Final answer:
CIF is a similar ASCII line entry notation for metallic compounds, including repeating structure in space.
Step-by-step explanation:
SMILES (Simplified Molecular Input Line Entry System) is a standardized notation used to represent the chemical structures of organic molecules. It is not designed for metallic compounds. However, there is a similar ASCII line entry notation for metallic compounds called Crystallographic Information File (CIF). CIF is a widely used format for describing crystal structures, which often contain metal atoms.
CIF can represent the repeating structure in space for metallic compounds and includes information about the arrangement of atoms, bond distances, and angles. It is used by crystallographers to store and exchange crystallographic data for metals and other materials.
So, for metallic compounds, including repeating structures in space, CIF is the appropriate notation to use.