Coupled substitution

Coupled substitution generally refers to a concept in various fields, including chemistry, materials science, and sometimes in economics or other disciplines. Here's a brief overview of its meaning in a couple of contexts: 1. **Chemistry**: In the context of chemistry, coupled substitution often refers to reactions where two or more substituents are replaced simultaneously or in a coordinated manner. For instance, in organic synthesis, certain reactions can facilitate the replacement of multiple functional groups in a single reaction step.