Tetravalent Tellurium Ligands

Abstract

Oxidative addition of TeCl to Vaska's complex gave the trichlorotelluronium complex [IrCl (TeCl )(CO)(PPh ) ] (structure depicted), which contains a rare example of a structurally characterized tetravalent tellurium ligand. The coordination at the Te center is-in full agreement with the VSEPR model-distorted trigonal bipyramidal.

Oxidation in Nonclassical Organolanthanide Chemistry: Synthesis, Characterization, and X-ray Crystal Structures of Cerium(III) and -(IV) Amides

“…It is, then, initially even more surprising to find that oxidation may take place at the metal when utilizing even weaker (in an electrochemical sense) oxidants (Scheme ). Our first resort was to use TeCl 4 , a high-valent main-group compound which one of us has applied successfully in the past to oxidation of some transition metal complexes …”

Synthesis and molecular structure of [((CO)3RuBr2)2(μ-SePh)2Ru(CO)4] cluster with a Ru3Se2 chain core

“…With a few exceptions, [(CO) 5 Mn(TeCl 4 )] À [1], [Ir(TeCl 3 )Cl 2 (CO) (PPh 3 ) 2 ] [2] and the Re 6 -octahedron clusters, [Re 6 (m 3 -Te) 6 (TeCl 2 ) 2 Cl 2 ] Cl 4 , [Re 6 (m 3 -Te) 8 (TeBr 2 ) 6 ]Br 2 [3], [Re 6 (m 3 -Te) 8 (TeI 2 ) 6 ]I 2 [4], the chalcohalide ligands have been reported to exist predominantly in the form of Q II X 2 (Q ¼ S, Se, Te, X ¼ Cl, Br, I), stabilized through secondary interaction with a neighbouring halide ligand (X/QX 2 ) as, for example, in PtCl 4 (SCl 2 ) [5], PdX 2 (QX 2 ) 2 (Q ¼ Se, X ¼ Cl [6]; Q ¼ Se, Te, X ¼ Br [6]), M 2 (m-S 2 ) 2 (SeCl 2 ) 2 Cl 6 (M ¼ W, Mo [7]), Re 2 Br 4 (m-Te 2 ) (m-TeBr) 2 (TeBr 2 ) 2 [8], [Re 4 (m 3 -Q) 4 X 8 (TeX 2 ) 4 ] (Q ¼ S, Se, Te, X ¼ Cl [9,10]), [Mo 3 Q 7 ]X 2 (TeX 2 ) 1e3 (Q ¼ Se, X ¼ Br, I [11], Q ¼ Te, X ¼ I (Scheme 1a, [12]), [(h 4 -(TeI 2 ) 2 (m-I) 2 )Nb(m-Q 2 ) 2 )Nb(h 4 -Te 2 I 6 )] (Q ¼ Se [13], Q ¼ Te [14]), [Fe 2 (CO) 6 (m-Te 4 )(m-TeCl 2 ) [15].…”