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: MP2/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at MP2/cc-pVDZ
 hartrees
Energy at 0K-194.024734
Energy at 298.15K-194.031942
HF Energy-193.385129
Nuclear repulsion energy162.883336
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 MP2/cc-pVDZ
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 3290 3134 7.27      
2 A1 3237 3083 7.82      
3 A1 3076 2930 32.55      
4 A1 1540 1467 0.09      
5 A1 1483 1413 4.15      
6 A1 1298 1236 0.29      
7 A1 1121 1068 3.67      
8 A1 1064 1013 0.08      
9 A1 941 896 3.10      
10 A1 819 780 0.20      
11 A2 3104 2957 0.00      
12 A2 1231 1172 0.00      
13 A2 997 950 0.00      
14 A2 644 613 0.00      
15 A2 70 67 0.00      
16 B1 3123 2974 36.24      
17 B1 1148 1094 3.67      
18 B1 1002 955 4.43      
19 B1 813 774 3.76      
20 B1 633 603 52.93      
21 B1 424 404 7.98      
22 B2 3277 3122 4.17      
23 B2 3063 2918 31.69      
24 B2 1457 1388 0.70      
25 B2 1400 1333 6.23      
26 B2 1317 1254 1.31      
27 B2 1296 1234 3.88      
28 B2 1063 1013 0.42      
29 B2 921 877 17.46      
30 B2 723 689 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 22788.7 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 21706.2 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 MP2/cc-pVDZ
ABC
0.26044 0.25339 0.13491

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.269
C2 0.000 1.147 0.507
C3 0.000 -1.147 0.507
C4 0.000 0.774 -0.966
C5 0.000 -0.774 -0.966
H6 0.000 0.000 2.365
H7 0.000 2.216 0.728
H8 0.000 -2.216 0.728
H9 0.884 1.191 -1.483
H10 -0.884 1.191 -1.483
H11 0.884 -1.191 -1.483
H12 -0.884 -1.191 -1.483

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.37761.37762.36502.36501.09542.28112.28113.12633.12633.12633.1263
C21.37762.29471.51912.42032.18361.09133.37062.17752.17753.19513.1951
C31.37762.29472.42031.51912.18363.37061.09133.19513.19512.17752.1775
C42.36501.51912.42031.54713.41902.22463.43591.10621.10622.21582.2158
C52.36502.42031.51911.54713.41903.43592.22462.21582.21581.10621.1062
H61.09542.18362.18363.41903.41902.75492.75494.12344.12344.12344.1234
H72.28111.09133.37062.22463.43592.75494.43192.59192.59194.15674.1567
H82.28113.37061.09133.43592.22462.75494.43194.15674.15672.59192.5919
H93.12632.17753.19511.10622.21584.12342.59194.15671.76842.38272.9672
H103.12632.17753.19511.10622.21584.12342.59194.15671.76842.96722.3827
H113.12633.19512.17752.21581.10624.12344.15672.59192.38272.96721.7684
H123.12633.19512.17752.21581.10624.12344.15672.59192.96722.38271.7684

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 109.363 C1 C2 H7 134.698
C1 C3 C5 109.363 C1 C3 H8 134.698
C2 C1 C3 112.785 C2 C1 H6 123.607
C2 C4 C5 104.244 C2 C4 H9 111.102
C2 C4 H10 111.102 C3 C1 H6 123.607
C3 C5 C4 104.244 C3 C5 H11 111.102
C3 C5 H12 111.102 C4 C2 H7 115.938
C4 C5 H11 112.191 C4 C5 H12 112.191
C5 C3 H8 115.938 C5 C4 H9 112.191
C5 C4 H10 112.191 H9 C4 H10 106.134
H11 C5 H12 106.134
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability