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

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-429.293639
Energy at 298.15K-429.298650
Nuclear repulsion energy343.324148
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 CISD/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 3364 3114 0.00      
2 Ag 1793 1660 0.00      
3 Ag 1382 1279 0.00      
4 Ag 1234 1142 0.00      
5 Ag 921 852 0.00      
6 Ag 477 442 0.00      
7 Au 1005 930 0.00      
8 Au 453 419 0.00      
9 B1g 876 811 0.00      
10 B1u 3349 3100 4.62      
11 B1u 1660 1537 276.78      
12 B1u 1327 1229 160.81      
13 B1u 1086 1005 4.33      
14 B1u 787 729 53.61      
15 B2g 958 887 0.00      
16 B2g 675 625 0.00      
17 B2g 401 371 0.00      
18 B2u 3363 3113 1.07      
19 B2u 1541 1427 0.16      
20 B2u 1323 1225 2.20      
21 B2u 1168 1081 14.62      
22 B2u 364 337 5.57      
23 B3g 3351 3102 0.00      
24 B3g 1778 1646 0.00      
25 B3g 1379 1277 0.00      
26 B3g 680 630 0.00      
27 B3g 467 433 0.00      
28 B3u 900 833 104.49      
29 B3u 546 506 8.67      
30 B3u 172 159 2.19      

Unscaled Zero Point Vibrational Energy (zpe) 19389.0 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 17950.4 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 CISD/6-31G*
ABC
0.19111 0.04802 0.03838

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

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 1.207 0.693
C4 0.000 -1.207 0.693
C5 0.000 -1.207 -0.693
C6 0.000 1.207 -0.693
F7 0.000 0.000 2.701
F8 0.000 0.000 -2.701
H9 0.000 2.127 1.253
H10 0.000 -2.127 1.253
H11 0.000 -2.127 -1.253
H12 0.000 2.127 -1.253

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.72041.37961.37962.38162.38161.34104.06152.13012.13013.37003.3700
C22.72042.38162.38161.37961.37964.06151.34103.37003.37002.13012.1301
C31.37962.38162.41462.78381.38532.34353.60221.07753.38153.86102.1525
C41.37962.38162.41461.38532.78382.34353.60223.38151.07752.15253.8610
C52.38161.37962.78381.38532.41463.60222.34353.86102.15251.07753.3815
C62.38161.37961.38532.78382.41463.60222.34352.15253.86103.38151.0775
F71.34104.06152.34352.34353.60223.60225.40252.57342.57344.49054.4905
F84.06151.34103.60223.60222.34352.34355.40254.49054.49052.57342.5734
H92.13013.37001.07753.38153.86102.15252.57344.49054.25484.93832.5067
H102.13013.37003.38151.07752.15253.86102.57344.49054.25482.50674.9383
H113.37002.13013.86102.15251.07753.38154.49052.57344.93832.50674.2548
H123.37002.13012.15253.86103.38151.07754.49052.57342.50674.93834.2548

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 118.940 C1 C3 H9 119.701
C1 C4 C5 118.940 C1 C4 H10 119.701
C2 C5 C4 118.940 C2 C5 H11 119.701
C2 C6 C3 118.940 C2 C6 H12 119.701
C3 C1 C4 122.120 C3 C1 F7 118.940
C3 C6 H12 121.359 C4 C1 F7 118.940
C4 C5 H11 121.359 C5 C2 C6 122.120
C5 C2 F8 118.940 C5 C4 H10 121.359
C6 C2 F8 118.940 C6 C3 H9 121.359
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability