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

using model chemistry: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1Ag
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-232.144804
Energy at 298.15K-232.153486
Nuclear repulsion energy217.216323
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/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 3180 3069 0.00      
2 Ag 3002 2896 0.00      
3 Ag 1758 1696 0.00      
4 Ag 1525 1472 0.00      
5 Ag 1272 1227 0.00      
6 Ag 844 814 0.00      
7 Ag 556 536 0.00      
8 Au 1278 1233 0.00      
9 Au 1023 987 0.00      
10 Au 385 372 0.00      
11 B1g 3153 3042 0.00      
12 B1g 1431 1381 0.00      
13 B1g 1388 1339 0.00      
14 B1g 1060 1023 0.00      
15 B1g 592 571 0.00      
16 B1u 3011 2906 44.85      
17 B1u 999 964 18.19      
18 B1u 645 623 81.72      
19 B1u 112 108 0.85      
20 B2g 3012 2906 0.00      
21 B2g 1040 1003 0.00      
22 B2g 985 951 0.00      
23 B2g 410 396 0.00      
24 B2u 3177 3065 72.74      
25 B2u 1718 1658 2.37      
26 B2u 1394 1345 1.92      
27 B2u 1225 1182 0.36      
28 B2u 937 904 0.45      
29 B3g 1278 1233 0.00      
30 B3g 731 705 0.00      
31 B3u 3154 3043 14.15      
32 B3u 3003 2898 69.25      
33 B3u 1532 1478 5.54      
34 B3u 1472 1420 0.11      
35 B3u 998 963 0.41      
36 B3u 875 845 10.64      

Unscaled Zero Point Vibrational Energy (zpe) 27076.6 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 26126.2 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/3-21G
ABC
0.17046 0.16255 0.08584

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.505 0.000 0.000
C2 -1.505 0.000 0.000
C3 -0.666 1.260 0.000
C4 0.666 1.260 0.000
C5 -0.666 -1.260 0.000
C6 0.666 -1.260 0.000
H7 1.210 -2.202 0.000
H8 -1.210 -2.202 0.000
H9 1.210 2.202 0.000
H10 -1.210 2.202 0.000
H11 2.171 0.000 0.879
H12 -2.171 0.000 0.879
H13 2.171 0.000 -0.879
H14 -2.171 0.000 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C13.01102.51091.51422.51091.51422.22163.49572.22163.49571.10223.78001.10223.7800
C23.01101.51422.51091.51422.51093.49572.22163.49572.22163.78001.10223.78001.1022
C32.51091.51421.33242.52052.85103.93763.50452.09891.08723.22642.15053.22642.1505
C41.51422.51091.33242.85102.52053.50453.93761.08722.09892.15053.22642.15053.2264
C52.51091.51422.52052.85101.33242.09891.08723.93763.50453.22642.15053.22642.1505
C61.51422.51092.85102.52051.33241.08722.09893.50453.93762.15053.22642.15053.2264
H72.22163.49573.93763.50452.09891.08722.41934.40375.02452.55824.12902.55824.1290
H83.49572.22163.50453.93761.08722.09892.41935.02454.40374.12902.55824.12902.5582
H92.22163.49572.09891.08723.93763.50454.40375.02452.41932.55824.12902.55824.1290
H103.49572.22161.08722.09893.50453.93765.02454.40372.41934.12902.55824.12902.5582
H111.10223.78003.22642.15053.22642.15052.55824.12902.55824.12904.34201.75724.6841
H123.78001.10222.15053.22642.15053.22644.12902.55824.12902.55824.34204.68411.7572
H131.10223.78003.22642.15053.22642.15052.55824.12902.55824.12901.75724.68414.3420
H143.78001.10222.15053.22642.15053.22644.12902.55824.12902.55824.68411.75724.3420

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 123.662 C1 C4 H9 116.347
C1 C6 C5 123.662 C1 C6 H7 116.347
C2 C3 C4 123.662 C2 C3 H10 116.347
C2 C5 C6 123.662 C2 C5 H8 116.347
C3 C2 C5 112.677 C3 C2 H12 109.553
C3 C2 H14 109.553 C3 C4 H9 119.992
C4 C1 C6 112.677 C4 C1 H11 109.553
C4 C1 H13 109.553 C4 C3 H10 119.992
C5 C2 H12 109.553 C5 C2 H14 109.553
C5 C6 H7 119.992 C6 C1 H11 109.553
C6 C1 H13 109.553 C6 C5 H8 119.992
H11 C1 H13 105.714 H12 C2 H14 105.714
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.480     0.199
2 C -0.480     0.215
3 C -0.147     -0.238
4 C -0.147     -0.230
5 C -0.147     -0.238
6 C -0.147     -0.230
7 H 0.178     0.124
8 H 0.178     0.124
9 H 0.178     0.124
10 H 0.178     0.124
11 H 0.209     0.008
12 H 0.209     0.005
13 H 0.209     0.008
14 H 0.209     0.005


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 -0.003 0.000 0.000 0.003


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.067 0.000 0.000
y 0.000 -33.137 0.000
z 0.000 0.000 -39.511
Traceless
 xyz
x 1.257 0.000 0.000
y 0.000 4.152 0.000
z 0.000 0.000 -5.409
Polar
3z2-r2-10.819
x2-y2-1.930
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.037 0.000 0.000
y 0.000 11.317 0.000
z 0.000 0.000 4.408


<r2> (average value of r2) Å2
<r2> 145.584
(<r2>)1/2 12.066