geometry
 O,,             0.000000000,     0.000000000,    0.0196594609
 C,,             0.000000000,     0.000000000,    2.3248507925
 H1,,            0.000000000,     1.7597110083,   3.3972521023
 H2,,            0.000000000,    -1.7597110083,   3.3972521023
end

basis=6-31G*

{df-multi
occ,6,2,4,0
closed,4,0,1,0}

df-nevpt2

{df-multi
occ,6,2,4,0
closed,4,0,1,0
wf,sym=4}

df-nevpt2