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

using model chemistry: HF/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at HF/LANL2DZ
 hartrees
Energy at 0K-428.341980
Energy at 298.15K 
HF Energy-428.341980
Nuclear repulsion energy340.241640
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 HF/LANL2DZ
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 3447 3102 0.00 252.85 0.14 0.25
2 Ag 1808 1627 0.00 5.84 0.51 0.67
3 Ag 1341 1207 0.00 18.72 0.16 0.27
4 Ag 1280 1152 0.00 10.21 0.73 0.85
5 Ag 905 815 0.00 40.84 0.12 0.21
6 Ag 484 435 0.00 7.20 0.50 0.66
7 Au 1106 996 0.00 0.00 0.00 0.00
8 Au 479 431 0.00 0.00 0.00 0.00
9 B1g 946 851 0.00 0.20 0.75 0.86
10 B1u 3428 3085 4.48 0.00 0.75 0.86
11 B1u 1674 1507 225.38 0.00 0.00 0.00
12 B1u 1311 1180 157.12 0.00 0.00 0.00
13 B1u 1119 1007 8.88 0.00 0.00 0.00
14 B1u 777 699 69.97 0.00 0.00 0.00
15 B2g 1090 981 0.00 0.48 0.75 0.86
16 B2g 799 719 0.00 0.01 0.75 0.86
17 B2g 410 369 0.00 4.32 0.75 0.86
18 B2u 3445 3100 2.75 0.00 0.14 0.24
19 B2u 1558 1402 0.00 0.00 0.00 0.00
20 B2u 1332 1199 0.72 0.00 0.74 0.85
21 B2u 1203 1083 12.59 0.00 0.00 0.00
22 B2u 354 319 11.63 0.00 0.00 0.00
23 B3g 3429 3086 0.00 95.03 0.75 0.86
24 B3g 1803 1622 0.00 23.17 0.75 0.86
25 B3g 1443 1299 0.00 0.28 0.75 0.86
26 B3g 703 633 0.00 10.14 0.75 0.86
27 B3g 465 419 0.00 0.16 0.75 0.86
28 B3u 977 879 146.66 0.00 0.00 0.00
29 B3u 573 515 26.22 0.00 0.00 0.00
30 B3u 175 158 5.26 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 19931.9 cm-1
Scaled (by 0.8999) Zero Point Vibrational Energy (zpe) 17936.7 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 HF/LANL2DZ
ABC
0.18857 0.04705 0.03765

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/LANL2DZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.357
C2 0.000 0.000 -1.357
C3 0.000 1.217 0.697
C4 0.000 -1.217 0.697
C5 0.000 -1.217 -0.697
C6 0.000 1.217 -0.697
F7 0.000 0.000 2.736
F8 0.000 0.000 -2.736
H9 0.000 2.130 1.256
H10 0.000 -2.130 1.256
H11 0.000 -2.130 -1.256
H12 0.000 2.130 -1.256

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.71461.38461.38462.38802.38801.37854.09312.13212.13213.37123.3712
C22.71462.38802.38801.38461.38464.09311.37853.37123.37122.13212.1321
C31.38462.38802.43432.80551.39452.37423.64241.07003.39323.87522.1559
C41.38462.38802.43431.39452.80552.37423.64243.39321.07002.15593.8752
C52.38801.38462.80551.39452.43433.64242.37423.87522.15591.07003.3932
C62.38801.38461.39452.80552.43433.64242.37422.15593.87523.39321.0700
F71.37854.09312.37422.37423.64243.64245.47152.59332.59334.52444.5244
F84.09311.37853.64243.64242.37422.37425.47154.52444.52442.59332.5933
H92.13213.37121.07003.39323.87522.15592.59334.52444.25954.94502.5120
H102.13213.37123.39321.07002.15593.87522.59334.52444.25952.51204.9450
H113.37122.13213.87522.15591.07003.39324.52442.59334.94502.51204.2595
H123.37122.13212.15593.87523.39321.07004.52442.59332.51204.94504.2595

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 118.470 C1 C3 H9 120.052
C1 C4 C5 118.470 C1 C4 H10 120.052
C2 C5 C4 118.470 C2 C5 H11 120.052
C2 C6 C3 118.470 C2 C6 H12 120.052
C3 C1 C4 123.060 C3 C1 F7 118.470
C3 C6 H12 121.478 C4 C1 F7 118.470
C4 C5 H11 121.478 C5 C2 C6 123.060
C5 C2 F8 118.470 C5 C4 H10 121.478
C6 C2 F8 118.470 C6 C3 H9 121.478
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.429      
2 C 0.429      
3 C -0.296      
4 C -0.296      
5 C -0.296      
6 C -0.296      
7 F -0.353      
8 F -0.353      
9 H 0.258      
10 H 0.258      
11 H 0.258      
12 H 0.258      


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 -47.841 0.000 0.000
y 0.000 -36.230 0.000
z 0.000 0.000 -59.386
Traceless
 xyz
x -0.033 0.000 0.000
y 0.000 17.383 0.000
z 0.000 0.000 -17.350
Polar
3z2-r2-34.700
x2-y2-11.611
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.694 0.000 0.000
y 0.000 9.764 0.000
z 0.000 0.000 10.188


<r2> (average value of r2) Å2
<r2> 258.370
(<r2>)1/2 16.074