Static and dynamic disorder in organotin compounds: A bis(amido)stannylene coordinated by N,N′-diisopropyl-1,8-diamidonaphthalene

The root-mean-square amplitude of vibration of the tin atom in the bis(amido)stannylene Sn[1,8-(NiPr)2C10H6] has been determined from temperature-dependent 119Sn Mössbauer effect measurements over the range 98 < T < 225 K and compared with the Ui,j value extracted from a single crystal X-ray diffraction study. The large difference in these values (at 238 K) is associated with the flexibility in the bonding between the Sn center and chelating diamido ligand in this complex.