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 C8H8 (cyclooctatetraene)

using model chemistry: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-309.364862
Energy at 298.15K-309.372770
Nuclear repulsion energy324.035825
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 B1B95/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3184 3037 0.00      
2 A1 1774 1692 0.00      
3 A1 1270 1211 0.00      
4 A1 912 870 0.00      
5 A1 796 759 0.00      
6 A1 180 171 0.00      
7 A2 3144 2998 0.00      
8 A2 1423 1357 0.00      
9 A2 1041 992 0.00      
10 A2 961 916 0.00      
11 A2 235 224 0.00      
12 B1 3154 3008 0.00      
13 B1 1501 1431 0.00      
14 B1 1083 1033 0.00      
15 B1 1012 965 0.00      
16 B1 686 654 0.00      
17 B1 265 253 0.00      
18 B2 3166 3020 46.68      
19 B2 1732 1651 1.30      
20 B2 1267 1209 1.18      
21 B2 705 673 104.23      
22 B2 296 283 2.37      
23 E 3175 3028 84.54      
23 E 3175 3028 84.54      
24 E 3148 3002 0.93      
24 E 3148 3002 0.93      
25 E 1739 1658 1.91      
25 E 1739 1658 1.91      
26 E 1466 1398 0.51      
26 E 1466 1398 0.51      
27 E 1285 1225 0.42      
27 E 1285 1225 0.42      
28 E 1030 982 0.39      
28 E 1030 982 0.39      
29 E 986 940 1.86      
29 E 986 940 1.86      
30 E 836 797 22.04      
30 E 836 797 22.04      
31 E 661 630 20.11      
31 E 661 630 20.11      
32 E 366 349 1.44      
32 E 366 349 1.44      

Unscaled Zero Point Vibrational Energy (zpe) 29583.0 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 28213.3 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 B1B95/6-31G
ABC
0.09015 0.09015 0.05098

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.671 1.556 0.385
C2 -0.671 1.556 0.385
C3 0.671 -1.556 0.385
C4 -0.671 -1.556 0.385
C5 1.556 0.671 -0.385
C6 -1.556 0.671 -0.385
C7 1.556 -0.671 -0.385
C8 -1.556 -0.671 -0.385
H9 1.178 2.331 0.959
H10 -1.178 2.331 0.959
H11 1.178 -2.331 0.959
H12 -1.178 -2.331 0.959
H13 2.331 1.178 -0.959
H14 -2.331 1.178 -0.959
H15 2.331 -1.178 -0.959
H16 -2.331 -1.178 -0.959

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14 H15 H16
C11.34253.11193.38911.46942.51732.51733.24261.08962.08583.96194.34292.16923.31133.46964.2776
C21.34253.38913.11192.51731.46943.24262.51732.08581.08964.34293.96193.31132.16924.27763.4696
C33.11193.38911.34252.51733.24261.46942.51733.96194.34291.08962.08583.46964.27762.16923.3113
C43.38913.11191.34253.24262.51732.51731.46944.34293.96192.08581.08964.27763.46963.31132.1692
C51.46942.51732.51733.24263.11191.34253.38912.16923.46963.31134.27761.08963.96192.08584.3429
C62.51731.46943.24262.51733.11193.38911.34253.46962.16924.27763.31133.96191.08964.34292.0858
C72.51733.24261.46942.51731.34253.38913.11193.31134.27762.16923.46962.08584.34291.08963.9619
C83.24262.51732.51731.46943.38911.34253.11194.27763.31133.46962.16924.34292.08583.96191.0896
H91.08962.08583.96194.34292.16923.46963.31134.27762.35634.66275.22432.51744.16224.16225.3208
H102.08581.08964.34293.96193.46962.16924.27763.31132.35635.22434.66274.16222.51745.32084.1622
H113.96194.34291.08962.08583.31134.27762.16923.46964.66275.22432.35634.16225.32082.51744.1622
H124.34293.96192.08581.08964.27763.31133.46962.16925.22434.66272.35635.32084.16224.16222.5174
H132.16923.31133.46964.27761.08963.96192.08584.34292.51744.16224.16225.32084.66272.35635.2243
H143.31132.16924.27763.46963.96191.08964.34292.08584.16222.51745.32084.16224.66275.22432.3563
H153.46964.27762.16923.31132.08584.34291.08963.96194.16225.32082.51744.16222.35635.22434.6627
H164.27763.46963.31132.16924.34292.08583.96191.08965.32084.16224.16222.51745.22432.35634.6627

picture of cyclooctatetraene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C6 127.019 C1 C2 H10 117.725
C1 C5 C7 127.019 C1 C5 H13 115.114
C2 C1 C5 127.019 C2 C1 H9 117.725
C2 C6 C8 127.019 C2 C6 H14 115.114
C3 C4 C8 127.019 C3 C4 H12 117.725
C3 C7 C5 127.019 C3 C7 H15 115.114
C4 C3 C7 127.019 C4 C3 H11 117.725
C4 C8 C6 127.019 C4 C8 H16 115.114
C5 C1 H9 115.114 C5 C7 H15 117.725
C6 C2 H10 115.114 C6 C8 H16 117.725
C7 C3 H11 115.114 C7 C5 H13 117.725
C8 C4 H12 115.114 C8 C6 H14 117.725
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.150      
2 C -0.150      
3 C -0.150      
4 C -0.150      
5 C -0.150      
6 C -0.150      
7 C -0.150      
8 C -0.150      
9 H 0.150      
10 H 0.150      
11 H 0.150      
12 H 0.150      
13 H 0.150      
14 H 0.150      
15 H 0.150      
16 H 0.150      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.023 0.000 0.000
y 0.000 -43.023 0.000
z 0.000 0.000 -48.439
Traceless
 xyz
x 2.708 0.000 0.000
y 0.000 2.708 0.000
z 0.000 0.000 -5.415
Polar
3z2-r2-10.831
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 13.516 0.000 0.000
y 0.000 13.516 0.000
z 0.000 0.000 6.497


<r2> (average value of r2) Å2
<r2> 234.900
(<r2>)1/2 15.326