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

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-1143.462938
Energy at 298.15K-1143.467053
HF Energy-1142.842292
Nuclear repulsion energy439.165801
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 MP2/3-21G
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 3242 3094 0.00      
2 Ag 1579 1507 0.00      
3 Ag 1247 1191 0.00      
4 Ag 1095 1045 0.00      
5 Ag 748 714 0.00      
6 Ag 317 303 0.00      
7 Au 953 910 0.00      
8 Au 433 414 0.00      
9 B1g 843 805 0.00      
10 B1u 3225 3078 0.23      
11 B1u 1530 1460 72.92      
12 B1u 1113 1063 101.58      
13 B1u 1060 1011 54.74      
14 B1u 504 481 27.01      
15 B2g 925 883 0.00      
16 B2g 704 671 0.00      
17 B2g 298 285 0.00      
18 B2u 3239 3092 0.03      
19 B2u 1422 1357 8.80      
20 B2u 1320 1260 0.64      
21 B2u 1142 1090 2.95      
22 B2u 202 193 1.75      
23 B3g 3225 3079 0.00      
24 B3g 1588 1516 0.00      
25 B3g 1372 1310 0.00      
26 B3g 665 635 0.00      
27 B3g 334 318 0.00      
28 B3u 839 801 76.16      
29 B3u 500 477 26.01      
30 B3u 101 97 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 17882.4 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 17068.7 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 MP2/3-21G
ABC
0.18674 0.02100 0.01888

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.381
C2 0.000 0.000 -1.381
C3 0.000 1.221 0.703
C4 0.000 -1.221 0.703
C5 0.000 -1.221 -0.703
C6 0.000 1.221 -0.703
Cl7 0.000 0.000 3.224
Cl8 0.000 0.000 -3.224
H9 0.000 2.155 1.255
H10 0.000 -2.155 1.255
H11 0.000 -2.155 -1.255
H12 0.000 2.155 -1.255

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.76231.39661.39662.41572.41571.84244.60472.15852.15853.40503.4050
C22.76232.41572.41571.39661.39664.60471.84243.40503.40502.15852.1585
C31.39662.41572.44192.81801.40642.80054.11221.08483.42063.90282.1697
C41.39662.41572.44191.40642.81802.80054.11223.42061.08482.16973.9028
C52.41571.39662.81801.40642.44194.11222.80053.90282.16971.08483.4206
C62.41571.39661.40642.81802.44194.11222.80052.16973.90283.42061.0848
Cl71.84244.60472.80052.80054.11224.11226.44712.91852.91854.97024.9702
Cl84.60471.84244.11224.11222.80052.80056.44714.97024.97022.91852.9185
H92.15853.40501.08483.42063.90282.16972.91854.97024.30964.98752.5105
H102.15853.40503.42061.08482.16973.90282.91854.97024.30962.51054.9875
H113.40502.15853.90282.16971.08483.42064.97022.91854.98752.51054.3096
H123.40502.15852.16973.90283.42061.08484.97022.91852.51054.98754.3096

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 119.041 C1 C3 H9 120.369
C1 C4 C5 119.041 C1 C4 H10 120.369
C2 C5 C4 119.041 C2 C5 H11 120.369
C2 C6 C3 119.041 C2 C6 H12 120.369
C3 C1 C4 121.917 C3 C1 Cl7 119.041
C3 C6 H12 120.589 C4 C1 Cl7 119.041
C4 C5 H11 120.589 C5 C2 C6 121.917
C5 C2 Cl8 119.041 C5 C4 H10 120.589
C6 C2 Cl8 119.041 C6 C3 H9 120.589
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability