Nitrogen tellurium—oxygen bonds

The SRN1 process has proven to be a versatile mechanism for replacing a suitable leaving group by a nucleophile at the ipso position. This reaction affords substitution in nonactivated aromatic (ArX) compounds, with an extensive variety of nucleophiles ( u ) derived from carbon, nitrogen, and oxygen to form new C—C bonds, and from tin, phosphorus, arsenic, antimony, sulfur, selenium, and tellurium to afford new C-heteroatom bonds. 

The tellurium atom is in a pentagonal bipyramidal environment with three nitrogen atoms and two oxygen atoms in the equatorial plane. The nitrogen atom covalently bonded to the tellurium atom is in the apical position1. 

The single crystal X-ray structural analysis of bis[diphenyl thiocyanato] tellurium oxide showed that the two tellurium atoms in the molecule are linked by an oxygen atom. The thiocyanate groups are bonded to tellurium via the nitrogen atoms1. 

In the first section of this chapter some of the properties of the elements hydrogen, carbon, nitrogen, phosphorus, arsenic, antimony, bismuth, oxygen, sulfur, selenium, tellurium, fluorine, chlorine, bromine, and iodine are described. The following sections are devoted to some of their compounds with one another, especially the single-bonded normal-valence compounds. Compounds of nonmetals with oxygen are discussed in the following chapter. 

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