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

using model chemistry: MP2/CEP-121G

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-121G
 hartrees
Energy at 0K-65.091851
Energy at 298.15K 
HF Energy-64.489084
Nuclear repulsion energy158.313443
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-121G
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 3173 3096 0.00      
2 Ag 1568 1530 0.00      
3 Ag 1204 1175 0.00      
4 Ag 1061 1035 0.00      
5 Ag 723 705 0.00      
6 Ag 308 301 0.00      
7 Au 603 589 0.00      
8 Au 281 274 0.00      
9 B1g 701 684 0.00      
10 B1u 3153 3078 1.89      
11 B1u 1478 1442 73.66      
12 B1u 1084 1058 79.54      
13 B1u 998 974 74.42      
14 B1u 503 491 20.52      
15 B2g 742 724 0.00      
16 B2g 252 246 0.00      
17 B2g 1102i 1076i 0.00      
18 B2u 3170 3094 11.37      
19 B2u 1383 1350 5.94      
20 B2u 1329 1297 0.09      
21 B2u 1109 1082 5.59      
22 B2u 204 199 1.47      
23 B3g 3154 3078 0.00      
24 B3g 1567 1530 0.00      
25 B3g 1310 1278 0.00      
26 B3g 625 610 0.00      
27 B3g 333 325 0.00      
28 B3u 613 598 99.25      
29 B3u 242 236 0.21      
30 B3u 89 87 0.65      

Unscaled Zero Point Vibrational Energy (zpe) 15928.0 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 15545.7 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-121G
ABC
0.18023 0.02070 0.01857

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.406
C2 0.000 0.000 -1.406
C3 0.000 1.244 0.714
C4 0.000 -1.244 0.714
C5 0.000 -1.244 -0.714
C6 0.000 1.244 -0.714
Cl7 0.000 0.000 3.244
Cl8 0.000 0.000 -3.244
H9 0.000 2.185 1.268
H10 0.000 -2.185 1.268
H11 0.000 -2.185 -1.268
H12 0.000 2.185 -1.268

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.81181.42341.42342.45812.45811.83784.64972.18962.18963.45293.4529
C22.81182.45812.45811.42341.42344.64971.83783.45293.45292.18962.1896
C31.42342.45812.48802.86891.42842.81894.14891.09183.47363.96072.1939
C41.42342.45812.48801.42842.86892.81894.14893.47361.09182.19393.9607
C52.45811.42342.86891.42842.48804.14892.81893.96072.19391.09183.4736
C62.45811.42341.42842.86892.48804.14892.81892.19393.96073.47361.0918
Cl71.83784.64972.81892.81894.14894.14896.48752.94622.94625.01275.0127
Cl84.64971.83784.14894.14892.81892.81896.48755.01275.01272.94622.9462
H92.18963.45291.09183.47363.96072.19392.94625.01274.37045.05242.5352
H102.18963.45293.47361.09182.19393.96072.94625.01274.37042.53525.0524
H113.45292.18963.96072.19391.09183.47365.01272.94625.05242.53524.3704
H123.45292.18962.19393.96073.47361.09185.01272.94622.53525.05244.3704

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 119.075 C1 C3 H9 120.471
C1 C4 C5 119.075 C1 C4 H10 120.471
C2 C5 C4 119.075 C2 C5 H11 120.471
C2 C6 C3 119.075 C2 C6 H12 120.471
C3 C1 C4 121.850 C3 C1 Cl7 119.075
C3 C6 H12 120.454 C4 C1 Cl7 119.075
C4 C5 H11 120.454 C5 C2 C6 121.850
C5 C2 Cl8 119.075 C5 C4 H10 120.454
C6 C2 Cl8 119.075 C6 C3 H9 120.454
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability