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All results from a given calculation for H2 (Hydrogen diatomic)

using model chemistry: MP2/3-21G*

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 MP2/3-21G*
 hartrees
Energy at 0K-1.140255
Energy at 298.15K-1.140175
HF Energy-1.122929
Nuclear repulsion energy0.713838
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 MP2/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 4553 4331 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 2276.2 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 2165.4 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 MP2/3-21G*
B
60.87495

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.000 0.371
H2 0.000 0.000 -0.371

Atom - Atom Distances (Å)
  H1 H2
H10.7413
H20.7413

picture of Hydrogen diatomic state 1 conformation 1
More geometry information
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability