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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1256

Title: Asymmetric diorganotellurides containing substituted pyridyl groups—synthesis and ligation with palladium(II) and platinum(II). Crystal structure of [Pd{4-MeC6H4Te CH2CH2-2-(C5H4N)} Cl2] · 2CHCl3
Authors: Khalid, Abu
Singh, Ajai K
Keywords: diorganotelluride
palladium
platinum
synthesis
complexation
structure
Issue Date: 1997
Citation: Polyhedron, 16(1), 33-37
Abstract: A (N,Te,N) ligand 2-(2-pyridoethyletelluro)ethylpyridine (1) has been synthesized by reacting in situ generated Na2Te with 2-(2-chloroethyl)pyridine. The PdII and PtII complexes of stoichiometry [MCl·1]Cl have been studied. The deshielding of ortho protons of pyridine and CH2Te signal (up to 0.5 ppm) indicate that 1 ligates in a tridentate mode. The red shift (20–25 cm−1) in ν(Te---C(alkyl)) supports the involvement of Te in coordination. Molecular weights and ΛM values of these complexes support their ionic nature (1 : 1 electrolyte). The reactions of 2-(chloromethyl)pyridine and 2,6-bis(chloromethyl)pyridine with ArTeNa (Ar = 4-MeOC6H4) could not produce (N,Te) and Te,N,Te) ligands comprising pyridyl groups. The CHCl3 present as a solvent in these reactions reacted with ArTeNa resulting in (ArTe)2CH2. To understand the behaviour of Te donor site vis-à-vis pyridyl group the single crystal structure of Pd{4-MeC6H4TeCH2CH2-2-(C5H4N)}Cl2 · 2CHCl3 was solved. An endo, puckered chelate ring is formed by (N,Te) ligand. The trans influence of the pyridyl group appears to be lower or comparable to that of tellurium.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1256
Appears in Collections:Chemistry

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