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 (cubane)

using model chemistry: B3LYP/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes OH 1A1G
Energy calculated at B3LYP/6-31G
 hartrees
Energy at 0K-309.368071
Energy at 298.15K-309.378090
HF Energy-309.368071
Nuclear repulsion energy363.873481
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 B3LYP/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 A1g 3182 3061 0.00 485.66 0.00 0.00
2 A1g 1010 972 0.00 64.30 0.00 0.00
3 A2u 3139 3020 0.00 0.00 0.00 0.00
4 A2u 1040 1001 0.00 0.00 0.00 0.00
5 Eg 1115 1072 0.00 1.85 0.75 0.86
5 Eg 1115 1072 0.00 1.85 0.75 0.86
6 Eg 926 891 0.00 38.31 0.75 0.86
6 Eg 926 891 0.00 38.31 0.75 0.86
7 Eu 1214 1167 0.00 0.00 0.00 0.00
7 Eu 1214 1167 0.00 0.00 0.00 0.00
8 Eu 626 602 0.00 0.00 0.00 0.00
8 Eu 626 602 0.00 0.00 0.00 0.00
9 T1g 1181 1136 0.00 0.00 0.00 0.00
9 T1g 1181 1136 0.00 0.00 0.00 0.00
9 T1g 1181 1136 0.00 0.00 0.00 0.00
10 T1u 3158 3038 124.03 0.00 0.00 0.00
10 T1u 3158 3038 124.03 0.00 0.00 0.00
10 T1u 3158 3038 124.03 0.00 0.00 0.00
11 T1u 1270 1222 5.15 0.00 0.00 0.00
11 T1u 1270 1222 5.15 0.00 0.00 0.00
11 T1u 1270 1222 5.15 0.00 0.00 0.00
12 T1u 862 830 10.41 0.00 0.00 0.00
12 T1u 862 830 10.41 0.00 0.00 0.00
12 T1u 862 830 10.41 0.00 0.00 0.00
13 T2g 3148 3029 0.00 221.86 0.75 0.86
13 T2g 3148 3029 0.00 221.86 0.75 0.86
13 T2g 3148 3029 0.00 221.86 0.75 0.86
14 T2g 1226 1179 0.00 13.19 0.75 0.86
14 T2g 1226 1179 0.00 13.19 0.75 0.86
14 T2g 1226 1179 0.00 13.19 0.75 0.86
15 T2g 836 804 0.00 8.75 0.75 0.86
15 T2g 836 804 0.00 8.75 0.75 0.86
15 T2g 836 804 0.00 8.75 0.75 0.86
16 T2g 692 665 0.00 1.22 0.75 0.86
16 T2g 692 665 0.00 1.22 0.75 0.86
16 T2g 692 665 0.00 1.22 0.75 0.86
17 T2u 1073 1032 0.00 0.00 0.00 0.00
17 T2u 1073 1032 0.00 0.00 0.00 0.00
17 T2u 1073 1032 0.00 0.00 0.00 0.00
18 T2u 846 814 0.00 0.00 0.00 0.00
18 T2u 846 814 0.00 0.00 0.00 0.00
18 T2u 846 814 0.00 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 29503.5 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 28382.3 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 B3LYP/6-31G
ABC
0.11000 0.11000 0.11000

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G

Point Group is Oh

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.793 0.793 0.793
C2 -0.793 0.793 0.793
C3 0.793 0.793 -0.793
C4 -0.793 0.793 -0.793
C5 0.793 -0.793 0.793
C6 -0.793 -0.793 0.793
C7 0.793 -0.793 -0.793
C8 -0.793 -0.793 -0.793
H9 1.421 1.421 1.421
H10 -1.421 1.421 1.421
H11 1.421 1.421 -1.421
H12 -1.421 1.421 -1.421
H13 1.421 -1.421 1.421
H14 -1.421 -1.421 1.421
H15 1.421 -1.421 -1.421
H16 -1.421 -1.421 -1.421

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14 H15 H16
C11.58551.58552.24231.58552.24232.24232.74621.08892.38602.38603.19382.38603.19383.19383.8351
C21.58552.24231.58552.24231.58552.74622.24232.38601.08893.19382.38603.19382.38603.83513.1938
C31.58552.24231.58552.24232.74621.58552.24232.38603.19381.08892.38603.19383.83512.38603.1938
C42.24231.58551.58552.74622.24232.24231.58553.19382.38602.38601.08893.83513.19383.19382.3860
C51.58552.24232.24232.74621.58551.58552.24232.38603.19383.19383.83511.08892.38602.38603.1938
C62.24231.58552.74622.24231.58552.24231.58553.19382.38603.83513.19382.38601.08893.19382.3860
C72.24232.74621.58552.24231.58552.24231.58553.19383.83512.38603.19382.38603.19381.08892.3860
C82.74622.24232.24231.58552.24231.58551.58553.83513.19383.19382.38603.19382.38602.38601.0889
H91.08892.38602.38603.19382.38603.19383.19383.83512.84282.84284.02042.84284.02044.02044.9240
H102.38601.08893.19382.38603.19382.38603.83513.19382.84284.02042.84284.02042.84284.92404.0204
H112.38603.19381.08892.38603.19383.83512.38603.19382.84284.02042.84284.02044.92402.84284.0204
H123.19382.38602.38601.08893.83513.19383.19382.38604.02042.84282.84284.92404.02044.02042.8428
H132.38603.19383.19383.83511.08892.38602.38603.19382.84284.02044.02044.92402.84282.84284.0204
H143.19382.38603.83513.19382.38601.08893.19382.38604.02042.84284.92404.02042.84284.02042.8428
H153.19383.83512.38603.19382.38603.19381.08892.38604.02044.92402.84284.02042.84284.02042.8428
H163.83513.19383.19382.38603.19382.38602.38601.08894.92404.02044.02042.84284.02042.84282.8428

picture of cubane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 90.000 C1 C2 C6 90.000
C1 C2 H10 125.264 C1 C3 C4 90.000
C1 C3 C7 90.000 C1 C3 H11 125.264
C1 C5 C6 90.000 C1 C5 C7 90.000
C1 C5 H13 125.264 C2 C1 C3 90.000
C2 C1 C5 90.000 C2 C1 H9 125.264
C2 C4 C3 90.000 C2 C4 C8 90.000
C2 C4 H12 125.264 C2 C6 C5 90.000
C2 C6 C8 90.000 C2 C6 H14 125.264
C3 C1 C5 90.000 C3 C1 H9 125.264
C3 C4 C8 90.000 C3 C4 H12 125.264
C3 C7 C5 90.000 C3 C7 C8 90.000
C3 C7 H15 125.264 C4 C2 C6 90.000
C4 C2 H10 125.264 C4 C3 C7 90.000
C4 C3 H11 125.264 C4 C8 C6 90.000
C4 C8 C7 90.000 C4 C8 H16 125.264
C5 C1 H9 125.264 C5 C6 C8 90.000
C5 C6 H14 125.264 C5 C7 C8 90.000
C5 C7 H15 125.264 C6 C2 H10 125.264
C6 C5 C7 90.000 C6 C5 H13 125.264
C6 C8 C7 90.000 C6 C8 H16 125.264
C7 C3 H11 125.264 C7 C5 H13 125.264
C7 C8 H16 125.264 C8 C4 H12 125.264
C8 C6 H14 125.264 C8 C7 H15 125.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.115      
2 C -0.115      
3 C -0.115      
4 C -0.115      
5 C -0.115      
6 C -0.115      
7 C -0.115      
8 C -0.115      
9 H 0.115      
10 H 0.115      
11 H 0.115      
12 H 0.115      
13 H 0.115      
14 H 0.115      
15 H 0.115      
16 H 0.115      


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 -46.413 0.000 0.000
y 0.000 -46.413 0.000
z 0.000 0.000 -46.413
Traceless
 xyz
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000
Polar
3z2-r20.000
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 9.789 0.000 0.000
y 0.000 9.789 0.000
z 0.000 0.000 9.789


<r2> (average value of r2) Å2
<r2> 167.978
(<r2>)1/2 12.961