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All results from a given calculation for C6H4Cl2 (1,4-dichlorobenzene)

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-1149.570787
Energy at 298.15K-1149.574848
HF Energy-1148.500347
Nuclear repulsion energy448.049493
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3239 3085 0.00      
2 Ag 1679 1599 0.00      
3 Ag 1229 1170 0.00      
4 Ag 1145 1090 0.00      
5 Ag 774 737 0.00      
6 Ag 335 319 0.00      
7 Au 920 876 0.00      
8 Au 411 392 0.00      
9 B1g 827 787 0.00      
10 B1u 3224 3070 1.98      
11 B1u 1551 1477 99.27      
12 B1u 1146 1091 83.58      
13 B1u 1037 987 50.99      
14 B1u 562 535 24.09      
15 B2g 884 842 0.00      
16 B2g 563 536 0.00      
17 B2g 298 284 0.00      
18 B2u 3238 3083 3.59      
19 B2u 1457 1387 7.11      
20 B2u 1277 1216 0.22      
21 B2u 1151 1096 3.53      
22 B2u 224 213 1.13      
23 B3g 3225 3071 0.00      
24 B3g 1663 1584 0.00      
25 B3g 1339 1275 0.00      
26 B3g 646 615 0.00      
27 B3g 361 344 0.00      
28 B3u 808 770 61.97      
29 B3u 483 460 12.89      
30 B3u 103 98 0.63      

Unscaled Zero Point Vibrational Energy (zpe) 17898.9 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 17045.1 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/6-31G*
ABC
0.18869 0.02214 0.01981

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.386
C2 0.000 0.000 -1.386
C3 0.000 1.213 0.698
C4 0.000 -1.213 0.698
C5 0.000 -1.213 -0.698
C6 0.000 1.213 -0.698
Cl7 0.000 0.000 3.131
Cl8 0.000 0.000 -3.131
H9 0.000 2.152 1.247
H10 0.000 -2.152 1.247
H11 0.000 -2.152 -1.247
H12 0.000 2.152 -1.247

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.77171.39491.39492.41122.41121.74554.51712.15642.15643.40033.4003
C22.77172.41122.41121.39491.39494.51711.74553.40033.40032.15642.1564
C31.39492.41122.42682.79951.39562.71924.01671.08733.40983.88682.1593
C41.39492.41122.42681.39562.79952.71924.01673.40981.08732.15933.8868
C52.41121.39492.79951.39562.42684.01672.71923.88682.15931.08733.4098
C62.41121.39491.39562.79952.42684.01672.71922.15933.88683.40981.0873
Cl71.74554.51712.71922.71924.01674.01676.26262.86042.86044.87844.8784
Cl84.51711.74554.01674.01672.71922.71926.26264.87844.87842.86042.8604
H92.15643.40031.08733.40983.88682.15932.86044.87844.30394.97412.4937
H102.15643.40033.40981.08732.15933.88682.86044.87844.30392.49374.9741
H113.40032.15643.88682.15931.08733.40984.87842.86044.97412.49374.3039
H123.40032.15642.15933.88683.40981.08734.87842.86042.49374.97414.3039

picture of 1,4-dichlorobenzene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 119.555 C1 C3 H9 120.116
C1 C4 C5 119.555 C1 C4 H10 120.116
C2 C5 C4 119.555 C2 C5 H11 120.116
C2 C6 C3 119.555 C2 C6 H12 120.116
C3 C1 C4 120.891 C3 C1 Cl7 119.555
C3 C6 H12 120.329 C4 C1 Cl7 119.555
C4 C5 H11 120.329 C5 C2 C6 120.891
C5 C2 Cl8 119.555 C5 C4 H10 120.329
C6 C2 Cl8 119.555 C6 C3 H9 120.329
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability