SO4 - Ideal conformer
     RDKit          3D

  5  4  0  0  0  0  0  0  0  0999 V2000
    0.0000    0.0000    0.0000 S   0  0  0  0  0  6  0  0  0  0  0  0
    0.0000   -1.2010   -0.8500 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    1.2010   -0.8500 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2010    0.0000    0.8500 O   0  0  0  0  0  1  0  0  0  0  0  0
    1.2010    0.0000    0.8500 O   0  0  0  0  0  1  0  0  0  0  0  0
  1  2  2  0
  1  3  2  0
  1  4  1  0
  1  5  1  0
M  CHG  2   4  -1   5  -1
M  END
$$$$