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/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-194.226484
Energy at 298.15K-194.233785
HF Energy-193.446725
Nuclear repulsion energy163.940137
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/Def2TZVPP
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 3283 3123 6.22      
2 A1 3247 3089 2.79      
3 A1 3079 2930 31.89      
4 A1 1536 1461 0.32      
5 A1 1500 1427 4.97      
6 A1 1285 1223 0.09      
7 A1 1142 1087 2.01      
8 A1 1053 1002 0.04      
9 A1 934 888 1.12      
10 A1 821 781 0.01      
11 A2 3102 2951 0.00      
12 A2 1237 1177 0.00      
13 A2 1006 957 0.00      
14 A2 693 659 0.00      
15 A2 87 82 0.00      
16 B1 3121 2970 23.75      
17 B1 1159 1103 4.25      
18 B1 1025 975 3.87      
19 B1 821 781 6.64      
20 B1 639 608 73.60      
21 B1 465 443 2.84      
22 B2 3270 3111 6.94      
23 B2 3068 2920 23.70      
24 B2 1475 1404 1.48      
25 B2 1392 1325 10.74      
26 B2 1318 1254 0.47      
27 B2 1294 1231 4.17      
28 B2 1059 1007 0.25      
29 B2 911 867 22.14      
30 B2 726 691 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 22872.0 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 21762.7 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/Def2TZVPP
ABC
0.26613 0.25400 0.13645

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.158
C2 0.000 1.301 0.570
C3 0.000 -1.301 0.570
C4 0.000 0.810 -1.004
C5 0.000 -0.810 -1.004
H6 0.000 0.000 2.573
H7 0.000 2.322 0.912
H8 0.000 -2.322 0.912
H9 0.890 1.147 -1.533
H10 -0.890 1.147 -1.533
H11 0.890 -1.147 -1.533
H12 -0.890 -1.147 -1.533

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.42821.42822.30942.30941.41422.33532.33533.05823.05823.05823.0582
C21.42822.60261.64932.63342.38841.07663.63962.28862.28863.34823.3482
C31.42822.60262.63341.64932.38843.63961.07663.34823.34822.28862.2886
C42.30941.64932.63341.61943.66752.44103.67151.08861.08862.21392.2139
C52.30942.63341.64931.61943.66753.67152.44102.21392.21391.08861.0886
H61.41422.38842.38843.66753.66752.85512.85514.35494.35494.35494.3549
H72.33531.07663.63962.44103.67152.85514.64442.85452.85454.33664.3366
H82.33533.63961.07663.67152.44102.85514.64444.33664.33662.85452.8545
H93.05822.28863.34821.08862.21394.35492.85454.33661.77932.29492.9039
H103.05822.28863.34821.08862.21394.35492.85454.33661.77932.90392.2949
H113.05823.34822.28862.21391.08864.35494.33662.85452.29492.90391.7793
H123.05823.34822.28862.21391.08864.35494.33662.85452.90392.29491.7793

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 96.992 C1 C2 H7 137.162
C1 C3 C5 96.992 C1 C3 H8 137.162
C2 C1 C3 131.331 C2 C1 H6 114.335
C2 C4 C5 107.343 C2 C4 H9 111.784
C2 C4 H10 111.784 C3 C1 H6 114.335
C3 C5 C4 107.343 C3 C5 H11 111.784
C3 C5 H12 111.784 C4 C2 H7 125.846
C4 C5 H11 108.074 C4 C5 H12 108.074
C5 C3 H8 125.846 C5 C4 H9 108.074
C5 C4 H10 108.074 H9 C4 H10 109.618
H11 C5 H12 109.618
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability