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Synthesis and structural characterization of [Te{(SePPh2)2N}2] and [4-MeOPhTe{(SPPh2)2N}]2

โœ Scribed by Josef Novosad; Sergey V. Lindeman; Jaromir Marek; J. Derek Woollins; Steinar Husebye

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
203 KB
Volume
9
Category
Article
ISSN
1042-7163

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โœฆ Synopsis

Reaction of K[(SePPh 2 ) 2 N] with [Te(tu) 4 ]Cl 2 (tu โ€ซืกโ€ฌ thiourea) in methanol gave [Te{(SePPh 2 ) 2 N} 2 ], (1), while reaction of K[(SPPh 2 ) 2 N] with 4-MeOPhTeCl 3 in methanol gave [4-MeOPhTe-{(SPPh 2 ) 2 N}] 2 , ( 2). The crystals of 1 are triclinic and contain centrosymmetric molecules. The ligands are bidentate and form a true square planar Te(II) complex with TeSe 4 coordination. For 2, the crystals are also triclinic, and the dimeric molecules are centrosymmetric. Each dithiolate ligand bridges the two Te(II) atoms; the result is a T-shaped coordination around each tellurium atom. A tendency to weak Te-Te bonding across the ring-formed dimer roughly in the direction of the missing fourth ligand in a potential square planar tellurium coordination sphere is also found [

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