What is a bis molecule?

Answer 1

"bis" means bi-substituted in the way that there are two identical groups attached to a molecule. For example, if you have a bis-amide, you have a molecule that has 2 identical amides attached to it.

Answer 2

A bis molecule is a compound or molecule that contains two identical functional groups or ligands attached to a central atom. The term "bis" is often used as a prefix to indicate the presence of two of the same groups in a chemical compound.