End-to-end vector

In the physical chemistry study of polymers, the end-to-end vector is the vector that points from one end of a polymer to the other end.

If each monomer unit in a polymer is represented by a point in space, the translation vectors

is the sum of these translation vectors: The norm of the end-to-end vector is called the end-to-end distance.

The quadratic mean of the end-to-end distance

can be related to the quadratic mean of the radius of gyration