Bis(6-Diphenylphosphinoacenaphth-5-yl)Telluride as a Ligand toward Manganese and Rhenium Carbonyls

Abstract

The reaction of the previously known bis(6-diphenylphosphinoacenaphthyl-5-)telluride (6-Ph2P-Ace-5-)2Te (IV) with (CO)5ReCl and (CO)5MnBr proceeded with the liberation of CO and provided fac-(6-Ph2P-Ace-5-)2TeM(X)(CO)3 (fac-1: M = Re, X = Cl; fac-2: M = Mn, X = Br), in which IV acts as bidentate ligand. In solution, fac-1 and fac-2 are engaged in a reversible equilibrium with mer-(6-Ph2P-Ace-5-)2TeM(X)(CO)3 (mer-1: M = Re, X = Cl; mer-2: M = Mn, X = Br). Unlike fac-1, fac-2 is prone to release another equivalent of CO to give (6-Ph2P-Ace-5-)2TeMn(Br)(CO)2 (3), in which IV serves as tridentate ligand.

Bioinspired Mechanically Responsive Hydrogel upon Redox Mediated by Dynamic Coordination between Telluroether and Platinum Ions

“…The first organotellurium compound dialkyl tellurium was reported by Wöhler in 1980 . In the past decades, organotellurium compounds have aroused considerable attention, especially in the construction of stimulus responsive materials for diverse applications. − For example, by introducing Te as a catalytic site in serine protease, the natural proteins exhibited remarkable glutathione peroxidase catalytic activity. ,− Han and co-workers synthesized a series of organotellurium-based fluorescent probes, which enabled real-time monitoring of redox events in vivo by utilizing the sensitive response of organotellurium upon redox stimulus . In addition, the lower electronegativity of Te and the consequent greater electron-donating capability compared to selenium and/or sulfur revealed that incorporation of telluroether as donors in an arrangement could yield ligands with rich coordination chemistry, thus arousing considerable and continuous interests in tellurium ligands .…”

“…In addition, the lower electronegativity of Te and the consequent greater electron-donating capability compared to selenium and/or sulfur revealed that incorporation of telluroether as donors in an arrangement could yield ligands with rich coordination chemistry, thus arousing considerable and continuous interests in tellurium ligands . The remarkable development of tellurium ligands implicates an opportunity to open new frontiers of redox-responsive dynamic coordination. ,,− Unfortunately, limited reports have concerned this issue so far …”