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

using model chemistry: MP2/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 MP2/CEP-121G
 hartrees
Energy at 0K-31.791453
Energy at 298.15K-31.798528
HF Energy-31.394957
Nuclear repulsion energy85.262835
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-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 3204 3127 19.83      
2 A1 3153 3078 10.02      
3 A1 2976 2905 52.67      
4 A1 1527 1490 4.03      
5 A1 1488 1452 0.99      
6 A1 1296 1265 0.74      
7 A1 1121 1094 4.13      
8 A1 1037 1012 0.40      
9 A1 900 878 3.73      
10 A1 816 796 0.01      
11 A2 3006 2934 0.00      
12 A2 1217 1188 0.00      
13 A2 1029 1005 0.00      
14 A2 560 547 0.00      
15 A2 70 68 0.00      
16 B1 3031 2958 71.60      
17 B1 1140 1113 6.09      
18 B1 874 853 17.71      
19 B1 809 790 0.64      
20 B1 583 569 75.69      
21 B1 392 383 15.51      
22 B2 3187 3111 19.17      
23 B2 2960 2889 47.25      
24 B2 1508 1472 0.75      
25 B2 1390 1356 9.26      
26 B2 1338 1306 0.50      
27 B2 1284 1253 2.26      
28 B2 1082 1056 0.56      
29 B2 896 874 14.72      
30 B2 721 703 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 22296.7 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 21761.5 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-121G
ABC
0.25238 0.24456 0.13034

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.292
C2 0.000 1.167 0.521
C3 0.000 -1.167 0.521
C4 0.000 0.791 -0.987
C5 0.000 -0.791 -0.987
H6 0.000 0.000 2.384
H7 0.000 2.237 0.730
H8 0.000 -2.237 0.730
H9 0.890 1.201 -1.500
H10 -0.890 1.201 -1.500
H11 0.890 -1.201 -1.500
H12 -0.890 -1.201 -1.500

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.39911.39912.41242.41241.09242.30632.30633.16743.16743.16743.1674
C21.39912.33461.55412.47122.19901.08993.41052.20882.20883.23813.2381
C31.39912.33462.47121.55412.19903.41051.08993.23813.23812.20882.2088
C42.41241.55412.47121.58133.46292.24513.48061.10641.10642.24092.2409
C52.41242.47121.55411.58133.46293.48062.24512.24092.24091.10641.1064
H61.09242.19902.19903.46293.46292.78202.78204.16254.16254.16254.1625
H72.30631.08993.41052.24513.48062.78204.47362.61582.61584.19354.1935
H82.30633.41051.08993.48062.24512.78204.47364.19354.19352.61582.6158
H93.16742.20883.23811.10642.24094.16252.61584.19351.78042.40152.9894
H103.16742.20883.23811.10642.24094.16252.61584.19351.78042.98942.4015
H113.16743.23812.20882.24091.10644.16254.19352.61582.40152.98941.7804
H123.16743.23812.20882.24091.10644.16254.19352.61582.98942.40151.7804

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 109.431 C1 C2 H7 135.459
C1 C3 C5 109.431 C1 C3 H8 135.459
C2 C1 C3 113.090 C2 C1 H6 123.455
C2 C4 C5 104.024 C2 C4 H9 111.124
C2 C4 H10 111.124 C3 C1 H6 123.455
C3 C5 C4 104.024 C3 C5 H11 111.124
C3 C5 H12 111.124 C4 C2 H7 115.110
C4 C5 H11 111.754 C4 C5 H12 111.754
C5 C3 H8 115.110 C5 C4 H9 111.754
C5 C4 H10 111.754 H9 C4 H10 107.135
H11 C5 H12 107.135
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability