Heterocyclic organotellurium compounds as precursors for new organometallic derivatives of rhodium

A Porphyrin Skeleton Containing a Palladacyclopentadiene

“…Notably, on examination of literature only two examples of metal-h 1 -tellurophene coordination were found; these examples were of rhodium(III) bound to dibenzotelluro- phene and the sum of angles around tellurium were 2978 and 305,8 compared to 2768 for 5-PdCl 2 . [26] The 1 H NMR spectrum of 5-PdCl 2 (Figure 2) is fully consistent with the solid-state structure of this complex, in terms of the number of resonances, which indicate nonequivalency of all hydrogen atoms. The side-on coordination of palladium causes differentiation of signals of meso-phenyl substituents, observed below 280 K. The proton chemical shifts that are characteristic of porphyrins and the characteristic pattern of the UV/Vis electronic spectrum, which contains an intense Soret-like band at 442 and 493 nm, (Figure 3) are consistent with 5-PdCl 2 having macrocyclic aromaticity.…”

Synthesis, spectroscopic and structural studies on rhodium-(I) and -(III) and iridium-(I) and -(III) selenoether and telluroether complexes involving organometallic co-ligands

“…9 The reactions of monodentate heterocyclic organotellurium ligands with the pentamethylcyclopentadienylrhodium() dichloride dimer have also been reported as potential models for the initial steps in heterogeneously catalysed hydrodesulfurisation. 10,11 However the preparation of organometallic complexes with seleno-or telluro-ether ligands is generally limited to carbonyl containing species.…”

The First Metal Complexes of 1,4-Oxatellurane: Synthesis and Crystal Structure of its Platinum(II) complex

“…The [PdCl 2 (tellurocyclpentane) 2 ] is the first complex of tellurocyclopentane to be characterized structurally 4 . McWhinnie and his coworkers 4,5 have studied the reactions of Te heterocycles with Fe 3 (CO) 12, and [{Rh(η 5 -C 5 Me 5 )Cl 2 }] very recently. The detelluration of Te-heterocycles is a common feature of these reactions.…”