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: MP2=FULL/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=FULL/3-21G*
 hartrees
Energy at 0K-1143.882754
Energy at 298.15K-1143.886912
HF Energy-1143.057322
Nuclear repulsion energy445.399583
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=FULL/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 3234 3066 0.00      
2 Ag 1584 1502 0.00      
3 Ag 1247 1182 0.00      
4 Ag 1099 1041 0.00      
5 Ag 764 725 0.00      
6 Ag 332 315 0.00      
7 Au 929 881 0.00      
8 Au 426 404 0.00      
9 B1g 827 784 0.00      
10 B1u 3216 3049 0.18      
11 B1u 1525 1446 77.91      
12 B1u 1124 1065 123.08      
13 B1u 1058 1003 18.00      
14 B1u 541 513 29.71      
15 B2g 900 853 0.00      
16 B2g 665 631 0.00      
17 B2g 300 285 0.00      
18 B2u 3231 3063 0.36      
19 B2u 1427 1353 9.42      
20 B2u 1304 1236 0.00      
21 B2u 1144 1085 2.97      
22 B2u 222 211 1.19      
23 B3g 3217 3049 0.00      
24 B3g 1570 1488 0.00      
25 B3g 1368 1297 0.00      
26 B3g 667 633 0.00      
27 B3g 361 342 0.00      
28 B3u 816 774 76.27      
29 B3u 490 464 21.30      
30 B3u 104 98 0.58      

Unscaled Zero Point Vibrational Energy (zpe) 17845.6 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 16917.6 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=FULL/3-21G*
ABC
0.18685 0.02185 0.01956

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/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 1.220 0.702
C4 0.000 -1.220 0.702
C5 0.000 -1.220 -0.702
C6 0.000 1.220 -0.702
Cl7 0.000 0.000 3.152
Cl8 0.000 0.000 -3.152
H9 0.000 2.156 1.252
H10 0.000 -2.156 1.252
H11 0.000 -2.156 -1.252
H12 0.000 2.156 -1.252

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 Cl7 Cl8 H9 H10 H11 H12
C12.78581.40221.40222.42462.42461.75934.54522.16092.16093.41243.4124
C22.78582.42462.42461.40221.40224.54521.75933.41243.41242.16092.1609
C31.40222.42462.44062.81581.40442.73724.04301.08553.42103.90122.1667
C41.40222.42462.44061.40442.81582.73724.04303.42101.08552.16673.9012
C52.42461.40222.81581.40442.44064.04302.73723.90122.16671.08553.4210
C62.42461.40221.40442.81582.44064.04302.73722.16673.90123.42101.0855
Cl71.75934.54522.73722.73724.04304.04306.30452.87422.87424.90374.9037
Cl84.54521.75934.04304.04302.73722.73726.30454.90374.90372.87422.8742
H92.16093.41241.08553.42103.90122.16672.87424.90374.31264.98672.5038
H102.16093.41243.42101.08552.16673.90122.87424.90374.31262.50384.9867
H113.41242.16093.90122.16671.08553.42104.90372.87424.98672.50384.3126
H123.41242.16092.16673.90123.42101.08554.90372.87422.50384.98674.3126

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 119.512 C1 C3 H9 120.062
C1 C4 C5 119.512 C1 C4 H10 120.062
C2 C5 C4 119.512 C2 C5 H11 120.062
C2 C6 C3 119.512 C2 C6 H12 120.062
C3 C1 C4 120.976 C3 C1 Cl7 119.512
C3 C6 H12 120.426 C4 C1 Cl7 119.512
C4 C5 H11 120.426 C5 C2 C6 120.976
C5 C2 Cl8 119.512 C5 C4 H10 120.426
C6 C2 Cl8 119.512 C6 C3 H9 120.426
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability