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All results from a given calculation for C5H6 (Bicyclo[2.1.0]pent-2-ene)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-193.401510
Energy at 298.15K-193.407835
HF Energy-192.720265
Nuclear repulsion energy160.555150
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 MP2/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3307 3097 6.53      
2 A 3298 3088 34.82      
3 A 3293 3084 3.73      
4 A 3193 2990 22.53      
5 A 1597 1495 3.97      
6 A 1529 1432 0.70      
7 A 1343 1258 0.74      
8 A 1238 1159 1.43      
9 A 1147 1074 1.33      
10 A 1072 1004 2.21      
11 A 994 930 2.89      
12 A 896 839 3.26      
13 A 841 788 0.05      
14 A 752 704 57.89      
15 A 429 402 5.65      
16 A 3293 3084 11.54      
17 A 3267 3059 7.19      
18 A 1360 1274 18.59      
19 A 1262 1182 0.09      
20 A 1124 1053 4.60      
21 A 1088 1019 4.87      
22 A 1071 1003 0.98      
23 A 983 921 1.63      
24 A 883 827 11.10      
25 A 832 779 13.20      
26 A 807 755 13.94      
27 A 457 428 1.96      

Unscaled Zero Point Vibrational Energy (zpe) 20676.9 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 19363.9 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 MP2/6-31G**
ABC
0.36253 0.21917 0.17538

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.269 1.050 0.677
C2 -0.269 1.050 -0.677
C3 -0.269 -0.460 0.760
C4 -0.269 -0.460 -0.760
C5 0.923 -1.002 0.000
H6 -0.105 1.815 1.423
H7 -0.105 1.815 -1.423
H8 -0.879 -1.087 1.393
H9 -0.879 -1.087 -1.393
H10 1.849 -0.440 0.000
H11 1.037 -2.081 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.35361.51182.08412.46721.08182.24112.33413.03632.67603.4591
C21.35362.08411.51182.46722.24111.08183.03632.33412.67603.4591
C31.51182.08411.52031.51392.37563.15761.07952.32402.25012.2162
C42.08411.51181.52031.51393.15762.37562.32401.07952.25012.2162
C52.46722.46721.51391.51393.31953.31952.27912.27911.08321.0854
H61.08182.24112.37563.15763.31952.84593.00364.11713.30574.3027
H72.24111.08183.15762.37563.31952.84594.11713.00363.30574.3027
H82.33413.03631.07952.32402.27913.00364.11712.78593.13052.5692
H93.03632.33412.32401.07952.27914.11713.00362.78593.13052.5692
H102.67602.67602.25012.25011.08323.30573.30573.13053.13051.8314
H113.45913.45912.21622.21621.08544.30274.30272.56922.56921.8314

picture of Bicyclo[2.1.0]pent-2-ene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 93.160 C1 C2 H7 133.609
C1 C3 C4 86.840 C1 C3 C5 109.258
C1 C3 H8 127.723 C2 C1 C3 93.160
C2 C1 H6 133.609 C2 C4 C3 86.840
C2 C4 C5 109.258 C2 C4 H9 127.723
C3 C1 H6 131.982 C3 C4 C5 59.860
C3 C4 H9 125.885 C3 C5 C4 60.281
C3 C5 H10 119.150 C3 C5 H11 116.022
C4 C2 H7 131.982 C4 C3 C5 59.860
C4 C3 H8 125.885 C4 C5 H10 119.150
C4 C5 H11 116.022 C5 C3 H8 122.105
C5 C4 H9 122.105 H10 C5 H11 115.235
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability