Premium
125 Te, 13 C and 1 H NMR characterization of a series of diorganotellurium(II) and tetraorganotellurium(IV) compounds
Author(s) -
Gedridge Robert W.,
Higa Kelvin T.,
Nissan Robin A.
Publication year - 1995
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260330606
Subject(s) - chemistry , characterization (materials science) , physics , optics
125 Te, 13 C and 1 H NMR studies on a series of symmetric diorganotellurium(II) [R 2 Te, where R = Me, Et, n ‐Bu, CH 2 SiMe 3 , allyl, vinyl, CCMe, CCEt, CC( n ‐Pr), CC( t ‐Bu), CC(SiMe 3 ) and CCPh], unsymmetric diorganotellurium(II) (RTeR′) (where R = allyl, R′ = Me, Et, i ‐Pr, t ‐Bu; R = Me and R′ = benzyl), symmetric bis(alkyltelluro)ethyne (RTeC=CTeR, where R = Me and Et) and symmetric tetraorganotellurium(IV) (R 4 Te, where R = Me, n ‐Bu, CH 2 SiMe 3 and vinyl) compounds are presented. 125 Te was acquired under 1 H‐decoupled and 1 H‐coupled conditions. Whereas the 1 H‐decoupled 125 Te NMR spectra are extremely useful in identifying low levels of tellurium containing impurities, the 1 H‐coupled 125 Te experiments allow for structure determination and identification of long‐ and short‐range coupling pathways. 1 H and 13 C NMR were used to assess purity in terms of organic materials which can include solvents, decomposition byproducts and unwanted organometallic compounds from side reactions occurring during synthesis. 125 Te satellites are observed in the 1 H and 13 C NMR spectra and are useful in resonance assignments and in identification of long‐ and short‐range coupling pathways. The effects of substituents on chemical shifts and coupling constants are discussed.