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

using model chemistry: QCISD/6-311G*

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/6-311G*
 hartrees
Energy at 0K-193.457846
Energy at 298.15K-193.464128
HF Energy-192.742076
Nuclear repulsion energy159.645088
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/6-311G*
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 3221 3084 4.22      
2 A 3213 3076 49.62      
3 A 3202 3065 2.40      
4 A 3111 2978 27.64      
5 A 1596 1528 3.99      
6 A 1506 1442 2.37      
7 A 1325 1269 0.50      
8 A 1220 1168 1.05      
9 A 1120 1072 1.75      
10 A 1045 1001 1.48      
11 A 974 932 3.78      
12 A 887 849 2.94      
13 A 820 785 0.11      
14 A 741 709 70.88      
15 A 429 411 7.45      
16 A 3205 3068 18.71      
17 A 3184 3049 6.86      
18 A 1332 1275 21.98      
19 A 1234 1182 0.40      
20 A 1105 1058 6.47      
21 A 1065 1019 5.90      
22 A 1059 1013 2.03      
23 A 955 915 1.37      
24 A 878 841 9.19      
25 A 828 793 6.07      
26 A 798 764 28.48      
27 A 457 438 1.47      

Unscaled Zero Point Vibrational Energy (zpe) 20254.4 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 19391.6 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/6-311G*
ABC
0.36018 0.21590 0.17304

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.268 1.059 0.676
C2 -0.268 1.059 -0.676
C3 -0.268 -0.465 0.764
C4 -0.268 -0.465 -0.764
C5 0.927 -1.011 0.000
H6 -0.125 1.831 1.429
H7 -0.125 1.831 -1.429
H8 -0.885 -1.089 1.404
H9 -0.885 -1.089 -1.404
H10 1.863 -0.453 0.000
H11 1.035 -2.097 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.35161.52612.09652.48421.08782.24622.35013.05262.69903.4808
C21.35162.09651.52612.48422.24621.08783.05262.35012.69903.4808
C31.52612.09651.52881.52082.39393.17791.08582.33912.26412.2246
C42.09651.52611.52881.52083.17792.39392.33911.08582.26412.2246
C52.48422.48421.52081.52083.35023.35022.29392.29391.08901.0914
H61.08782.24622.39393.17793.35022.85743.01714.13843.34784.3376
H72.24621.08783.17792.39393.35022.85744.13843.01713.34784.3376
H82.35013.05261.08582.33912.29393.01714.13842.80783.15042.5837
H93.05262.35012.33911.08582.29394.13843.01712.80783.15042.5837
H102.69902.69902.26412.26411.08903.34783.34783.15043.15041.8403
H113.48083.48082.22462.22461.09144.33764.33762.58372.58371.8403

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 93.327 C1 C2 H7 133.799
C1 C3 C4 86.673 C1 C3 C5 109.236
C1 C3 H8 127.455 C2 C1 C3 93.327
C2 C1 H6 133.799 C2 C4 C3 86.673
C2 C4 C5 109.236 C2 C4 H9 127.455
C3 C1 H6 131.931 C3 C4 C5 59.826
C3 C4 H9 126.087 C3 C5 C4 60.347
C3 C5 H10 119.427 C3 C5 H11 115.802
C4 C2 H7 131.931 C4 C3 C5 59.826
C4 C3 H8 126.087 C4 C5 H10 119.427
C4 C5 H11 115.802 C5 C3 H8 122.418
C5 C4 H9 122.418 H10 C5 H11 115.136
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability