Question

What is sigma bond connectivity?

Answer 1

This merely specifies the `C-C` framework of the molecule.

Explanation:

Of course, I limit the term to organic species. Isomeric pentane, for instance, has a specific connectivity with respect to the `C-C` framework: `"n-pentane; methylbutane; neopentane"`. These are all isomeric, but have demonstrably different connectivity.