Why there is no change in energy of Hydrogen(atom) when field is applied using gaussian software compared to when no field is applied?

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Sivasanker K Ajith Kumar

I think for hydrogen principal quantum number n is 1.

So l=0(S orbital)

So ml=0.It does not have any subshell.So in the presence of magnetic field it will not splits.

Just cross ref.

Ajit J. Thakkar

Did you include polarization functions in your basis set? They are required to obtain an energy shift.