Tellurium nitride describes chemical compounds of Te containing N<sup>3âÂÂ</sup>. Efforts have been made toward the binary nitrides but the results are inconclusive and it appears that such materials are unstable. Still unconfirmed is Te<sub>4</sub>N<sub>4</sub>, which would be an analogue of tetraselenium tetranitride (Se<sub>4</sub>N<sub>4</sub>) and tetrasulfur tetranitride (S<sub>4</sub>N<sub>4</sub>). It has long been known that ammonia reacts with tellurium tetrachloride, which is similar to the method of synthesis of S<sub>4</sub>N<sub>4</sub>. The reaction of TeCl<sub>4</sub> with a tetrahydrofuran solution of N(SiMe<sub>3</sub>)<sub>3</sub> gives a well-defined tellurium nitride [Te<sub>6</sub>N<sub>8</sub>(TeCl<sub>4</sub>)<sub>4</sub>(THF)<sub>4</sub>] (THF = tetrahydrofuran).