$control
 task=optimize
 theory=riMP2
 basis=basis.in
$end
$grid acc=1e-8 $end
$scf conv=1e-6 $end
$optimize tol=1e-5 $end


$molecule
 z-matrix
 set=L2
   1
   8    1    0.95696218
   1    2    0.96668416    1    104.449903
   8    3    1.92693155    2    169.851516    1   -179.999790
   1    4    0.95919758    3    104.040228    2     54.707792
   1    4    0.95919759    3    104.040264    2    -54.708098
$end

