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Ruthenium‐Assisted Tellurium Abstraction in Bis(thiophen‐2‐yl) Ditelluride

Von Wiley-VCH zur Verfügung gestellt

The treatment of [RuCl2(CO)3]2 with Te2Tpn2 (Tpn=thiophen-2-yl, C4H3S) in the absence of light leads to the formation of TeTpn2 and Te(s), and eventually to the formation of [RuCl2(CO)2(TeTpn2)2]. The complex formation is slower than the dissociation of Te2Tpn2. The PBE0-D3/def2-TZVP calculations have been utilized to propose a catalytic cycle for the decomposition of Te2Tpn2 to TeTpn2.


Abstract

The reaction of [RuCl2(CO)3]2 and Te2Tpn2 (Tpn=thiophen-2-yl, C4H3S) in the absence of light resulted in the formation of cct-[RuCl2(CO)2(TeTpn2)2] (1) [cis(Cl)-cis(CO)-trans(TeTpn2)] and TeTpn2 (2) together with the precipitation of tellurium. The complex 1 and the monotelluride 2 were characterized by NMR spectroscopy and single-crystal X-ray diffraction. The decomposition of Te2Tpn2 to TeTpn2 has been monitored by 125Te NMR spectroscopy and seemed to be faster than the ligand substitution in [RuCl2(CO)3]2 by TeTpn2. A catalytic cycle is proposed for the decomposition of Te2Tpn2 to TeTpn2 based on the PBE0-D3/def2-TZVP calculations.

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