Synthesis and structural characterization of two interesting sandwich and double sandwich type mixed-valent tellurium-dithiocarbamate complexes.

R. Krishna Kumar, G. Aravamudan, M. Seshasayee, Kandasamy Sivakumar, Hoong Kun Fun, Israel Goldberg

Research output: Contribution to journalArticlepeer-review

Abstract

Two novel mixed-valent tellurium(II and IV) dithiocarbamate complexes have been prepared and their structures determined by X-ray diffraction studies. Complex 1, [TeIV(S2CNEt2)3]2[Te II(S2CNEt2)2](PF6) 2, was obtained from the metathesis reaction of [TeIV(S2CNEt2)3ClO4] with KPF6 due to the partial reduction of the primary product [TeIV(S2CNEt2)3]PF6, which is thermodynamically unstable. The preparation of tellurium(IV) dithiocarbamate in dilute perchloric acid medium results in complex 2, which has a composition [TeIV(S2CNEt2)3][Te II(S2CNEt2)2](ClO4). These two complexes represent the first examples of mixed valent complexes of tellurium consisting only the sulphur ligands. Their structural investigation shows that these complexes are stabilized primarily due to the supramolecular Te⋯Te interaction, the distance of which is shorter than the earlier known complex. While TeII(S2CNEt2)2 is sandwiched between two TeIV(S2CNEt2)3 molecules in 1, two such Te(II) molecules are sandwiched in complex 2.

Original languageEnglish
Pages (from-to)1659-1675
Number of pages17
JournalPolyhedron
Volume17
Issue number10
DOIs
StatePublished - 1998

Keywords

  • Crystal structures
  • Mixed-valent
  • Supramolecular interactions
  • Tellurium-dithiocarbamate complexes

Fingerprint

Dive into the research topics of 'Synthesis and structural characterization of two interesting sandwich and double sandwich type mixed-valent tellurium-dithiocarbamate complexes.'. Together they form a unique fingerprint.

Cite this