Recent developments in the ligand chemistry of tellurium

Chemistry of selenium/tellurium-containing Schiff base macrocycles

“…Relevant works of others in the same field are also included. The reader is referred to the earlier reviews on selenoether and telluroether ligands for excellent introduction to the selenoether/telluroether chemistry [7][8][9][13][14][15]. It is envisaged that the progress and perspectives described in this microreview will stimulate further efforts from the scientific community of the relevant areas.…”

“…(iii) These macrocycles have the advantages of 77 Se/ 125 Te NMR spectroscopy to monitor their structures in solution as well. Also the better r-donor capacity of Se/Te ligands [7][8][9][10] compared to the lighter group 16 congeners suggests that incorporation of these donor atoms in a macrocyclic arrangement should yield ligands with rich coordination chemistry. (iv) Metal ion selectivity can be enhanced by combining different donor atoms in one ring system.…”

Supramolecular Arrangements in Organotellurium Compounds via Te···Halogen Contacts

“…Tellurium is a chemical element showing this kind of soft interactions, also known as secondary bonding (Alcock, 1972). Organotellurium compounds have been investigated mainly in organic synthesis (Singh & Sharma, 2000;Petragnani & Stefani, 2005), but also in medicine (Ba et al, 2010), in materials science (Steigerwald & Sprinkle, 1987;Hails et al, 2001) and recently in polymerization processes (organotellurium-mediated living radical polymerization (TERP)) (Kitayama et al, 2010) and to protect materials (lubricants, polymers) from oxidation (Shanks et al, 2006). The type of the Te···X interaction (and the secondary bonding interaction) and its relevance in the tellurium coordination polyhedra have been discussed (Alcock, 1972;ZukermanSchpector & Haiduc, 2001).…”

Synthesis and Crystal Structure of cis-Dichloro{bis-(N,N-dimethylaminoethyl)tellurium-.KAPPA.2N,Te}palladium(II)

“…: (a) nitrogen is a part of a heterocyclic ring and (b) a NR2 functionality is linked to an alkyl/aryl group-based skeleton. 1 Although the ligand system Te(CH2CH2NR2)2 has been reported by Srivastava et al, 3 its coordination chemistry is yet to be investigated. Herein we report on the synthesis and structure of a palladium complex cis-[PdCl2{Te(CH2CH2NMe2)2}] (Fig.…”

“…Found C, 21.4; H, 4.5; N, 6.1%. 1 The unit-cell parameters (Table 1) were determined from 25 reflections measured by a random search routine. The intensity data were measured for Lorentz polarization and absorption effects (ψ scans).…”