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

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1Ag
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-231.071680
Energy at 298.15K-231.080266
HF Energy-230.540244
Nuclear repulsion energy216.035148
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 MP2/3-21G
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 3195 3049 0.00      
2 Ag 3050 2911 0.00      
3 Ag 1720 1642 0.00      
4 Ag 1574 1502 0.00      
5 Ag 1294 1235 0.00      
6 Ag 836 798 0.00      
7 Ag 557 532 0.00      
8 Au 1286 1227 0.00      
9 Au 1012 966 0.00      
10 Au 377 360 0.00      
11 B1g 3166 3022 0.00      
12 B1g 1452 1386 0.00      
13 B1g 1395 1331 0.00      
14 B1g 1067 1018 0.00      
15 B1g 593 566 0.00      
16 B1u 3072 2933 38.22      
17 B1u 1045 997 17.84      
18 B1u 655 625 79.62      
19 B1u 65 62 0.48      
20 B2g 3073 2933 0.00      
21 B2g 1044 997 0.00      
22 B2g 996 951 0.00      
23 B2g 381 363 0.00      
24 B2u 3191 3046 67.67      
25 B2u 1684 1608 1.22      
26 B2u 1404 1340 1.72      
27 B2u 1244 1188 0.58      
28 B2u 929 887 0.43      
29 B3g 1290 1231 0.00      
30 B3g 742 708 0.00      
31 B3u 3167 3023 13.13      
32 B3u 3051 2913 47.71      
33 B3u 1583 1511 3.45      
34 B3u 1490 1422 0.06      
35 B3u 1004 958 0.53      
36 B3u 875 835 6.95      

Unscaled Zero Point Vibrational Energy (zpe) 27277.0 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 26035.9 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 MP2/3-21G
ABC
0.16906 0.16010 0.08482

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.520 0.000 0.000
C2 -1.520 0.000 0.000
C3 -0.672 1.266 0.000
C4 0.672 1.266 0.000
C5 -0.672 -1.266 0.000
C6 0.672 -1.266 0.000
H7 1.212 -2.211 0.000
H8 -1.212 -2.211 0.000
H9 1.212 2.211 0.000
H10 -1.212 2.211 0.000
H11 2.180 0.000 0.881
H12 -2.180 0.000 0.881
H13 2.180 0.000 -0.881
H14 -2.180 0.000 -0.881

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C13.03932.53061.52342.53061.52342.23213.51432.23213.51431.10103.80291.10103.8029
C23.03931.52342.53061.52342.53063.51432.23213.51432.23213.80291.10103.80291.1010
C32.53061.52341.34352.53122.86573.95403.51812.10771.08883.24182.15693.24182.1569
C41.52342.53061.34352.86572.53123.51813.95401.08882.10772.15693.24182.15693.2418
C52.53061.52342.53122.86571.34352.10771.08883.95403.51813.24182.15693.24182.1569
C61.52342.53062.86572.53121.34351.08882.10773.51813.95402.15693.24182.15693.2418
H72.23213.51433.95403.51812.10771.08882.42434.42165.04262.56914.14362.56914.1436
H83.51432.23213.51813.95401.08882.10772.42435.04264.42164.14362.56914.14362.5691
H92.23213.51432.10771.08883.95403.51814.42165.04262.42432.56914.14362.56914.1436
H103.51432.23211.08882.10773.51813.95405.04264.42162.42434.14362.56914.14362.5691
H111.10103.80293.24182.15693.24182.15692.56914.14362.56914.14364.35951.76234.7022
H123.80291.10102.15693.24182.15693.24184.14362.56914.14362.56914.35954.70221.7623
H131.10103.80293.24182.15693.24182.15692.56914.14362.56914.14361.76234.70224.3595
H143.80291.10102.15693.24182.15693.24184.14362.56914.14362.56914.70221.76234.3595

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 123.820 C1 C4 H9 116.423
C1 C6 C5 123.820 C1 C6 H7 116.423
C2 C3 C4 123.820 C2 C3 H10 116.423
C2 C5 C6 123.820 C2 C5 H8 116.423
C3 C2 C5 112.361 C3 C2 H12 109.493
C3 C2 H14 109.493 C3 C4 H9 119.758
C4 C1 C6 112.361 C4 C1 H11 109.493
C4 C1 H13 109.493 C4 C3 H10 119.758
C5 C2 H12 109.493 C5 C2 H14 109.493
C5 C6 H7 119.758 C6 C1 H11 109.493
C6 C1 H13 109.493 C6 C5 H8 119.758
H11 C1 H13 106.325 H12 C2 H14 106.325
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.477     0.210
2 C -0.477     0.231
3 C -0.151     -0.229
4 C -0.151     -0.219
5 C -0.151     -0.229
6 C -0.151     -0.219
7 H 0.183     0.115
8 H 0.183     0.116
9 H 0.183     0.115
10 H 0.183     0.116
11 H 0.206     0.000
12 H 0.206     -0.004
13 H 0.206     0.000
14 H 0.206     -0.004


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 -36.199 0.000 0.000
y 0.000 -34.382 0.000
z 0.000 0.000 -40.299
Traceless
 xyz
x 1.142 0.000 0.000
y 0.000 3.867 0.000
z 0.000 0.000 -5.009
Polar
3z2-r2-10.017
x2-y2-1.817
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.896 0.000 0.000
y 0.000 10.608 0.000
z 0.000 0.000 4.330


<r2> (average value of r2) Å2
<r2> 147.439
(<r2>)1/2 12.142