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

using model chemistry: MP2/CEP-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 MP2/CEP-31G*
 hartrees
Energy at 0K-65.593463
Energy at 298.15K-65.597480
HF Energy-64.611154
Nuclear repulsion energy160.602029
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 MP2/CEP-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 3240 3076 0.00      
2 Ag 1640 1557 0.00      
3 Ag 1196 1136 0.00      
4 Ag 1130 1073 0.00      
5 Ag 755 716 0.00      
6 Ag 326 309 0.00      
7 Au 946 898 0.00      
8 Au 414 393 0.00      
9 B1g 840 798 0.00      
10 B1u 3218 3055 0.93      
11 B1u 1506 1430 110.44      
12 B1u 1125 1068 87.35      
13 B1u 1010 959 68.59      
14 B1u 560 532 24.13      
15 B2g 909 863 0.00      
16 B2g 596 566 0.00      
17 B2g 297 282 0.00      
18 B2u 3239 3075 2.16      
19 B2u 1487 1412 0.25      
20 B2u 1408 1337 3.93      
21 B2u 1121 1064 6.83      
22 B2u 216 205 0.96      
23 B3g 3220 3057 0.00      
24 B3g 1635 1552 0.00      
25 B3g 1307 1241 0.00      
26 B3g 618 586 0.00      
27 B3g 342 324 0.00      
28 B3u 828 786 91.72      
29 B3u 474 450 23.92      
30 B3u 104 98 0.38      

Unscaled Zero Point Vibrational Energy (zpe) 17852.3 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 16949.0 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 MP2/CEP-31G*
ABC
0.18172 0.02173 0.01941

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.405
C2 0.000 0.000 -1.405
C3 0.000 1.238 0.709
C4 0.000 -1.238 0.709
C5 0.000 -1.238 -0.709
C6 0.000 1.238 -0.709
Cl7 0.000 0.000 3.159
Cl8 0.000 0.000 -3.159
H9 0.000 2.181 1.264
H10 0.000 -2.181 1.264
H11 0.000 -2.181 -1.264
H12 0.000 2.181 -1.264

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.81071.42041.42042.45052.45051.75344.56412.18572.18573.44723.4472
C22.81072.45052.45051.42041.42044.56411.75343.44723.44722.18572.1857
C31.42042.45052.47642.85401.41872.74464.06151.09403.46403.94792.1871
C41.42042.45052.47641.41872.85402.74464.06153.46401.09402.18713.9479
C52.45051.42042.85401.41872.47644.06152.74463.94792.18711.09403.4640
C62.45051.42041.41872.85402.47644.06152.74462.18713.94793.46401.0940
Cl71.75344.56412.74462.74464.06154.06156.31752.88922.88924.93144.9314
Cl84.56411.75344.06154.06152.74462.74466.31754.93144.93142.88922.8892
H92.18573.44721.09403.46403.94792.18712.88924.93144.36235.04192.5280
H102.18573.44723.46401.09402.18713.94792.88924.93144.36232.52805.0419
H113.44722.18573.94792.18711.09403.46404.93142.88925.04192.52804.3623
H123.44722.18572.18713.94793.46401.09404.93142.88922.52805.04194.3623

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 119.340 C1 C3 H9 120.197
C1 C4 C5 119.340 C1 C4 H10 120.197
C2 C5 C4 119.340 C2 C5 H11 120.197
C2 C6 C3 119.340 C2 C6 H12 120.197
C3 C1 C4 121.321 C3 C1 Cl7 119.340
C3 C6 H12 120.464 C4 C1 Cl7 119.340
C4 C5 H11 120.464 C5 C2 C6 121.321
C5 C2 Cl8 119.340 C5 C4 H10 120.464
C6 C2 Cl8 119.340 C6 C3 H9 120.464
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability