return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCD/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 CCD/3-21G
 hartrees
Energy at 0K-1143.500862
Energy at 298.15K-1143.504997
HF Energy-1142.842355
Nuclear repulsion energy439.323297
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 CCD/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 3211 3122 0.00      
2 Ag 1604 1560 0.00      
3 Ag 1243 1209 0.00      
4 Ag 1102 1072 0.00      
5 Ag 750 730 0.00      
6 Ag 318 309 0.00      
7 Au 970 943 0.00      
8 Au 430 418 0.00      
9 B1g 852 828 0.00      
10 B1u 3194 3105 0.01      
11 B1u 1540 1497 67.83      
12 B1u 1120 1089 88.35      
13 B1u 1064 1035 50.57      
14 B1u 506 492 22.62      
15 B2g 943 916 0.00      
16 B2g 714 694 0.00      
17 B2g 300 292 0.00      
18 B2u 3208 3119 0.66      
19 B2u 1432 1392 8.08      
20 B2u 1210 1177 3.08      
21 B2u 1138 1107 1.50      
22 B2u 202 196 1.96      
23 B3g 3194 3105 0.00      
24 B3g 1607 1563 0.00      
25 B3g 1371 1333 0.00      
26 B3g 667 648 0.00      
27 B3g 334 325 0.00      
28 B3u 850 827 71.27      
29 B3u 503 489 25.76      
30 B3u 102 99 1.03      

Unscaled Zero Point Vibrational Energy (zpe) 17838.9 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 17344.7 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 CCD/3-21G
ABC
0.18697 0.02102 0.01889

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.380
C2 0.000 0.000 -1.380
C3 0.000 1.220 0.703
C4 0.000 -1.220 0.703
C5 0.000 -1.220 -0.703
C6 0.000 1.220 -0.703
Cl7 0.000 0.000 3.222
Cl8 0.000 0.000 -3.222
H9 0.000 2.155 1.257
H10 0.000 -2.155 1.257
H11 0.000 -2.155 -1.257
H12 0.000 2.155 -1.257

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.76081.39541.39542.41422.41421.84214.60292.15882.15883.40583.4058
C22.76082.41422.41421.39541.39544.60291.84213.40583.40582.15882.1588
C31.39542.41422.43992.81591.40592.79934.11061.08703.42033.90282.1714
C41.39542.41422.43991.40592.81592.79934.11063.42031.08702.17143.9028
C52.41421.39542.81591.40592.43994.11062.79933.90282.17141.08703.4203
C62.41421.39541.40592.81592.43994.11062.79932.17143.90283.42031.0870
Cl71.84214.60292.79932.79934.11064.11066.44492.91712.91714.97074.9707
Cl84.60291.84214.11064.11062.79932.79936.44494.97074.97072.91712.9171
H92.15883.40581.08703.42033.90282.17142.91714.97074.31064.98982.5134
H102.15883.40583.42031.08702.17143.90282.91714.97074.31062.51344.9898
H113.40582.15883.90282.17141.08703.42034.97072.91714.98982.51344.3106
H123.40582.15882.17143.90283.42031.08704.97072.91712.51344.98984.3106

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 119.045 C1 C3 H9 120.328
C1 C4 C5 119.045 C1 C4 H10 120.328
C2 C5 C4 119.045 C2 C5 H11 120.328
C2 C6 C3 119.045 C2 C6 H12 120.328
C3 C1 C4 121.911 C3 C1 Cl7 119.045
C3 C6 H12 120.627 C4 C1 Cl7 119.045
C4 C5 H11 120.627 C5 C2 C6 121.911
C5 C2 Cl8 119.045 C5 C4 H10 120.627
C6 C2 Cl8 119.045 C6 C3 H9 120.627
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability