A. Singh, J. Kumar, R. Butcher
Jan 29, 2001
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0
Influential Citations
22
Citations
Journal
Inorganica Chimica Acta
Abstract
The first tellurated derivative of morpholine, N -{2-(4-methoxyphenyltelluro)ethyl}morpholine ( L 1 ) has been synthesized by reacting in situ generated ArTe − with 4-(2-chloroethyl)morpholine hydrochloride under N 2 atmosphere. The compound L 1 gives molecular ion peak at m / z 351 and is characterized structurally. The donor atoms N and Te in compound L 1 are rightly oriented for its ligation in bidentate mode. The TeC(alkyl) is 0.02 A longer than TeC(aryl). The complexes of ligand L 1 having composition [PtCl 2 ( L 1 ) 2 ] ( 1 ) and [RuCl 2 ( p -cymene) L 1 ] ( 2 ) have been synthesized. The compound 1 has been characterized structurally. The Pt has a square planar geometry in complex 1 and two molecules of ligand L 1 bonded through Te alone are trans to each other (PtTe=2.583(2) A). The 13 C{ 1 H} NMR spectrum of complex 1 is as expected. The 1 H NMR spectrum of single crystals of complex 1 shows multiplication of signals, which is supported by HETCOR experiments. The complex 2 also has ligand L 1 in a monodentate coordination mode, bonded through Te alone. This is supported by deshielded CH 2 Te and ArCTe signals in 1 H and 13 C{ 1 H} NMR spectra of complex 2 with respect to those of free ligand L 1 . The HETCOR spectrum of complex 2 has been used to authenticate the assignments of CH 2 Te group, as its two protons appear to be magnetically non-equivalent.