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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-1143.509490
Energy at 298.15K-1143.513595
HF Energy-1142.841733
Nuclear repulsion energy438.738196
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 QCISD/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 3104 0.00      
2 Ag 1592 1543 0.00      
3 Ag 1237 1199 0.00      
4 Ag 1092 1059 0.00      
5 Ag 743 720 0.00      
6 Ag 316 306 0.00      
7 Au 971 941 0.00      
8 Au 429 416 0.00      
9 B1g 851 825 0.00      
10 B1u 3185 3087 0.01      
11 B1u 1532 1485 69.52      
12 B1u 1109 1075 91.43      
13 B1u 1057 1024 57.91      
14 B1u 499 484 26.13      
15 B2g 944 915 0.00      
16 B2g 713 691 0.00      
17 B2g 299 289 0.00      
18 B2u 3199 3101 0.55      
19 B2u 1424 1380 8.63      
20 B2u 1204 1167 3.80      
21 B2u 1132 1097 1.17      
22 B2u 200 194 2.01      
23 B3g 3185 3087 0.00      
24 B3g 1597 1548 0.00      
25 B3g 1365 1323 0.00      
26 B3g 664 643 0.00      
27 B3g 332 321 0.00      
28 B3u 850 824 70.97      
29 B3u 502 486 25.77      
30 B3u 101 98 1.05      

Unscaled Zero Point Vibrational Energy (zpe) 17762.3 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 17215.2 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 QCISD/3-21G
ABC
0.18644 0.02096 0.01884

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/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 1.222 0.704
C4 0.000 -1.222 0.704
C5 0.000 -1.222 -0.704
C6 0.000 1.222 -0.704
Cl7 0.000 0.000 3.227
Cl8 0.000 0.000 -3.227
H9 0.000 2.157 1.258
H10 0.000 -2.157 1.258
H11 0.000 -2.157 -1.258
H12 0.000 2.157 -1.258

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.76101.39671.39672.41602.41601.84654.60752.16052.16053.40843.4084
C22.76102.41602.41601.39671.39674.60751.84653.40843.40842.16052.1605
C31.39672.41602.44372.82011.40762.80354.11631.08733.42413.90742.1737
C41.39672.41602.44371.40762.82012.80354.11633.42411.08732.17373.9074
C52.41601.39672.82011.40762.44374.11632.80353.90742.17371.08733.4241
C62.41601.39671.40762.82012.44374.11632.80352.17373.90743.42411.0873
Cl71.84654.60752.80352.80354.11634.11636.45392.92022.92024.97724.9772
Cl84.60751.84654.11634.11632.80352.80356.45394.97724.97722.92022.9202
H92.16053.40841.08733.42413.90742.17372.92024.97724.31414.99472.5170
H102.16053.40843.42411.08732.17373.90742.92024.97724.31412.51704.9947
H113.40842.16053.90742.17371.08733.42414.97722.92024.99472.51704.3141
H123.40842.16052.17373.90743.42411.08734.97722.92022.51704.99474.3141

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 118.979 C1 C3 H9 120.348
C1 C4 C5 118.979 C1 C4 H10 120.348
C2 C5 C4 118.979 C2 C5 H11 120.348
C2 C6 C3 118.979 C2 C6 H12 120.348
C3 C1 C4 122.043 C3 C1 Cl7 118.979
C3 C6 H12 120.673 C4 C1 Cl7 118.979
C4 C5 H11 120.673 C5 C2 C6 122.043
C5 C2 Cl8 118.979 C5 C4 H10 120.673
C6 C2 Cl8 118.979 C6 C3 H9 120.673
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability