# peroxide, freezing the h-o-o bond angles
zmatrix angstroms
  o
  o     1 1.400
  h     1 1.000    2 109.5
  h     2 1.000    1 109.5    3 120.0
end
runtype optimize
afreeze 3 1 2
afreeze 4 2 1
end
aux1a
tzp/dzp
