59021.59022.47322.47321.10991.10982.25242.25243.53333.53332.25322.2532
C21.59022.54551.54712.41462.23522.24131.11453.28922.32553.48283.33791.1141
C31.59022.54552.41461.54712.23522.24133.28921.11453.48282.32551.11413.3379
C42.47321.54712.41461.35003.20683.26252.20943.15601.10592.18813.18602.2136
C52.47322.41461.54711.35003.20683.26253.15602.20942.18811.10592.21363.1860
H61.10992.23522.23523.20683.20681.79173.00683.00684.21084.21082.39052.3905
H71.10982.24132.24133.26253.26251.79172.39792.39794.27564.27562.97132.9713
H82.25241.11453.28922.20943.15603.00682.39793.76222.72524.16674.22381.7911
H92.25243.28921.11453.15602.20943.00682.39793.76224.16672.72521.79114.2238
H103.53332.32553.48281.10592.18814.21084.27562.72524.16672.64064.19742.7107
H113.53333.48282.32552.18811.10594.21084.27564.16672.72522.64062.71074.1974
H122.25323.33791.11413.18602.21362.39052.97134.22381.79114.19742.71073.8893
H132.25321.11413.33792.21363.18602.39052.97131.79114.22382.71074.19743.8893

picture of Cyclopentene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 104.052 C1 C2 H8 111.560
C1 C2 H13 111.646 C1 C3 C5 104.052
C1 C3 H9 111.560 C1 C3 H12 111.646
C2 C1 C3 106.333 C2 C1 H6 110.485
C2 C1 H7 110.966 C2 C4 C5 112.728
C2 C4 H10 121.573 C3 C1 H6 110.485
C3 C1 H7 110.966 C3 C5 C4 112.728
C3 C5 H11 121.573 C4 C2 H8 111.174
C4 C2 H13 111.531 C4 C5 H11 125.698
C5 C3 H9 111.174 C5 C3 H12 111.531
C5 C4 H10 125.698 H6 C1 H7 107.638
H8 C2 H13 106.967 H9 C3 H12 106.967
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.128      
2 C -0.133      
3 C -0.133      
4 C -0.083      
5 C -0.083      
6 H 0.069      
7 H 0.069      
8 H 0.071      
9 H 0.071      
10 H 0.070      
11 H 0.070      
12 H 0.071      
13 H 0.071      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.007 -0.198 0.000 0.198
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.832 0.003 0.000
y 0.003 -28.999 0.000
z 0.000 0.000 -28.547
Traceless
 xyz
x -1.059 0.003 0.000
y 0.003 0.190 0.000
z 0.000 0.000 0.869
Polar
3z2-r21.737
x2-y2-0.832
xy0.003
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.725 -0.006 0.000
y -0.006 4.235 0.000
z 0.000 0.000 5.395


<r2> (average value of r2) Å2
<r2> 108.128
(<r2>)1/2 10.398