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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-1149.602428
Energy at 298.15K-1149.606519
HF Energy-1148.508053
Nuclear repulsion energy448.288141
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
4/u)
Dep P Dep U
1 Ag 3287 3094 0.00      
2 Ag 1685 1586 0.00      
3 Ag 1228 1156 0.00      
4 Ag 1146 1079 0.00      
5 Ag 774 728 0.00      
6 Ag 335 315 0.00      
7 Au 939 884 0.00      
8 Au 410 386 0.00      
9 B1g 836 787 0.00      
10 B1u 3271 3079 2.33      
11 B1u 1558 1467 90.23      
12 B1u 1149 1082 89.87      
13 B1u 1036 975 48.44      
14 B1u 563 530 23.21      
15 B2g 901 848 0.00      
16 B2g 553 521 0.00      
17 B2g 298 280 0.00      
18 B2u 3285 3093 4.62      
19 B2u 1460 1375 6.03      
20 B2u 1278 1203 0.11      
21 B2u 1150 1082 3.00      
22 B2u 223 210 1.05      
23 B3g 3272 3080 0.00      
24 B3g 1665 1568 0.00      
25 B3g 1345 1266 0.00      
26 B3g 646 608 0.00      
27 B3g 360 339 0.00      
28 B3u 815 767 54.44      
29 B3u 483 455 11.52      
30 B3u 103 97 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 18025.8 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 16969.5 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
0.18906 0.02215 0.01982

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 2.146 1.243
H10 0.000 -2.146 1.243
H11 0.000 -2.146 -1.243
H12 0.000 2.146 -1.243

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.77261.39471.39472.41102.41101.74454.51712.15082.15083.39413.3941
C22.77262.41102.41101.39471.39474.51711.74453.39413.39412.15082.1508
C31.39472.41102.42562.79811.39502.71884.01581.08113.40283.87922.1535
C41.39472.41102.42561.39502.79812.71884.01583.40281.08112.15353.8792
C52.41101.39472.79811.39502.42564.01582.71883.87922.15351.08113.4028
C62.41101.39471.39502.79812.42564.01582.71882.15353.87923.40281.0811
Cl71.74454.51712.71882.71884.01584.01586.26162.85802.85804.87214.8721
Cl84.51711.74454.01584.01582.71882.71886.26164.87214.87212.85802.8580
H92.15083.39411.08113.40283.87922.15352.85804.87214.29204.96032.4865
H102.15083.39413.40281.08112.15353.87922.85804.87214.29202.48654.9603
H113.39412.15083.87922.15351.08113.40284.87212.85804.96032.48654.2920
H123.39412.15082.15353.87923.40281.08114.87212.85802.48654.96034.2920

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 119.593 C1 C3 H9 120.088
C1 C4 C5 119.593 C1 C4 H10 120.088
C2 C5 C4 119.593 C2 C5 H11 120.088
C2 C6 C3 119.593 C2 C6 H12 120.088
C3 C1 C4 120.814 C3 C1 Cl7 119.593
C3 C6 H12 120.319 C4 C1 Cl7 119.593
C4 C5 H11 120.319 C5 C2 C6 120.814
C5 C2 Cl8 119.593 C5 C4 H10 120.319
C6 C2 Cl8 119.593 C6 C3 H9 120.319
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability