Is it possible to just load the atoms without bonds? I’m trying to load a couple hundred carbon atoms for graphene and with auto bonds trying to figure out single/double bonds, opening the file either takes a few minutes or crashes the software.
Yes, you can go to:
File→Import→Molecular File…
Manual: https://avogadro.cc/docs/menus/file-menu/
You can then set whether you want bond order perception:
