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All results from a given calculation for C5H7 (cyclopentenyl radical)

using model chemistry: MP2/CEP-31G

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/CEP-31G
 hartrees
Energy at 0K-31.736896
Energy at 298.15K-31.744075
HF Energy-31.381490
Nuclear repulsion energy84.640205
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/CEP-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 A1 3241 3132 24.65      
2 A1 3180 3073 8.36      
3 A1 3039 2936 61.36      
4 A1 1526 1475 4.30      
5 A1 1495 1444 0.50      
6 A1 1301 1257 1.16      
7 A1 1120 1082 4.70      
8 A1 1042 1007 0.35      
9 A1 904 874 3.99      
10 A1 807 780 0.00      
11 A2 3080 2976 0.00      
12 A2 1241 1199 0.00      
13 A2 1032 997 0.00      
14 A2 606 586 0.00      
15 A2 95 91 0.00      
16 B1 3100 2995 97.95      
17 B1 1151 1112 5.71      
18 B1 967 935 12.85      
19 B1 835 807 0.34      
20 B1 613 592 103.75      
21 B1 420 406 15.24      
22 B2 3220 3112 24.81      
23 B2 3025 2923 49.77      
24 B2 1507 1457 0.95      
25 B2 1400 1353 7.73      
26 B2 1332 1287 0.75      
27 B2 1305 1261 4.54      
28 B2 1090 1053 0.68      
29 B2 905 874 15.71      
30 B2 716 692 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 22647.1 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 21883.9 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 MP2/CEP-31G
ABC
0.24839 0.24121 0.12842

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.304
C2 0.000 1.179 0.523
C3 0.000 -1.179 0.523
C4 0.000 0.794 -0.993
C5 0.000 -0.794 -0.993
H6 0.000 0.000 2.403
H7 0.000 2.258 0.723
H8 0.000 -2.258 0.723
H9 0.897 1.207 -1.509
H10 -0.897 1.207 -1.509
H11 0.897 -1.207 -1.509
H12 -0.897 -1.207 -1.509

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.41441.41442.43082.43081.09902.33152.33153.19013.19013.19013.1901
C21.41442.35801.56442.48812.21941.09733.44272.22152.22153.25973.2597
C31.41442.35802.48811.56442.21943.44271.09733.25973.25972.22152.2215
C42.43081.56442.48811.58753.48812.25603.50121.11391.11392.25202.2520
C52.43082.48811.56441.58753.48813.50122.25602.25202.25201.11391.1139
H61.09902.21942.21943.48813.48812.81452.81454.19154.19154.19154.1915
H72.33151.09733.44272.25603.50122.81454.51582.62542.62544.21784.2178
H82.33153.44271.09733.50122.25602.81454.51584.21784.21782.62542.6254
H93.19012.22153.25971.11392.25204.19152.62544.21781.79312.41323.0064
H103.19012.22153.25971.11392.25204.19152.62544.21781.79313.00642.4132
H113.19013.25972.22152.25201.11394.19154.21782.62542.41323.00641.7931
H123.19013.25972.22152.25201.11394.19154.21782.62543.00642.41321.7931

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 109.278 C1 C2 H7 135.961
C1 C3 C5 109.278 C1 C3 H8 135.961
C2 C1 C3 112.931 C2 C1 H6 123.535
C2 C4 C5 104.257 C2 C4 H9 110.968
C2 C4 H10 110.968 C3 C1 H6 123.535
C3 C5 C4 104.257 C3 C5 H11 110.968
C3 C5 H12 110.968 C4 C2 H7 114.761
C4 C5 H11 111.755 C4 C5 H12 111.755
C5 C3 H8 114.761 C5 C4 H9 111.755
C5 C4 H10 111.755 H9 C4 H10 107.204
H11 C5 H12 107.204
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability