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

using model chemistry: B2PLYP=FULL/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B2PLYP=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-430.427274
Energy at 298.15K 
HF Energy-429.974688
Nuclear repulsion energy342.361606
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 B2PLYP=FULL/6-31G(2df,p)
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 3247 3247 0.00 257.24 0.16 0.27
2 Ag 1665 1665 0.00 5.92 0.68 0.81
3 Ag 1314 1314 0.00 14.68 0.15 0.26
4 Ag 1164 1164 0.00 8.78 0.69 0.82
5 Ag 872 872 0.00 32.99 0.08 0.15
6 Ag 454 454 0.00 4.31 0.42 0.59
7 Au 948 948 0.00 0.00 0.00 0.00
8 Au 437 437 0.00 0.00 0.00 0.00
9 B1g 832 832 0.00 3.34 0.75 0.86
10 B1u 3232 3232 5.02 0.00 0.00 0.00
11 B1u 1554 1554 252.60 0.00 0.00 0.00
12 B1u 1261 1261 146.84 0.00 0.00 0.00
13 B1u 1024 1024 1.59 0.00 0.00 0.00
14 B1u 757 757 45.68 0.00 0.00 0.00
15 B2g 946 946 0.00 1.78 0.75 0.86
16 B2g 719 719 0.00 0.10 0.75 0.86
17 B2g 389 389 0.00 3.59 0.75 0.86
18 B2u 3246 3246 0.69 0.00 0.00 0.00
19 B2u 1445 1445 0.22 0.00 0.00 0.00
20 B2u 1360 1360 0.91 0.00 0.00 0.00
21 B2u 1106 1106 12.21 0.00 0.00 0.00
22 B2u 350 350 3.75 0.00 0.00 0.00
23 B3g 3234 3234 0.00 115.78 0.75 0.86
24 B3g 1653 1653 0.00 6.03 0.75 0.86
25 B3g 1287 1287 0.00 2.56 0.75 0.86
26 B3g 646 646 0.00 6.66 0.75 0.86
27 B3g 445 445 0.00 0.06 0.75 0.86
28 B3u 861 861 65.58 0.00 0.00 0.00
29 B3u 532 532 10.05 0.00 0.00 0.00
30 B3u 164 164 1.30 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18571.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 18571.3 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 B2PLYP=FULL/6-31G(2df,p)
ABC
0.18988 0.04775 0.03815

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G(2df,p)

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.370
C2 0.000 0.000 -1.370
C3 0.000 1.211 0.696
C4 0.000 -1.211 0.696
C5 0.000 -1.211 -0.696
C6 0.000 1.211 -0.696
F7 0.000 0.000 2.707
F8 0.000 0.000 -2.707
H9 0.000 2.135 1.258
H10 0.000 -2.135 1.258
H11 0.000 -2.135 -1.258
H12 0.000 2.135 -1.258

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.74081.38641.38642.39492.39491.33634.07712.13772.13773.38613.3861
C22.74082.39492.39491.38641.38644.07711.33633.38613.38612.13772.1377
C31.38642.39492.42232.79341.39122.34763.61141.08143.39283.87452.1610
C41.38642.39492.42231.39122.79342.34763.61143.39281.08142.16103.8745
C52.39491.38642.79341.39122.42233.61142.34763.87452.16101.08143.3928
C62.39491.38641.39122.79342.42233.61142.34762.16103.87453.39281.0814
F71.33634.07712.34762.34763.61143.61145.41342.57992.57994.50294.5029
F84.07711.33633.61143.61142.34762.34765.41344.50294.50292.57992.5799
H92.13773.38611.08143.39283.87452.16102.57994.50294.26954.95572.5161
H102.13773.38613.39281.08142.16103.87452.57994.50294.26952.51614.9557
H113.38612.13773.87452.16101.08143.39284.50292.57994.95572.51614.2695
H123.38612.13772.16103.87453.39281.08144.50292.57992.51614.95574.2695

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 119.124 C1 C3 H9 119.538
C1 C4 C5 119.124 C1 C4 H10 119.538
C2 C5 C4 119.124 C2 C5 H11 119.538
C2 C6 C3 119.124 C2 C6 H12 119.538
C3 C1 C4 121.752 C3 C1 F7 119.124
C3 C6 H12 121.338 C4 C1 F7 119.124
C4 C5 H11 121.338 C5 C2 C6 121.752
C5 C2 F8 119.124 C5 C4 H10 121.338
C6 C2 F8 119.124 C6 C3 H9 121.338
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability