Binary Tellurium(IV) Azides: Te(N3)4 and [Te(N3)5]


  • Financial support from the University of Munich and the Fonds der Chemischen Industrie is gratefully acknowledged. We thank Prof. P. Klüfers for generous allocation of X-ray diffractometer time, and Prof. K. O. Christe and his colleagues for exchange of information about their independent syntheses of Te(N3)4 and [Te(N3)6]2−.


original image

Very sensitive materials: Tellurium tetraazide, Te(N3)4, was prepared directly from TeF4 and Me3SiN3 as an extremely sensitive solid; azidation of a pentafluorotellurate(IV) anion gave the pentaazidotellurate(IV) anion. The crystal structure of the pyridinium salt [pyH][Te(N3)5] consists of [Te(N3)5] units, considerably distorted from ideal square-pyramidal symmetry, that are linked through Te⋅⋅⋅N interactions (see picture).