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Abstract
ArTe− generated in situ by borohydride reduction of Ar2Te2 (Ar = 4-CH3OC6H4) reacts readily with ClCH2CH(OH)CH2Cl resulting in the formulation of ArTeCH2CH(OH)CH2TeAr(1) which forms complexes of stoichiometry MCl2.1 (where M = Hg(II), Pd(II) and Pt(II)). The presence of the OH signal and the deshielding of aryl and CH2 protons in 1H NMR spectra of these complexes suggest that only two tellurium atoms coordinate with the metal atoms. 1 partially dissociates out from Hg(II) complex as evidenced by complicated aryl signals of the ligand in its 1H NMR. 125Te{1H} NMR spectra of Pd(II) and Pt(II) complexes have two signals. This in conjunction with the splitting of aryl doublets in their 1H NMR spectra suggest that dl and meso invertomers of both these complexes coexist in solution. The red shift (∼10 cm−) in v(Te‒CH2) and v[Te‒C(aryl)] further supports the ligation of 1 through tellurium atoms. Attempts to synthesize [Pd(1)2](ClOP4)2, [Pd(1)(ArTeCH2COO)]ClO4, and [Pd(1)(Ph2PCH2CH2PPh2)](ClO4)2 by reacting [PdCl2.1] with an appropriate second ligand in presence of AgClO4, did not succeed, but resulted in elemental tellurium, Ar‒Ar and CH2˭CH‒CH2OH.