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

using model chemistry: CID/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-426.702345
Energy at 298.15K-426.707488
Nuclear repulsion energy340.379006
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 CID/3-21G*
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 3332 3100 0.00      
2 Ag 1742 1621 0.00      
3 Ag 1372 1277 0.00      
4 Ag 1254 1167 0.00      
5 Ag 906 843 0.00      
6 Ag 485 452 0.00      
7 Au 1060 986 0.00      
8 Au 476 443 0.00      
9 B1g 911 847 0.00      
10 B1u 3314 3083 2.39      
11 B1u 1648 1534 196.35      
12 B1u 1341 1248 88.27      
13 B1u 1090 1014 1.43      
14 B1u 788 733 36.06      
15 B2g 1030 958 0.00      
16 B2g 772 718 0.00      
17 B2g 417 388 0.00      
18 B2u 3329 3097 0.12      
19 B2u 1507 1403 0.02      
20 B2u 1265 1177 0.47      
21 B2u 1177 1095 14.14      
22 B2u 345 321 6.53      
23 B3g 3315 3085 0.00      
24 B3g 1700 1582 0.00      
25 B3g 1398 1301 0.00      
26 B3g 698 650 0.00      
27 B3g 455 424 0.00      
28 B3u 937 872 146.12      
29 B3u 563 524 12.93      
30 B3u 173 161 2.99      

Unscaled Zero Point Vibrational Energy (zpe) 19399.2 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 18050.9 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 CID/3-21G*
ABC
0.19147 0.04668 0.03753

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.376
C2 0.000 0.000 -1.376
C3 0.000 1.206 0.695
C4 0.000 -1.206 0.695
C5 0.000 -1.206 -0.695
C6 0.000 1.206 -0.695
F7 0.000 0.000 2.745
F8 0.000 0.000 -2.745
H9 0.000 2.129 1.250
H10 0.000 -2.129 1.250
H11 0.000 -2.129 -1.250
H12 0.000 2.129 -1.250

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.75131.38461.38462.39602.39601.36914.12042.13232.13233.38053.3805
C22.75132.39602.39601.38461.38464.12041.36913.38053.38052.13232.1323
C31.38462.39602.41142.78331.38992.37813.64491.07733.38033.86042.1532
C41.38462.39602.41141.38992.78332.37813.64493.38031.07732.15323.8604
C52.39601.38462.78331.38992.41143.64492.37813.86042.15321.07733.3803
C62.39601.38461.38992.78332.41143.64492.37812.15323.86043.38031.0773
F71.36914.12042.37812.37813.64493.64495.48952.60082.60084.52694.5269
F84.12041.36913.64493.64492.37812.37815.48954.52694.52692.60082.6008
H92.13233.38051.07733.38033.86042.15322.60084.52694.25734.93762.5009
H102.13233.38053.38031.07732.15323.86042.60084.52694.25732.50094.9376
H113.38052.13233.86042.15321.07733.38034.52692.60084.93762.50094.2573
H123.38052.13232.15323.86043.38031.07734.52692.60082.50094.93764.2573

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 119.448 C1 C3 H9 119.509
C1 C4 C5 119.448 C1 C4 H10 119.509
C2 C5 C4 119.448 C2 C5 H11 119.509
C2 C6 C3 119.448 C2 C6 H12 119.509
C3 C1 C4 121.104 C3 C1 F7 119.448
C3 C6 H12 121.043 C4 C1 F7 119.448
C4 C5 H11 121.043 C5 C2 C6 121.104
C5 C2 F8 119.448 C5 C4 H10 121.043
C6 C2 F8 119.448 C6 C3 H9 121.043
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability