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

using model chemistry: MP3=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP3=FULL/6-31+G**
 hartrees
Energy at 0K-429.610193
Energy at 298.15K-429.614825
HF Energy-428.425448
Nuclear repulsion energy340.941310
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 MP3=FULL/6-31+G**
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 3321 3094 0.00      
2 Ag 1715 1598 0.00      
3 Ag 1313 1223 0.00      
4 Ag 1194 1112 0.00      
5 Ag 884 824 0.00      
6 Ag 460 428 0.00      
7 Au 925 862 0.00      
8 Au 415 387 0.00      
9 B1g 818 762 0.00      
10 B1u 3307 3081 3.47      
11 B1u 1597 1488 246.24      
12 B1u 1265 1178 190.50      
13 B1u 1048 977 6.71      
14 B1u 757 705 59.27      
15 B2g 875 815 0.00      
16 B2g 499 465 0.00      
17 B2g 355 331 0.00      
18 B2u 3321 3093 0.30      
19 B2u 1485 1383 0.72      
20 B2u 1312 1223 0.34      
21 B2u 1131 1054 11.66      
22 B2u 351 327 5.95      
23 B3g 3308 3082 0.00      
24 B3g 1711 1594 0.00      
25 B3g 1340 1248 0.00      
26 B3g 655 610 0.00      
27 B3g 450 419 0.00      
28 B3u 837 780 99.09      
29 B3u 505 471 14.70      
30 B3u 159 148 2.13      

Unscaled Zero Point Vibrational Energy (zpe) 18656.0 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 17380.0 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 MP3=FULL/6-31+G**
ABC
0.18813 0.04741 0.03787

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31+G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.360
C2 0.000 0.000 -1.360
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 2.720
F8 0.000 0.000 -2.720
H9 0.000 2.140 1.254
H10 0.000 -2.140 1.254
H11 0.000 -2.140 -1.254
H12 0.000 2.140 -1.254

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.71981.38601.38602.38972.38971.35964.07942.14272.14273.37793.3779
C22.71982.38972.38971.38601.38604.07941.35963.37793.37792.14272.1427
C31.38602.38972.43412.80471.39342.36073.62651.07803.40303.88252.1576
C41.38602.38972.43411.39342.80472.36073.62653.40301.07802.15763.8825
C52.38971.38602.80471.39342.43413.62652.36073.88252.15761.07803.4030
C62.38971.38601.39342.80472.43413.62652.36072.15763.88253.40301.0780
F71.35964.07942.36072.36073.62653.62655.43902.59402.59404.51284.5128
F84.07941.35963.62653.62652.36072.36075.43904.51284.51282.59402.5940
H92.14273.37791.07803.40303.88252.15762.59404.51284.28014.96042.5071
H102.14273.37793.40301.07802.15763.88252.59404.51284.28012.50714.9604
H113.37792.14273.88252.15761.07803.40304.51282.59404.96042.50714.2801
H123.37792.14272.15763.88253.40301.07804.51282.59402.50714.96044.2801

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 118.587 C1 C3 H9 120.309
C1 C4 C5 118.587 C1 C4 H10 120.309
C2 C5 C4 118.587 C2 C5 H11 120.309
C2 C6 C3 118.587 C2 C6 H12 120.309
C3 C1 C4 122.826 C3 C1 F7 118.587
C3 C6 H12 121.104 C4 C1 F7 118.587
C4 C5 H11 121.104 C5 C2 C6 122.826
C5 C2 F8 118.587 C5 C4 H10 121.104
C6 C2 F8 118.587 C6 C3 H9 121.104
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability