2-[2-(4-Methoxyphenyltelluro)ethyl]thiophene (L1) bis[2-(2-thienyl)ethyl] telluride (L2) and their metal complexes; crystal structure of trans-dichlorobis{2-(2-(4-methoxyphenyltelluro)ethyl)thiophene-Te}palladium(II) and {bis[2-(2-thienyl)ethyl] telluride}dichloro(p-cymene)ruthenium(II)

Tellurated heterocycles, 2-[(2-thienyltelluro)methyl]tetrahydrofuran (L1) and [(2-thienyltelluro)methyl]tetrahydro-2H-pyran (L2): Synthesis and complexation reactions with Pd(II), Pt(II), Hg(II), Ru(II) and Cu(I)

“…Both L 1 and L 2 are soluble in common organic solvents such as chloroform, dichloromethane and acetone but insoluble in hexane. The stabilities and solubilities of L 1 and L 2 are nearly similar to those of other tellurated heterocylcles [8,11,15,24,25]. The complexes 1-9 are soluble in common organic solvents such as chloroform and dichloromethane and are stable under ambient conditions.…”

“…Its H 7 also appears as a multiplet but is upfield as compared to H 8 and H 9 . In general theinyl protons appear somewhat deshielded in proton NMR spectrum of L 1 in comparison to those of 2-[2-(4-methoxyphenyltelluro) ethyl]thiophene [15]. In the 1 H NMR spectra of 1 and 2 the signals of H 1 (TeCH 2 ) appear as a multiplet and are deshielded by $0.59-0.72 ppm as compared to free ligand, indicating that L 1 binds to the metals through tellurium only.…”

“…Tellurium containing derivatives of heterocycles have been designed and used as ligands but in most of the asymmetric telluride ligands [RR 0 Te], having heterocyclic group [7][8][9][10][11][12][13][14][15][16] the other group is phenyl (or its substituted derivative). Some symmetric telluride ligands [R 2 Te] are also known in which two heterocyclic groups (R) are identical [13][14][15][16]. No telluride in which both heterocyclic groups are different, has been explored as a ligand so far.…”

Tellurium-chlorine secondary interactions in palladium(II) complex of MeOC6H4TeCH2CH2NHCH(CH3)C6H4-2-OH resulting in self-assembled bimolecular aggregates with short palladium-palladium distances

“…Attempts to grow single crystals of bromo and Pt analogues of complex 1 however, failed. The shortening of the Pd-Pd distance due to Te· · ·Cl secondary interactions has also been noticed in the palladium(II) complex of 2-[2-(4-methoxyphenyltelluro)ethyl]thiophene [26 ]. However, if in the coordination sphere of square planar palladium one of two tellurium atoms is replaced by sulfur as in the case of palladium(II) complex of 1-ethylthio-2-[2-thienyltelluro]ethane [27] Pd-Pd distance is found to be greater than the sum of van der Waal's radii.…”

Ligand concentration and reaction time controlled successive substitution of chloro and η6-benzene of di-μ-chlorobis{η6-benzene)dichlororuthenium(II)} with selenated Schiff base: Formation of half sandwich Ru(II) complex highly active catalyst for oxidation of alcohols

“…Di-l-chlorobis{g 6 -benzene)dichlororuthenium(II)}and it p-cymene analogue are generally used as precursors for preparing such half-sandwich compounds. Their chloro bridge breaking reactions are well known with a variety of ligands including Te donors [10][11][12][13][14] and result in the half sandwich species. An example is also known where pcymene of di-l-chlorobis{g 6 -p-cymene)dichlororuthenium(II)} is substituted by a tridendate (Te, O, N) ligand [14].…”