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All results from a given calculation for C6H8 (1,4-Cyclohexadiene)

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 C2V 1Ag
Energy calculated at QCISD/6-311G*
 hartrees
Energy at 0K-232.728721
Energy at 298.15K-232.737232
HF Energy-231.872866
Nuclear repulsion energy217.089246
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 Ag 3169 3034 0.00      
2 Ag 3010 2882 0.00      
3 Ag 1764 1689 0.00      
4 Ag 1510 1446 0.00      
5 Ag 1239 1186 0.00      
6 Ag 869 832 0.00      
7 Ag 541 518 0.00      
8 Au 1236 1183 0.00      
9 Au 966 925 0.00      
10 Au 368 353 0.00      
11 B1g 3144 3010 0.00      
12 B1g 1435 1373 0.00      
13 B1g 1384 1325 0.00      
14 B1g 1066 1020 0.00      
15 B1g 577 552 0.00      
16 B1u 3030 2901 52.10      
17 B1u 1007 964 30.28      
18 B1u 632 605 72.37      
19 B1u 89 85 0.59      
20 B2g 3031 2901 0.00      
21 B2g 1000 958 0.00      
22 B2g 954 914 0.00      
23 B2g 350 335 0.00      
24 B2u 3166 3031 83.11      
25 B2u 1721 1647 3.37      
26 B2u 1414 1354 0.58      
27 B2u 1194 1143 0.16      
28 B2u 960 919 0.50      
29 B3g 1242 1189 0.00      
30 B3g 723 692 0.00      
31 B3u 3144 3010 20.35      
32 B3u 3011 2883 85.27      
33 B3u 1511 1447 5.82      
34 B3u 1453 1392 0.53      
35 B3u 975 934 1.14      
36 B3u 911 872 8.68      

Unscaled Zero Point Vibrational Energy (zpe) 26897.7 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 25751.9 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
0.17087 0.16201 0.08577

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.506 0.000 0.000
C2 -1.506 0.000 0.000
C3 -0.670 1.258 0.000
C4 0.670 1.258 0.000
C5 -0.670 -1.258 0.000
C6 0.670 -1.258 0.000
H7 1.207 -2.208 0.000
H8 -1.207 -2.208 0.000
H9 1.207 2.208 0.000
H10 -1.207 2.208 0.000
H11 2.177 0.000 0.874
H12 -2.177 0.000 0.874
H13 2.177 0.000 -0.874
H14 -2.177 0.000 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C13.01232.51351.51032.51351.51032.22793.49792.22793.49791.10203.78541.10203.7854
C23.01231.51032.51351.51032.51353.49792.22793.49792.22793.78541.10203.78541.1020
C32.51351.51031.34002.51542.85013.94113.50682.10381.09133.23292.14873.23292.1487
C41.51032.51351.34002.85012.51543.50683.94111.09132.10382.14873.23292.14873.2329
C52.51351.51032.51542.85011.34002.10381.09133.94113.50683.23292.14873.23292.1487
C61.51032.51352.85012.51541.34001.09132.10383.50683.94112.14873.23292.14873.2329
H72.22793.49793.94113.50682.10381.09132.41414.41555.03232.56504.13402.56504.1340
H83.49792.22793.50683.94111.09132.10382.41415.03234.41554.13402.56504.13402.5650
H92.22793.49792.10381.09133.94113.50684.41555.03232.41412.56504.13402.56504.1340
H103.49792.22791.09132.10383.50683.94115.03234.41552.41414.13402.56504.13402.5650
H111.10203.78543.23292.14873.23292.14872.56504.13402.56504.13404.35381.74874.6919
H123.78541.10202.14873.23292.14873.23294.13402.56504.13402.56504.35384.69191.7487
H131.10203.78543.23292.14873.23292.14872.56504.13402.56504.13401.74874.69194.3538
H143.78541.10202.14873.23292.14873.23294.13402.56504.13402.56504.69191.74874.3538

picture of 1,4-Cyclohexadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C4 C3 123.617 C1 C4 H9 116.905
C1 C6 C5 123.617 C1 C6 H7 116.905
C2 C3 C4 123.617 C2 C3 H10 116.905
C2 C5 C6 123.617 C2 C5 H8 116.905
C3 C2 C5 112.767 C3 C2 H12 109.693
C3 C2 H14 109.693 C3 C4 H9 119.478
C4 C1 C6 112.767 C4 C1 H11 109.693
C4 C1 H13 109.693 C4 C3 H10 119.478
C5 C2 H12 109.693 C5 C2 H14 109.693
C5 C6 H7 119.478 C6 C1 H11 109.693
C6 C1 H13 109.693 C6 C5 H8 119.478
H11 C1 H13 105.012 H12 C2 H14 105.012
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at QCISD/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.434     0.000
2 C -0.434     0.000
3 C -0.207     0.000
4 C -0.207     0.000
5 C -0.207     0.000
6 C -0.207     0.000
7 H 0.206     0.000
8 H 0.206     0.000
9 H 0.206     0.000
10 H 0.206     0.000
11 H 0.218     0.000
12 H 0.218     0.000
13 H 0.218     0.000
14 H 0.218     0.000


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000