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 Cl2 (Chlorine diatomic)

using model chemistry: B3LYP/aug-cc-pCVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at B3LYP/aug-cc-pCVTZ
 hartrees
Energy at 0K-920.445474
Energy at 298.15K 
HF Energy-920.445474
Nuclear repulsion energy75.955320
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 B3LYP/aug-cc-pCVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 541 541 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 270.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 270.2 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 B3LYP/aug-cc-pCVTZ
B
0.23783

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pCVTZ

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Cl1 0.000 0.000 1.007
Cl2 0.000 0.000 -1.007

Atom - Atom Distances (Å)
  Cl1 Cl2
Cl12.0135
Cl22.0135

picture of Chlorine diatomic state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pCVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Cl 0.000      
2 Cl 0.000      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.494 0.000 0.000
y 0.000 -25.494 0.000
z 0.000 0.000 -22.354
Traceless
 xyz
x -1.570 0.000 0.000
y 0.000 -1.570 0.000
z 0.000 0.000 3.140
Polar
3z2-r26.279
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.742 0.000 0.000
y 0.000 3.742 0.000
z 0.000 0.000 6.334


<r2> (average value of r2) Å2
<r2> 49.728
(<r2>)1/2 7.052