ammonia
zmatrix angstroms
  n
  xx      1 1.000
  h       1 1.000      2 109.5
  h       1 1.000      2 109.5      3 +120.0
  h       1 1.000      2 109.5      3 -120.0
end
runtype start optimize
potential becke
grid fine random
maxiterations 40
maxgeometries 10
econvergence 0.0000001
gconvergence 0.0001
mixing  0.350
maxstep 0.100
diis on
hessian 3
end
a-nitrogen (4,4;4,4)
a-hydrogen (3,1;3,1)
a-hydrogen (3,1;3,1)
a-hydrogen (3,1;3,1)
o-nitrogen (7111/411/1*)
o-hydrogen (41/1*)
o-hydrogen (41/1*)
o-hydrogen (41/1*)
