return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B3PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-430.559268
Energy at 298.15K 
HF Energy-430.559268
Nuclear repulsion energy341.384358
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 B3PW91/6-31G**
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 3240 3105 0.00      
2 Ag 1686 1616 0.00      
3 Ag 1318 1263 0.00      
4 Ag 1161 1113 0.00      
5 Ag 880 843 0.00      
6 Ag 455 436 0.00      
7 Au 950 911 0.00      
8 Au 433 415 0.00      
9 B1g 811 777 0.00      
10 B1u 3226 3092 5.89      
11 B1u 1564 1499 260.61      
12 B1u 1260 1208 149.37      
13 B1u 1026 984 2.43      
14 B1u 753 722 49.31      
15 B2g 926 888 0.00      
16 B2g 690 662 0.00      
17 B2g 382 366 0.00      
18 B2u 3239 3105 1.06      
19 B2u 1459 1398 0.80      
20 B2u 1371 1314 0.47      
21 B2u 1109 1062 13.22      
22 B2u 349 334 3.79      
23 B3g 3228 3094 0.00      
24 B3g 1673 1603 0.00      
25 B3g 1296 1242 0.00      
26 B3g 645 618 0.00      
27 B3g 445 427 0.00      
28 B3u 843 807 82.22      
29 B3u 518 496 10.44      
30 B3u 162 155 1.37      

Unscaled Zero Point Vibrational Energy (zpe) 18548.5 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 17776.9 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 B3PW91/6-31G**
ABC
0.18879 0.04749 0.03795

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

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 1.215 0.696
C4 0.000 -1.215 0.696
C5 0.000 -1.215 -0.696
C6 0.000 1.215 -0.696
F7 0.000 0.000 2.715
F8 0.000 0.000 -2.715
H9 0.000 2.141 1.260
H10 0.000 -2.141 1.260
H11 0.000 -2.141 -1.260
H12 0.000 2.141 -1.260

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.74101.38911.38912.39742.39741.34504.08602.14392.14393.39203.3920
C22.74102.39742.39741.38911.38914.08601.34503.39203.39202.14392.1439
C31.38912.39742.42922.80021.39292.35623.62161.08463.40273.88452.1650
C41.38912.39742.42921.39292.80022.35623.62163.40271.08462.16503.8845
C52.39741.38912.80021.39292.42923.62162.35623.88452.16501.08463.4027
C62.39741.38911.39292.80022.42923.62162.35622.16503.88453.40271.0846
F71.34504.08602.35622.35623.62163.62165.43092.58872.58874.51564.5156
F84.08601.34503.62163.62162.35622.35625.43094.51564.51562.58872.5887
H92.14393.39201.08463.40273.88452.16502.58874.51564.28224.96902.5207
H102.14393.39203.40271.08462.16503.88452.58874.51564.28222.52074.9690
H113.39202.14393.88452.16501.08463.40274.51562.58874.96902.52074.2822
H123.39202.14392.16503.88453.40271.08464.51562.58872.52074.96904.2822

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 119.029 C1 C3 H9 119.644
C1 C4 C5 119.029 C1 C4 H10 119.644
C2 C5 C4 119.029 C2 C5 H11 119.644
C2 C6 C3 119.029 C2 C6 H12 119.644
C3 C1 C4 121.942 C3 C1 F7 119.029
C3 C6 H12 121.327 C4 C1 F7 119.029
C4 C5 H11 121.327 C5 C2 C6 121.942
C5 C2 F8 119.029 C5 C4 H10 121.327
C6 C2 F8 119.029 C6 C3 H9 121.327
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.358      
2 C 0.358      
3 C -0.179      
4 C -0.179      
5 C -0.179      
6 C -0.179      
7 F -0.296      
8 F -0.296      
9 H 0.148      
10 H 0.148      
11 H 0.148      
12 H 0.148      


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 -45.375 0.000 0.000
y 0.000 -36.385 0.000
z 0.000 0.000 -48.833
Traceless
 xyz
x -2.766 0.000 0.000
y 0.000 10.718 0.000
z 0.000 0.000 -7.953
Polar
3z2-r2-15.905
x2-y2-8.989
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.486 0.000 0.000
y 0.000 10.519 0.000
z 0.000 0.000 10.926


<r2> (average value of r2) Å2
<r2> 254.192
(<r2>)1/2 15.943