A radical comparison: The neutral (1) and radical cation (1.+) forms of tris(N‐phenothiazinyl)borane were prepared and their molecularstructures and spectral properties investigated. The results established that 1.+ possessed a localized radical cation on one of the phenothiazine (PTZ) rings. The crystalstructure of 1.+ showed elongation of the BN bond bound to the PTZ.+ ring (BN1: 1.53 Å).