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All results from a given calculation for C5H8 (Cyclopentene)

using model chemistry: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-195.217210
Energy at 298.15K-195.225987
Nuclear repulsion energy169.636753
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/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' 3127 3103 32.94      
2 A' 3031 3008 45.10      
3 A' 2992 2969 60.83      
4 A' 2971 2948 8.54      
5 A' 2929 2906 36.47      
6 A' 1636 1623 2.29      
7 A' 1482 1471 0.37      
8 A' 1459 1448 0.45      
9 A' 1291 1281 0.08      
10 A' 1197 1188 1.20      
11 A' 1105 1097 0.07      
12 A' 1042 1034 3.99      
13 A' 946 938 0.37      
14 A' 873 866 0.32      
15 A' 797 791 0.29      
16 A' 694 689 21.08      
17 A' 601 597 9.89      
18 A' 131 130 0.20      
19 A" 3103 3079 10.17      
20 A" 2976 2953 38.10      
21 A" 2929 2906 60.47      
22 A" 1463 1452 0.03      
23 A" 1348 1338 0.19      
24 A" 1284 1274 0.17      
25 A" 1273 1263 1.60      
26 A" 1193 1183 0.16      
27 A" 1118 1109 1.11      
28 A" 1003 995 1.54      
29 A" 933 926 0.15      
30 A" 894 887 4.53      
31 A" 867 860 2.99      
32 A" 758 752 0.18      
33 A" 378 375 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 24910.6 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 24718.8 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/6-31G**
ABC
0.23969 0.23661 0.12884

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.250 -1.220 0.000
C2 -0.064 -0.327 1.247
C3 -0.064 -0.327 -1.247
C4 -0.064 1.082 0.673
C5 -0.064 1.082 -0.673
H6 1.320 -1.482 0.000
H7 -0.316 -2.164 0.000
H8 -1.052 -0.567 1.688
H9 -1.052 -0.567 -1.688
H10 -0.101 1.976 1.302
H11 -0.101 1.976 -1.302
H12 0.672 -0.462 -2.058
H13 0.672 -0.462 2.058

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56551.56552.41882.41881.10201.10062.22942.22943.46833.46832.23342.2334
C21.56552.49381.52152.38142.19242.23441.10783.10602.30373.43493.38891.1042
C31.56552.49382.38141.52152.19242.23443.10601.10783.43492.30371.10423.3889
C42.41881.52152.38141.34572.99123.32462.17383.04461.09332.16753.22292.2017
C52.41882.38141.52151.34572.99123.32463.04462.17382.16751.09332.20173.2229
H61.10202.19242.19242.99122.99121.77223.05183.05183.95903.95902.38662.3866
H71.10062.23442.23443.32463.32461.77222.43752.43754.34494.34492.84742.8474
H82.22941.10783.10602.17383.04463.05182.43753.37642.74224.03844.12531.7664
H92.22943.10601.10783.04462.17383.05182.43753.37644.03842.74221.76644.1253
H103.46832.30373.43491.09332.16753.95904.34492.74224.03842.60314.22262.6675
H113.46833.43492.30372.16751.09333.95904.34494.03842.74222.60312.66754.2226
H122.23343.38891.10423.22292.20172.38662.84744.12531.76644.22262.66754.1163
H132.23341.10423.38892.20173.22292.38662.84741.76644.12532.66754.22264.1163

picture of Cyclopentene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 103.165 C1 C2 H8 111.873
C1 C2 H13 112.413 C1 C3 C5 103.165
C1 C3 H9 111.873 C1 C3 H12 112.413
C2 C1 C3 105.591 C2 C1 H6 109.321
C2 C1 H7 112.713 C2 C4 C5 112.164
C2 C4 H10 122.691 C3 C1 H6 109.321
C3 C1 H7 112.713 C3 C5 C4 112.164
C3 C5 H11 122.691 C4 C2 H8 110.550
C4 C2 H13 113.007 C4 C5 H11 125.102
C5 C3 H9 110.550 C5 C3 H12 113.007
C5 C4 H10 125.102 H6 C1 H7 107.140
H8 C2 H13 105.981 H9 C3 H12 105.981
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.171      
2 C -0.183      
3 C -0.183      
4 C -0.040      
5 C -0.040      
6 H 0.090      
7 H 0.077      
8 H 0.089      
9 H 0.089      
10 H 0.053      
11 H 0.053      
12 H 0.083      
13 H 0.083      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.038 -0.166 0.000 0.171
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.225 -0.035 0.000
y -0.035 -31.081 0.000
z 0.000 0.000 -30.537
Traceless
 xyz
x -1.416 -0.035 0.000
y -0.035 0.299 0.000
z 0.000 0.000 1.116
Polar
3z2-r22.232
x2-y2-1.143
xy-0.035
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 106.663
(<r2>)1/2 10.328