#ZMATRIX GAUSSIAN Cartesian + internal coordinates O 0 xo 0. zo C 0 0. yc 0. C 0 0. -yc 0. N 0 xn 0. 0. H 2 r1 3 a1 1 b1 H 2 r2 3 a2 1 b2 H 3 r1 2 a1 1 -b1 H 3 r2 2 a2 1 -b2 H 4 r3 2 a3 3 d3 Variables: xo -1. zo 0. yc 1. xn 1. r1 1.08 r2 1.08 r3 1.02 a1 125. a2 125. a3 135. # note -- this line is missing at http://openmopac.net/manual/gaussian_z.html d3 160. b1 90. b2 -90.