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All results from a given calculation for C6H4F2 (1,4-difluorobenzene)

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 D2H 1Ag
Energy calculated at B3LYP/6-31G**
 hartrees
Energy at 0K-430.720166
Energy at 298.15K 
HF Energy-430.720166
Nuclear repulsion energy340.772719
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 Ag 3229 3102 0.00 275.40 0.16 0.27
2 Ag 1671 1606 0.00 7.44 0.70 0.82
3 Ag 1302 1251 0.00 14.88 0.17 0.29
4 Ag 1162 1117 0.00 9.43 0.70 0.82
5 Ag 875 841 0.00 32.50 0.10 0.18
6 Ag 455 437 0.00 4.53 0.45 0.62
7 Au 950 912 0.00 0.00 0.00 0.00
8 Au 435 418 0.00 0.00 0.00 0.00
9 B1g 813 781 0.00 5.81 0.75 0.86
10 B1u 3215 3089 6.78 0.00 0.00 0.00
11 B1u 1557 1496 236.33 0.00 0.00 0.00
12 B1u 1254 1205 161.19 0.00 0.00 0.00
13 B1u 1027 986 1.39 0.00 0.00 0.00
14 B1u 749 720 50.86 0.00 0.00 0.00
15 B2g 927 891 0.00 3.18 0.75 0.86
16 B2g 688 661 0.00 0.15 0.75 0.86
17 B2g 380 365 0.00 4.10 0.75 0.86
18 B2u 3228 3101 2.09 0.00 0.00 0.00
19 B2u 1453 1396 0.58 0.00 0.00 0.00
20 B2u 1350 1297 0.46 0.00 0.00 0.00
21 B2u 1108 1065 12.45 0.00 0.00 0.00
22 B2u 347 333 3.97 0.00 0.00 0.00
23 B3g 3217 3091 0.00 128.49 0.75 0.86
24 B3g 1662 1596 0.00 7.64 0.75 0.86
25 B3g 1300 1249 0.00 2.37 0.75 0.86
26 B3g 648 622 0.00 7.55 0.75 0.86
27 B3g 446 428 0.00 0.14 0.75 0.86
28 B3u 842 809 71.15 0.00 0.00 0.00
29 B3u 518 498 8.27 0.00 0.00 0.00
30 B3u 162 156 1.52 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18483.3 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 17758.7 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
0.18824 0.04731 0.03781

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.371
C2 0.000 0.000 -1.371
C3 0.000 1.217 0.698
C4 0.000 -1.217 0.698
C5 0.000 -1.217 -0.698
C6 0.000 1.217 -0.698
F7 0.000 0.000 2.722
F8 0.000 0.000 -2.722
H9 0.000 2.142 1.262
H10 0.000 -2.142 1.262
H11 0.000 -2.142 -1.262
H12 0.000 2.142 -1.262

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.74221.39071.39072.39992.39991.35044.09262.14492.14493.39473.3947
C22.74222.39992.39991.39071.39074.09261.35043.39473.39472.14492.1449
C31.39072.39992.43342.80501.39512.36153.62911.08423.40603.88892.1675
C41.39072.39992.43341.39512.80502.36153.62913.40601.08422.16753.8889
C52.39991.39072.80501.39512.43343.62912.36153.88892.16751.08423.4060
C62.39991.39071.39512.80502.43343.62912.36152.16753.88893.40601.0842
F71.35044.09262.36152.36153.62913.62915.44302.59182.59184.52334.5233
F84.09261.35043.62913.62912.36152.36155.44304.52334.52332.59182.5918
H92.14493.39471.08423.40603.88892.16752.59184.52334.28434.97292.5249
H102.14493.39473.40601.08422.16753.88892.59184.52334.28432.52494.9729
H113.39472.14493.88892.16751.08423.40604.52332.59184.97292.52494.2843
H123.39472.14492.16753.88893.40601.08424.52332.59182.52494.97294.2843

picture of 1,4-difluorobenzene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 118.968 C1 C3 H9 119.633
C1 C4 C5 118.968 C1 C4 H10 119.633
C2 C5 C4 118.968 C2 C5 H11 119.633
C2 C6 C3 118.968 C2 C6 H12 119.633
C3 C1 C4 122.064 C3 C1 F7 118.968
C3 C6 H12 121.399 C4 C1 F7 118.968
C4 C5 H11 121.399 C5 C2 C6 122.064
C5 C2 F8 118.968 C5 C4 H10 121.399
C6 C2 F8 118.968 C6 C3 H9 121.399
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 0.352      
2 C 0.352      
3 C -0.138      
4 C -0.138      
5 C -0.138      
6 C -0.138      
7 F -0.298      
8 F -0.298      
9 H 0.111      
10 H 0.111      
11 H 0.111      
12 H 0.111      


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 -45.277 0.000 0.000
y 0.000 -36.871 0.000
z 0.000 0.000 -49.374
Traceless
 xyz
x -2.155 0.000 0.000
y 0.000 10.454 0.000
z 0.000 0.000 -8.299
Polar
3z2-r2-16.599
x2-y2-8.406
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.455 0.000 0.000
y 0.000 10.549 0.000
z 0.000 0.000 10.948


<r2> (average value of r2) Å2
<r2> 255.198
(<r2>)1/2 15.975