Question

Alternate conformations of an atom are choosen on what basis

Answer 1

If a single atom is selected, clicking Swap exchanges the positions of its two smallest substituents based on number of atoms, or if those are the same, atomic weights of the atoms directly bonded to the selected atom. Implicit hydrogens on the selected atom are considered, but not those on its substituents

Answer 2

If a single atom is selected, clicking Swap exchanges the positions of its two smallest substituents based on number of atoms, or if those are the same, atomic weights of the atoms directly bonded to the selected atom. Implicit hydrogens on the selected atom are considered, but not those on its substituents

I