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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2465

Title: Crystal structures of triphenyltellurium(IV) methylxanthate and isobutylxanthate — dependence on the steric influence of the alkyl group of the xanthate system
Authors: Singh, A K
Basumatary, J K
Singh, T P
Padmanabhan, B
Keywords: Xanthate ligands
Tellurium atoms
Triphenyltellurium
Methylxanthate
Chelation
Issue Date: 1992
Citation: Journal of Organometallic Chemistry,424 (1,4), 33-39p.
Abstract: The crystal structures of Ph3Te(μ-S2COMe)2TePh3 (1) and Ph3Te(S2CO(iBu)) (2) have been determined by X-ray diffraction. The two xanthate ligands bridge the two tellurium atoms in triphenyltellurium(IV) methylxanthate. The coordination environment around each Te atom of 1 is a distorted octahedron. The three Te---C (phenyl) carbon atoms form one fac set and the two Te---S bonds along with the lone pair form the other. The Te---S bonds are long, suggesting that they are weak. The xanthate ligand in 2 is chelated with tellurium. The chelation of the iBUOCS−2 skeleton is asymmetric and weak, the Te---S bond lengths being 3.535(4) and 3.123(4) Å. The change in the mode of coordination of the xanthate ligand arises from the greater steric influence of the iBu group.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/2465
Appears in Collections:Chemistry

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