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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-1143.896380
Energy at 298.15K-1143.900551
HF Energy-1143.057190
Nuclear repulsion energy445.176903
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 3202 3063 0.00      
2 Ag 1609 1539 0.00      
3 Ag 1243 1189 0.00      
4 Ag 1106 1057 0.00      
5 Ag 767 734 0.00      
6 Ag 332 318 0.00      
7 Au 945 904 0.00      
8 Au 422 404 0.00      
9 B1g 835 799 0.00      
10 B1u 3184 3046 0.63      
11 B1u 1536 1469 71.98      
12 B1u 1131 1082 104.57      
13 B1u 1063 1016 17.80      
14 B1u 541 517 24.68      
15 B2g 913 874 0.00      
16 B2g 680 651 0.00      
17 B2g 301 288 0.00      
18 B2u 3199 3060 1.58      
19 B2u 1435 1372 8.69      
20 B2u 1189 1137 1.20      
21 B2u 1144 1094 1.99      
22 B2u 222 212 1.30      
23 B3g 3184 3046 0.00      
24 B3g 1589 1520 0.00      
25 B3g 1367 1308 0.00      
26 B3g 668 639 0.00      
27 B3g 361 346 0.00      
28 B3u 826 790 71.71      
29 B3u 492 471 21.00      
30 B3u 104 99 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 17793.9 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 17019.8 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
0.18707 0.02181 0.01954

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 1.393
C2 0.000 0.000 -1.393
C3 0.000 1.219 0.702
C4 0.000 -1.219 0.702
C5 0.000 -1.219 -0.702
C6 0.000 1.219 -0.702
Cl7 0.000 0.000 3.155
Cl8 0.000 0.000 -3.155
H9 0.000 2.157 1.253
H10 0.000 -2.157 1.253
H11 0.000 -2.157 -1.253
H12 0.000 2.157 -1.253

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.78511.40111.40112.42372.42371.76274.54782.16192.16193.41353.4135
C22.78512.42372.42371.40111.40114.54781.76273.41353.41352.16192.1619
C31.40112.42372.43842.81391.40442.73944.04561.08783.42113.90172.1684
C41.40112.42372.43841.40442.81392.73944.04563.42111.08782.16843.9017
C52.42371.40112.81391.40442.43844.04562.73943.90172.16841.08783.4211
C62.42371.40111.40442.81392.43844.04562.73942.16843.90173.42111.0878
Cl71.76274.54782.73942.73944.04564.04566.31062.87642.87644.90764.9076
Cl84.54781.76274.04564.04562.73942.73946.31064.90764.90762.87642.8764
H92.16193.41351.08783.42113.90172.16842.87644.90764.31474.98942.5055
H102.16193.41353.42111.08782.16843.90172.87644.90764.31472.50554.9894
H113.41352.16193.90172.16841.08783.42114.90762.87644.98942.50554.3147
H123.41352.16192.16843.90173.42111.08784.90762.87642.50554.98944.3147

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 119.520 C1 C3 H9 120.071
C1 C4 C5 119.520 C1 C4 H10 120.071
C2 C5 C4 119.520 C2 C5 H11 120.071
C2 C6 C3 119.520 C2 C6 H12 120.071
C3 C1 C4 120.960 C3 C1 Cl7 119.520
C3 C6 H12 120.408 C4 C1 Cl7 119.520
C4 C5 H11 120.408 C5 C2 C6 120.960
C5 C2 Cl8 119.520 C5 C4 H10 120.408
C6 C2 Cl8 119.520 C6 C3 H9 120.408
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability