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

using model chemistry: QCISD/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 QCISD/6-31G
 hartrees
Energy at 0K-193.113850
Energy at 298.15K-193.120121
HF Energy-192.616559
Nuclear repulsion energy157.457734
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 QCISD/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 3230 3112 5.05      
2 A 3213 3096 38.80      
3 A 3191 3075 10.29      
4 A 3101 2988 22.78      
5 A 1560 1503 3.28      
6 A 1519 1464 1.06      
7 A 1301 1254 0.32      
8 A 1189 1146 2.24      
9 A 1117 1076 2.21      
10 A 1038 1001 0.78      
11 A 958 923 2.89      
12 A 918 884 3.50      
13 A 791 762 2.18      
14 A 745 718 65.36      
15 A 437 421 5.46      
16 A 3213 3096 12.31      
17 A 3180 3065 9.16      
18 A 1324 1276 19.22      
19 A 1259 1213 0.01      
20 A 1153 1111 3.28      
21 A 1104 1064 10.25      
22 A 1068 1030 0.32      
23 A 917 884 6.51      
24 A 867 835 4.86      
25 A 833 803 0.26      
26 A 773 745 22.39      
27 A 459 443 1.89      

Unscaled Zero Point Vibrational Energy (zpe) 20228.6 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 19492.3 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 QCISD/6-31G
ABC
0.35007 0.21003 0.16763

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.272 1.076 0.685
C2 -0.272 1.076 -0.685
C3 -0.272 -0.472 0.780
C4 -0.272 -0.472 -0.780
C5 0.939 -1.030 0.000
H6 -0.134 1.850 1.440
H7 -0.134 1.850 -1.440
H8 -0.883 -1.085 1.439
H9 -0.883 -1.085 -1.439
H10 1.880 -0.475 0.000
H11 1.054 -2.119 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.36961.55082.13142.52371.09022.26562.36843.09052.73993.5262
C21.36962.13141.55082.52372.26561.09023.09052.36842.73993.5262
C31.55082.13141.56091.54472.41773.21571.08742.38232.28952.2539
C42.13141.55081.56091.54473.21572.41772.38231.08742.28952.2539
C52.52372.52371.54471.54473.39373.39372.32242.32241.09281.0952
H61.09022.26562.41773.21573.39372.88003.02844.17863.39664.3860
H72.26561.09023.21572.41773.39372.88004.17863.02843.39664.3860
H82.36843.09051.08742.38232.32243.02844.17862.87833.17482.6257
H93.09052.36842.38231.08742.32244.17863.02842.87833.17482.6257
H102.73992.73992.28952.28951.09283.39663.39663.17483.17481.8399
H113.52623.52622.25392.25391.09524.38604.38602.62572.62571.8399

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 93.536 C1 C2 H7 133.847
C1 C3 C4 86.464 C1 C3 C5 109.226
C1 C3 H8 126.831 C2 C1 C3 93.536
C2 C1 H6 133.847 C2 C4 C3 86.464
C2 C4 C5 109.226 C2 C4 H9 126.831
C3 C1 H6 131.753 C3 C4 C5 59.654
C3 C4 H9 127.282 C3 C5 C4 60.692
C3 C5 H10 119.471 C3 C5 H11 116.208
C4 C2 H7 131.753 C4 C3 C5 59.654
C4 C3 H8 127.282 C4 C5 H10 119.471
C4 C5 H11 116.208 C5 C3 H8 122.901
C5 C4 H9 122.901 H10 C5 H11 114.464
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability