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All results from a given calculation for C6H4F2 (orthodifluorobenzene)

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-426.844868
Energy at 298.15K-426.849693
Nuclear repulsion energy342.969352
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 QCISD/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 3201 3102 0.64      
2 A1 3180 3082 8.28      
3 A1 1618 1568 18.69      
4 A1 1560 1512 95.50      
5 A1 1325 1284 42.31      
6 A1 1253 1214 1.88      
7 A1 1188 1151 0.93      
8 A1 1042 1010 4.46      
9 A1 769 746 17.64      
10 A1 597 578 3.62      
11 A1 273 265 0.64      
12 A2 957 927 0.00      
13 A2 884 857 0.00      
14 A2 720 698 0.00      
15 A2 569 552 0.00      
16 A2 194 188 0.00      
17 B1 958 929 15.29      
18 B1 783 759 100.02      
19 B1 483 468 2.37      
20 B1 307 297 0.10      
21 B2 3196 3098 2.71      
22 B2 3164 3067 1.42      
23 B2 1634 1584 2.98      
24 B2 1502 1456 8.87      
25 B2 1318 1277 3.38      
26 B2 1254 1215 17.16      
27 B2 1136 1101 12.74      
28 B2 885 858 10.61      
29 B2 546 530 2.94      
30 B2 438 425 0.97      

Unscaled Zero Point Vibrational Energy (zpe) 18465.9 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 17897.1 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 QCISD/3-21G
ABC
0.10633 0.07201 0.04293

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.701 -0.538
C2 0.000 -0.701 -0.538
C3 0.000 -1.400 0.672
C4 0.000 -0.703 1.891
C5 0.000 0.703 1.891
C6 0.000 1.400 0.672
F7 0.000 1.376 -1.736
F8 0.000 -1.376 -1.736
H9 0.000 -2.486 0.641
H10 0.000 -1.253 2.831
H11 0.000 1.253 2.831
H12 0.000 2.486 0.641

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C11.40152.42442.80602.42971.39781.37482.39733.39853.89503.41462.1402
C21.40151.39782.42972.80602.42442.39731.37482.14023.41463.89503.3985
C32.42441.39781.40452.43072.79983.67472.40811.08702.16433.42043.8865
C42.80602.42971.40451.40572.43074.18083.68932.17811.08902.16973.4256
C52.42972.80602.43071.40571.40453.68934.18083.42562.16971.08902.1781
C61.39782.42442.79982.43071.40452.40813.67473.88653.42042.16431.0870
F71.37482.39733.67474.18083.68932.40812.75184.53535.26974.56902.6239
F82.39731.37482.40813.68934.18083.67472.75182.62394.56905.26974.5353
H93.39852.14021.08702.17813.42563.88654.53532.62392.51374.33344.9730
H103.89503.41462.16431.08902.16973.42045.26974.56902.51372.50544.3334
H113.41463.89503.42042.16971.08902.16434.56905.26974.33342.50542.5137
H122.14023.39853.88653.42562.17811.08702.62394.53534.97304.33342.5137

picture of orthodifluorobenzene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 120.012 C1 C2 F8 119.409
C1 C6 C5 120.234 C1 C6 H12 118.390
C2 C1 C6 120.012 C2 C1 F7 119.409
C2 C3 C4 120.234 C2 C3 H9 118.390
C3 C2 F8 120.579 C3 C4 C5 119.755
C3 C4 H10 119.920 C4 C3 H9 121.376
C4 C5 C6 119.755 C4 C5 H11 120.325
C5 C4 H10 120.325 C5 C6 H12 121.376
C6 C1 F7 120.579 C6 C5 H11 119.920
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability