Search results for "imidotelluroxanes"

Experimental and Theoretical Investigations of Tellurium(IV) Diimides and Imidotelluroxanes: X-ray Structures of B(C6F5)3 Adducts of OTe(μ-NtBu)2TeNt…

2005

The hydrolysis of tBuNTe(μ-NtBu)2TeNtBu (1) with 1 or 2 equiv of (C6F5)3B·H2O results in the successive replacement of terminal imido groups by oxo ligands to give the telluroxane-Lewis acid adducts (C6F5)3B·OTe(μ-NtBu)2TeNtBu (2) and [(C6F5)3B·OTe(μ-NtBu)2Te(μ-O)]2 (3), which were characterized by multinuclear NMR spectroscopy and X-ray crystallography. The TeO distance in 2 is 1.870(2) Å. The di-adduct 3 involves the association of four tBuNTeO monomers to give a tetramer in which both terminal TeO groups [d(TeO) = 1.866(3) Å] are coordinated to B(C6F5)3. The central Te2O2 ring in 3 is distinctly unsymmetrical [d(TeO) = 1.912(3) and 2.088(2) Å]. The X-ray structure of (C6F5)3B·NH2tBu (4),…