This keyword It specifies the molecular geometry and should be placed at the end of the input file. It is followed by the molecular geometry
Coordinates or bond distances are given in atomic units
Coordinates or bond distances are given in Angstrom. (This is the default
The molecular structure is given in Cartesian coordinates. This is the default.
The first atoms of the molecular structure are defined by Cartesian coordinates and the following ones are defined by a Z-Matrix.
The molecular structure is defined by a Z-Matrix