Symmetry
  SymmetrizeTolerance 0.001
End

System
  Atoms
Hg     14.517993    2.551168   11.962722
Cl     14.036020    1.118465   13.901434
Cl     12.001762    2.262754   10.906282
Cl     14.574965    4.777084   12.988375
Cl     15.538473    2.027670    9.835622
Cl     18.028359    2.937941   12.365594
  End
  Charge -3 
End

task SinglePoint

Engine adf
  Relativity
    Formalism ZORA
    Level Spin-Orbit 
  End
  SpinPolarization 0 
  adddiffusefit True
  basis
     Type TZ2P
     Core none
  End
  dependency
    bas 4e-3
  End
  integration
     accint 7
  End
  save TAPE10 TAPE21
  scf
    converge 1e-7 1e-7
    iterations 1000
  End
  symmetry Nosym
  xc
    hybrid PBE0
  End
EndEngine