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All results from a given calculation for C6H4F2 (orthodifluorobenzene)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-426.699616
Energy at 298.15K-426.704722
Nuclear repulsion energy346.278364
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/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 A1 3322 3104 0.34      
2 A1 3302 3085 6.67      
3 A1 1707 1595 21.27      
4 A1 1633 1526 122.16      
5 A1 1385 1294 51.10      
6 A1 1306 1220 2.30      
7 A1 1234 1153 0.84      
8 A1 1092 1020 5.15      
9 A1 809 756 23.02      
10 A1 624 583 4.34      
11 A1 285 267 0.72      
12 A2 1045 977 0.00      
13 A2 952 890 0.00      
14 A2 784 732 0.00      
15 A2 606 566 0.00      
16 A2 205 192 0.00      
17 B1 1038 970 17.13      
18 B1 837 782 115.58      
19 B1 514 480 2.47      
20 B1 325 304 0.23      
21 B2 3316 3099 1.14      
22 B2 3286 3071 1.29      
23 B2 1721 1608 3.36      
24 B2 1568 1465 11.96      
25 B2 1374 1284 4.13      
26 B2 1311 1225 21.70      
27 B2 1186 1108 14.73      
28 B2 921 861 12.36      
29 B2 570 533 3.31      
30 B2 457 427 0.95      

Unscaled Zero Point Vibrational Energy (zpe) 19357.3 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 18087.4 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/3-21G*
ABC
0.10837 0.07342 0.04377

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.692 -0.530
C2 0.000 -0.692 -0.530
C3 0.000 -1.385 0.664
C4 0.000 -0.695 1.871
C5 0.000 0.695 1.871
C6 0.000 1.385 0.664
F7 0.000 1.360 -1.718
F8 0.000 -1.360 -1.718
H9 0.000 -2.461 0.632
H10 0.000 -1.240 2.801
H11 0.000 1.240 2.801
H12 0.000 2.461 0.632

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C11.38322.39582.77302.40121.38141.36292.37083.36003.85103.37642.1170
C21.38321.38142.40122.77302.39582.37081.36292.11703.37643.85103.3600
C32.39581.38141.38962.40512.77013.63492.38241.07622.14173.38493.8460
C42.77302.40121.38961.39102.40514.13593.64982.15651.07802.14763.3906
C52.40122.77302.40511.39101.38963.64984.13593.39062.14761.07802.1565
C61.38142.39582.77012.40511.38962.38243.63493.84603.38492.14171.0762
F71.36292.37083.63494.13593.64982.38242.72074.48605.21394.52072.5951
F82.37081.36292.38243.64984.13593.63492.72072.59514.52075.21394.4860
H93.36002.11701.07622.15653.39063.84604.48602.59512.48884.28964.9216
H103.85103.37642.14171.07802.14763.38495.21394.52072.48882.48024.2896
H113.37643.85103.38492.14761.07802.14174.52075.21394.28962.48022.4888
H122.11703.36003.84603.39062.15651.07622.59514.48604.92164.28962.4888

picture of orthodifluorobenzene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 120.132 C1 C2 F8 119.385
C1 C6 C5 120.118 C1 C6 H12 118.424
C2 C1 C6 120.132 C2 C1 F7 119.385
C2 C3 C4 120.118 C2 C3 H9 118.424
C3 C2 F8 120.482 C3 C4 C5 119.750
C3 C4 H10 119.905 C4 C3 H9 121.458
C4 C5 C6 119.750 C4 C5 H11 120.346
C5 C4 H10 120.346 C5 C6 H12 121.458
C6 C1 F7 120.482 C6 C5 H11 119.905
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability