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

using model chemistry: MP2/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 MP2/TZVP
 hartrees
Energy at 0K-429.763485
Energy at 298.15K 
HF Energy-428.551385
Nuclear repulsion energy341.477268
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 MP2/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 3264 3094 0.00      
2 Ag 1662 1575 0.00      
3 Ag 1286 1219 0.00      
4 Ag 1173 1112 0.00      
5 Ag 867 822 0.00      
6 Ag 455 432 0.00      
7 Au 681 646 0.00      
8 Au 193 182 0.00      
9 B1g 727 689 0.00      
10 B1u 3249 3080 2.43      
11 B1u 1551 1470 250.72      
12 B1u 1234 1169 188.04      
13 B1u 1026 972 5.61      
14 B1u 751 712 56.03      
15 B2g 745 706 0.00      
16 B2g 377 358 0.00      
17 B2g 1182i 1121i 0.00      
18 B2u 3263 3093 0.00      
19 B2u 1458 1382 1.26      
20 B2u 1426 1351 0.04      
21 B2u 1115 1057 12.32      
22 B2u 351 332 5.05      
23 B3g 3252 3082 0.00      
24 B3g 1661 1575 0.00      
25 B3g 1310 1242 0.00      
26 B3g 645 611 0.00      
27 B3g 445 422 0.00      
28 B3u 741 702 93.51      
29 B3u 444 421 9.62      
30 B3u 137 130 1.33      

Unscaled Zero Point Vibrational Energy (zpe) 17152.4 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 16258.8 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 MP2/TZVP
ABC
0.18900 0.04752 0.03797

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.365
C2 0.000 0.000 -1.365
C3 0.000 1.214 0.696
C4 0.000 -1.214 0.696
C5 0.000 -1.214 -0.696
C6 0.000 1.214 -0.696
F7 0.000 0.000 2.716
F8 0.000 0.000 -2.716
H9 0.000 2.138 1.259
H10 0.000 -2.138 1.259
H11 0.000 -2.138 -1.259
H12 0.000 2.138 -1.259

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.73051.38631.38632.39262.39261.35114.08152.14042.14043.38473.3847
C22.73052.39262.39261.38631.38634.08151.35113.38473.38472.14042.1404
C31.38632.39262.42852.79941.39262.35693.62221.08143.39893.88062.1624
C41.38632.39262.42851.39262.79942.35693.62223.39891.08142.16243.8806
C52.39261.38632.79941.39262.42853.62222.35693.88062.16241.08143.3989
C62.39261.38631.39262.79942.42853.62222.35692.16243.88063.39891.0814
F71.35114.08152.35692.35693.62223.62225.43262.58732.58734.51364.5136
F84.08151.35113.62223.62222.35692.35695.43264.51364.51362.58732.5873
H92.14043.38471.08143.39893.88062.16242.58734.51364.27564.96192.5178
H102.14043.38473.39891.08142.16243.88062.58734.51364.27562.51784.9619
H113.38472.14043.88062.16241.08143.39894.51362.58734.96192.51784.2756
H123.38472.14042.16243.88063.39891.08144.51362.58732.51784.96194.2756

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 118.851 C1 C3 H9 119.799
C1 C4 C5 118.851 C1 C4 H10 119.799
C2 C5 C4 118.851 C2 C5 H11 119.799
C2 C6 C3 118.851 C2 C6 H12 119.799
C3 C1 C4 122.297 C3 C1 F7 118.851
C3 C6 H12 121.350 C4 C1 F7 118.851
C4 C5 H11 121.350 C5 C2 C6 122.297
C5 C2 F8 118.851 C5 C4 H10 121.350
C6 C2 F8 118.851 C6 C3 H9 121.350
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability