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 C6H8 (Bicyclo[2.2.0]hex-1(4)-ene)

using model chemistry: QCISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-231.010884
Energy at 298.15K-231.019119
HF Energy-230.409990
Nuclear repulsion energy214.902100
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/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3071 2951 0.00      
2 Ag 1709 1643 0.00      
3 Ag 1543 1483 0.00      
4 Ag 1211 1164 0.00      
5 Ag 808 776 0.00      
6 Ag 597 574 0.00      
7 Au 3115 2994 0.00      
8 Au 1159 1114 0.00      
9 Au 994 955 0.00      
10 Au 211 203 0.00      
11 B1g 3060 2941 0.00      
12 B1g 1529 1469 0.00      
13 B1g 1239 1191 0.00      
14 B1g 1076 1034 0.00      
15 B1g 805 774 0.00      
16 B1u 3132 3010 74.78      
17 B1u 1116 1072 0.64      
18 B1u 820 788 0.43      
19 B1u 151 146 16.32      
20 B2g 3132 3010 0.00      
21 B2g 1073 1031 0.00      
22 B2g 758 729 0.00      
23 B2u 3061 2942 56.45      
24 B2u 1530 1471 0.00      
25 B2u 1233 1185 18.78      
26 B2u 928 891 0.00      
27 B2u 345 331 7.04      
28 B3g 3117 2995 0.00      
29 B3g 1184 1138 0.00      
30 B3g 1039 998 0.00      
31 B3g 371 357 0.00      
32 B3u 3068 2948 82.46      
33 B3u 1542 1482 2.34      
34 B3u 1208 1161 1.77      
35 B3u 1164 1119 0.72      
36 B3u 724 696 0.31      

Unscaled Zero Point Vibrational Energy (zpe) 26411.1 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 25383.7 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 QCISD/3-21G*
ABC
0.26653 0.10734 0.08139

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.668 0.000
C2 0.000 -0.668 0.000
C3 1.568 -0.829 0.000
C4 1.568 0.829 0.000
C5 -1.568 0.829 0.000
C6 -1.568 -0.829 0.000
H7 -2.006 -1.268 0.904
H8 -2.006 -1.268 -0.904
H9 -2.006 1.268 0.904
H10 -2.006 1.268 -0.904
H11 2.006 -1.268 0.904
H12 2.006 -1.268 -0.904
H13 2.006 1.268 0.904
H14 2.006 1.268 -0.904

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.33612.16781.57611.57612.16782.93112.93112.28112.28112.93112.93112.28112.2811
C21.33611.57612.16782.16781.57612.28112.28112.93112.93112.28112.28112.93112.9311
C32.16781.57611.65793.54713.13583.71303.71304.24154.24151.09661.09662.32522.3252
C41.57612.16781.65793.13583.54714.24154.24153.71303.71302.32522.32521.09661.0966
C51.57612.16783.54713.13581.65792.32522.32521.09661.09664.24154.24153.71303.7130
C62.16781.57613.13583.54711.65791.09661.09662.32522.32523.71303.71304.24154.2415
H72.93112.28113.71304.24152.32521.09661.80852.53573.11454.01294.40164.74695.0797
H82.93112.28113.71304.24152.32521.09661.80853.11452.53574.40164.01295.07974.7469
H92.28112.93114.24153.71301.09662.32522.53573.11451.80854.74695.07974.01294.4016
H102.28112.93114.24153.71301.09662.32523.11452.53571.80855.07974.74694.40164.0129
H112.93112.28111.09662.32524.24153.71304.01294.40164.74695.07971.80852.53573.1145
H122.93112.28111.09662.32524.24153.71304.40164.01295.07974.74691.80853.11452.5357
H132.28112.93112.32521.09663.71304.24154.74695.07974.01294.40162.53573.11451.8085
H142.28112.93112.32521.09663.71304.24155.07974.74694.40164.01293.11452.53571.8085

picture of Bicyclo[2.2.0]hex-1(4)-ene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 95.859 C1 C2 C6 95.859
C1 C4 C3 84.141 C1 C4 H13 116.019
C1 C4 H14 116.019 C1 C5 C6 84.141
C1 C5 H9 116.019 C1 C5 H10 116.019
C2 C1 C4 95.859 C2 C1 C5 95.859
C2 C3 C4 84.141 C2 C3 H11 116.019
C2 C3 H12 116.019 C2 C6 C5 84.141
C2 C6 H7 116.019 C2 C6 H8 116.019
C3 C2 C6 168.281 C3 C4 H13 113.591
C3 C4 H14 113.591 C4 C1 C5 168.281
C4 C3 H11 113.591 C4 C3 H12 113.591
C5 C6 H7 113.591 C5 C6 H8 113.591
C6 C5 H9 113.591 C6 C5 H10 113.591
H7 C6 H8 111.090 H9 C5 H10 111.090
H11 C3 H12 111.090 H13 C4 H14 111.090
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability