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

using model chemistry: B1B95/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B1B95/TZVP
 hartrees
Energy at 0K-430.729413
Energy at 298.15K 
HF Energy-430.729413
Nuclear repulsion energy343.332143
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 B1B95/TZVP
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 3244 3104 0.00 290.50 0.15 0.26
2 Ag 1685 1613 0.00 5.61 0.69 0.82
3 Ag 1303 1247 0.00 24.76 0.06 0.12
4 Ag 1167 1117 0.00 7.13 0.61 0.76
5 Ag 880 842 0.00 35.48 0.06 0.12
6 Ag 458 438 0.00 5.25 0.44 0.62
7 Au 936 895 0.00 0.00 0.00 0.00
8 Au 422 404 0.00 0.00 0.00 0.00
9 B1g 809 774 0.00 0.06 0.75 0.86
10 B1u 3230 3091 3.62 0.00 0.00 0.00
11 B1u 1563 1496 279.63 0.00 0.00 0.00
12 B1u 1245 1191 191.86 0.00 0.00 0.00
13 B1u 1034 989 4.15 0.00 0.00 0.00
14 B1u 758 725 62.90 0.00 0.00 0.00
15 B2g 877 840 0.00 0.20 0.75 0.86
16 B2g 577 552 0.00 1.73 0.75 0.86
17 B2g 343 329 0.00 1.82 0.75 0.86
18 B2u 3243 3104 0.01 0.00 0.00 0.00
19 B2u 1464 1401 1.02 0.00 0.00 0.00
20 B2u 1358 1300 0.03 0.00 0.00 0.00
21 B2u 1115 1066 12.59 0.00 0.00 0.00
22 B2u 353 338 4.99 0.00 0.00 0.00
23 B3g 3232 3093 0.00 116.72 0.75 0.86
24 B3g 1682 1609 0.00 8.65 0.75 0.86
25 B3g 1308 1251 0.00 1.37 0.75 0.86
26 B3g 647 620 0.00 7.69 0.75 0.86
27 B3g 451 431 0.00 0.04 0.75 0.86
28 B3u 846 810 83.01 0.00 0.00 0.00
29 B3u 517 494 17.36 0.00 0.00 0.00
30 B3u 158 152 1.79 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18452.1 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 17656.8 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 B1B95/TZVP
ABC
0.19115 0.04803 0.03839

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/TZVP

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.359
C2 0.000 0.000 -1.359
C3 0.000 1.207 0.692
C4 0.000 -1.207 0.692
C5 0.000 -1.207 -0.692
C6 0.000 1.207 -0.692
F7 0.000 0.000 2.701
F8 0.000 0.000 -2.701
H9 0.000 2.129 1.253
H10 0.000 -2.129 1.253
H11 0.000 -2.129 -1.253
H12 0.000 2.129 -1.253

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.71891.37901.37902.38032.38031.34184.06082.13212.13213.37063.3706
C22.71892.38032.38031.37901.37904.06081.34183.37063.37062.13212.1321
C31.37902.38032.41372.78261.38452.34373.60181.07973.38313.86212.1532
C41.37902.38032.41371.38452.78262.34373.60183.38311.07972.15323.8621
C52.38031.37902.78261.38452.41373.60182.34373.86212.15321.07973.3831
C62.38031.37901.38452.78262.41373.60182.34372.15323.86213.38311.0797
F71.34184.06082.34372.34373.60183.60185.40262.57512.57514.49144.4914
F84.06081.34183.60183.60182.34372.34375.40264.49144.49142.57512.5751
H92.13213.37061.07973.38313.86212.15322.57514.49144.25884.94172.5065
H102.13213.37063.38311.07972.15323.86212.57514.49144.25882.50654.9417
H113.37062.13213.86212.15321.07973.38314.49142.57514.94172.50654.2588
H123.37062.13212.15323.86213.38311.07974.49142.57512.50654.94174.2588

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 118.936 C1 C3 H9 119.760
C1 C4 C5 118.936 C1 C4 H10 119.760
C2 C5 C4 118.936 C2 C5 H11 119.760
C2 C6 C3 118.936 C2 C6 H12 119.760
C3 C1 C4 122.128 C3 C1 F7 118.936
C3 C6 H12 121.304 C4 C1 F7 118.936
C4 C5 H11 121.304 C5 C2 C6 122.128
C5 C2 F8 118.936 C5 C4 H10 121.304
C6 C2 F8 118.936 C6 C3 H9 121.304
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.238      
2 C 0.238      
3 C -0.175      
4 C -0.175      
5 C -0.175      
6 C -0.175      
7 F -0.189      
8 F -0.189      
9 H 0.151      
10 H 0.151      
11 H 0.151      
12 H 0.151      


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 -46.328 0.000 0.000
y 0.000 -36.646 0.000
z 0.000 0.000 -52.055
Traceless
 xyz
x -1.978 0.000 0.000
y 0.000 12.545 0.000
z 0.000 0.000 -10.567
Polar
3z2-r2-21.135
x2-y2-9.682
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.320 0.000 0.000
y 0.000 10.966 0.000
z 0.000 0.000 11.453


<r2> (average value of r2) Å2
<r2> 252.514
(<r2>)1/2 15.891