In the xenon fluorides, all bonds are described with the 3-center 4-electron model and in PF 5 and SF 6, all bonds are described by an extended version of the 3-center 4-electron model (see below).
All bonds are described with the 3-center 4-electron model. This was in the xenon fluorides. All bonds are described by an extended version of the 3-center 4-electron model (see below). This was in the xenon fluorides. This was in PF 5. This was in SF 6.