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 C5H7 (cyclopentenyl radical)

using model chemistry: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-31.397092
Energy at 298.15K-31.404532
HF Energy-31.397092
Nuclear repulsion energy86.175709
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 HF/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3362 3068 26.67      
2 A1 3320 3030 9.55      
3 A1 3157 2881 75.90      
4 A1 1643 1499 5.30      
5 A1 1549 1413 0.05      
6 A1 1400 1277 0.50      
7 A1 1163 1061 1.37      
8 A1 1088 993 2.10      
9 A1 959 875 2.45      
10 A1 861 786 0.01      
11 A2 3170 2892 0.00      
12 A2 1350 1232 0.00      
13 A2 1100 1003 0.00      
14 A2 620 566 0.00      
15 A2 122 111 0.00      
16 B1 3197 2917 109.43      
17 B1 1238 1130 3.41      
18 B1 985 899 10.51      
19 B1 879 802 0.94      
20 B1 615 561 84.19      
21 B1 422 385 9.49      
22 B2 3345 3052 35.39      
23 B2 3135 2861 62.38      
24 B2 1622 1480 0.81      
25 B2 1512 1379 4.38      
26 B2 1438 1312 0.49      
27 B2 1416 1292 2.02      
28 B2 1158 1057 1.06      
29 B2 963 879 8.85      
30 B2 775 708 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 23781.0 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 21700.1 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 HF/CEP-121G
ABC
0.25726 0.24970 0.13284

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.287
C2 0.000 1.161 0.511
C3 0.000 -1.161 0.511
C4 0.000 0.778 -0.975
C5 0.000 -0.778 -0.975
H6 0.000 0.000 2.363
H7 0.000 2.216 0.713
H8 0.000 -2.216 0.713
H9 0.872 1.184 -1.484
H10 -0.872 1.184 -1.484
H11 0.872 -1.184 -1.484
H12 -0.872 -1.184 -1.484

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.39741.39742.39282.39281.07582.28972.28973.13763.13763.13763.1376
C21.39742.32301.53462.44332.18671.07433.38412.17732.17733.20023.2002
C31.39742.32302.44331.53462.18673.38411.07433.20023.20022.17732.1773
C42.39281.53462.44331.55613.42812.21823.43781.08841.08842.20662.2066
C52.39282.44331.53461.55613.42813.43782.21822.20662.20661.08841.0884
H61.07582.18672.18673.42813.42812.76322.76324.11894.11894.11894.1189
H72.28971.07433.38412.21823.43782.76324.43302.57992.57994.14164.1416
H82.28973.38411.07433.43782.21822.76324.43304.14164.14162.57992.5799
H93.13762.17733.20021.08842.20664.11892.57994.14161.74462.36792.9412
H103.13762.17733.20021.08842.20664.11892.57994.14161.74462.94122.3679
H113.13763.20022.17732.20661.08844.11894.14162.57992.36792.94121.7446
H123.13763.20022.17732.20661.08844.11894.14162.57992.94122.36791.7446

picture of cyclopentenyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 109.307 C1 C2 H7 135.349
C1 C3 C5 109.307 C1 C3 H8 135.349
C2 C1 C3 112.446 C2 C1 H6 123.777
C2 C4 C5 104.470 C2 C4 H9 111.070
C2 C4 H10 111.070 C3 C1 H6 123.777
C3 C5 C4 104.470 C3 C5 H11 111.070
C3 C5 H12 111.070 C4 C2 H7 115.344
C4 C5 H11 111.899 C4 C5 H12 111.899
C5 C3 H8 115.344 C5 C4 H9 111.899
C5 C4 H10 111.899 H9 C4 H10 106.536
H11 C5 H12 106.536
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.065      
2 C -0.176      
3 C -0.176      
4 C -0.357      
5 C -0.357      
6 H 0.192      
7 H 0.186      
8 H 0.186      
9 H 0.142      
10 H 0.142      
11 H 0.142      
12 H 0.142      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.315 0.315
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.315 0.000 0.000
y 0.000 -29.391 0.000
z 0.000 0.000 -30.746
Traceless
 xyz
x -3.246 0.000 0.000
y 0.000 2.640 0.000
z 0.000 0.000 0.607
Polar
3z2-r21.213
x2-y2-3.924
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.119 0.000 0.000
y 0.000 8.362 0.000
z 0.000 0.000 7.722


<r2> (average value of r2) Å2
<r2> 85.308
(<r2>)1/2 9.236