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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/750

Title: Ditelluroether ligand bis(4-methoxyphenyltelluro)methane — synthesis, reaction with iodine and its ruthenium(II) complexes. Crystal structures of (4-MeOC6H4Te)2CH2, {4-MeO-C6H4Te(I2)}2CH2 cis-[Ru(DMSO)2Cl2(4-MeOC6H4Te)2CH2] and [(p-cymene)Cl2Ru(m-{(4-MeOC6H4Te)2CH2})RuCl2(p-cymene)]
Authors: Singh, Ajai K
Kadarkaraisamy, M
Drake, J E
Butcher, R J
Keywords: Ditelluroether complexes
Crystal structures
Ruthenium complexes
Issue Date: 2000
Citation: Inorganica Chimica Acta, 304(1), 45–51
Abstract: The reaction of chloroform with ArTe- Na+ (Ar=4-MeOC6H4), generated in situ by borohydride reduction of Ar2Te2, results in a high purity sample of bis(4- ethoxyphenyltelluro)methane (1) (yield -90%). Its single crystal structure has been reported.The Te-C-Te angle is found to be 117(1)°. The oxidative addition of I2 to 1 results in {4-MeO-C6H4Te(I2)}2CH2 (1a), which is also characterized structurally. The iodine atoms at each Te atom occupy axial positions. The two TeI bonds are longer than the other two. The and I(4) with the neighbouring Te atoms lead to polymeric links of essentially Te-I-Te%-I% rectangular bridges (angles 89.07(3)–94.68(3)°. The complexes of 1 with Ru(II) viz. cis-[Ru(DMSO)2Cl2(4-MeOC6H4Te)2CH2] (2) and [(p-cymene)Cl2Ru(m-1)RuCl2(p-cymene)] (2a) are synthesized and characterized structurally. The geometry of Ru(II) in the complex 2 is distorted octahedral. (Ru-Te 2.5988(5)–2.6727(5) A, ; Te(1)-Ru(1)-Te(2)-78.2(2)°;Te(1)-Ru(1)-Cl(2)-76.6(2)°. The distortions are not shared equally by the two tellurium atoms. The Te(1) displays much larger distortions of cis angles than those involving Te(2). The Te-C(aromatic) distances are shorter than Te-C(alkyl) bond lengths. The 2a is the first example in which the ligand 1 is shown to coordinate in a bridging mode, i.e. with two Ru atoms (Ru-Te 2.6381(16)–2.6411(2) A, ). The Te(1)-C-Te(2) angle is 119.3(9)°. Similarly 2 is also the first example that has four membered chelate ring containing Ru and two Te atoms.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/750
Appears in Collections:Chemistry

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