connectivity {<connectivity-statement>} end
Determines the covalent connectivity of a specified set of atoms.
<connectivity-statement> :==
setidto=<atom-object>
Each set is assigned a unique id (1,...,mset). The individual
set ids are optionally stored in the specified atom-object.
The total number of sets is stored in symbol $mset.
All atomic properties are allowed except scatter_fp and scatter_fdp.