Premium
Versatility of Bis(2‐pyridyl)ditellane
Author(s) -
da Silva Felipe D.,
Simões Claudia A. D. P.,
S. dos Santos Sailer,
Lang Ernesto S.
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700093
Subject(s) - hypervalent molecule , chemistry , chalcogen , halogen , crystallography , ligand (biochemistry) , protonation , adduct , metal , stereochemistry , monomer , ion , alkyl , organic chemistry , polymer , biochemistry , receptor , reagent
The different nature of the Te and N binding sites of bis(2‐pyridyl)ditellane ‐ o Py 2 Te 2 ‐ ( 1 ) in reactions with halogen, hydrohalic acids and a metal salt were explored in this work in order to obtain seven compounds: H o PyTeCl 2 ( 2 ), H o PyTeBr 2 ( 3 ), o PyTeI ( 4 ), H o PyTeI 2 ( 5 ), H o PyTeI 4 ( 6 ), Me o PyTeI 2 ( 7 ), and [ o PyTeCuCl] 2 ( 8 ). The compounds were structurally characterized by X‐ray diffraction, which revealed, in almost all of the compounds, the presence of hypervalent chalcogen adducts containing a formal negative charge located on the Te II or Te IV atom stabilized by the protonated ( 2 , 3 , and 5 ) and methylated ( 7 ) pyridyl group. Compound 4 has a dimeric structure built up by association of highly unstable monomeric ArTeX units (X=Cl, Br, I) through Te‐N interactions while compound 8 is a binuclear coordination complex, in which 1 behaves as a tridentate ligand, with κ 2 N 2 , Te 8 coordination for one Cu I ion and κ N 10 coordination for the other Cu I ion.