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

using model chemistry: QCISD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-1149.617492
Energy at 298.15K 
HF Energy-1148.513964
Nuclear repulsion energy447.963113
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/6-31+G**
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 3281 3102 0.00      
2 Ag 1676 1585 0.00      
3 Ag 1226 1159 0.00      
4 Ag 1140 1078 0.00      
5 Ag 772 730 0.00      
6 Ag 335 316 0.00      
7 Au 928 877 0.00      
8 Au 393 371 0.00      
9 B1g 825 780 0.00      
10 B1u 3265 3087 2.26      
11 B1u 1552 1467 92.24      
12 B1u 1147 1085 94.41      
13 B1u 1036 980 47.53      
14 B1u 561 531 23.93      
15 B2g 877 829 0.00      
16 B2g 279 264 0.00      
17 B2g 436i 412i 0.00      
18 B2u 3280 3101 4.12      
19 B2u 1453 1374 5.62      
20 B2u 1278 1208 0.43      
21 B2u 1147 1084 3.34      
22 B2u 222 210 0.84      
23 B3g 3266 3088 0.00      
24 B3g 1657 1567 0.00      
25 B3g 1344 1271 0.00      
26 B3g 645 609 0.00      
27 B3g 356 337 0.00      
28 B3u 796 753 68.41      
29 B3u 409 387 12.96      
30 B3u 98 92 0.29      

Unscaled Zero Point Vibrational Energy (zpe) 17403.2 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 16453.0 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/6-31+G**
ABC
0.18879 0.02211 0.01979

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.388
C2 0.000 0.000 -1.388
C3 0.000 1.214 0.698
C4 0.000 -1.214 0.698
C5 0.000 -1.214 -0.698
C6 0.000 1.214 -0.698
Cl7 0.000 0.000 3.133
Cl8 0.000 0.000 -3.133
H9 0.000 2.148 1.243
H10 0.000 -2.148 1.243
H11 0.000 -2.148 -1.243
H12 0.000 2.148 -1.243

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.77691.39601.39602.41412.41411.74454.52142.15282.15283.39703.3970
C22.77692.41412.41411.39601.39604.52141.74453.39703.39702.15282.1528
C31.39602.41412.42712.80051.39702.72024.01901.08163.40543.88212.1549
C41.39602.41412.42711.39702.80052.72024.01903.40541.08162.15493.8821
C52.41411.39602.80051.39702.42714.01902.72023.88212.15491.08163.4054
C62.41411.39601.39702.80052.42714.01902.72022.15493.88213.40541.0816
Cl71.74454.52142.72022.72024.01904.01906.26592.86082.86084.87504.8750
Cl84.52141.74454.01904.01902.72022.72026.26594.87504.87502.86082.8608
H92.15283.39701.08163.40543.88212.15492.86084.87504.29594.96372.4867
H102.15283.39703.40541.08162.15493.88212.86084.87504.29592.48674.9637
H113.39702.15283.88212.15491.08163.40544.87502.86084.96372.48674.2959
H123.39702.15282.15493.88213.40541.08164.87502.86082.48674.96374.2959

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 119.619 C1 C3 H9 120.134
C1 C4 C5 119.619 C1 C4 H10 120.134
C2 C5 C4 119.619 C2 C5 H11 120.134
C2 C6 C3 119.619 C2 C6 H12 120.134
C3 C1 C4 120.762 C3 C1 Cl7 119.619
C3 C6 H12 120.247 C4 C1 Cl7 119.619
C4 C5 H11 120.247 C5 C2 C6 120.762
C5 C2 Cl8 119.619 C5 C4 H10 120.247
C6 C2 Cl8 119.619 C6 C3 H9 120.247
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability