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Syntheses and Characterization of Manganese‐Tellurolate Complexes by Using Chelating Metalloligand cis ‐[Mn(Co) 4 (TePh) 2 ] − and Potential Electrophilic TeMe + Reagent

1996; Wiley; Volume: 43; Issue: 1 Linguagem: Inglês

10.1002/jccs.199600005

2192-6549

Wen‐Feng Liaw, Show‐Jen Chiou, Way‐Zen Lee, Gene‐Hsiang Lee, Shie‐Ming Peng,

Organoselenium and organotellurium chemistry

Abstract The cis ‐[Mn(CO) 4 (TePh) 2 ] − , similar to bidentate ligand PhTe(CH 2 ) 3 TePh, acts as a “chelating metalloligand” for the synthesis of metallic tellurolate compounds. The reaction of cis [Mn(CO) 4 (TePh) 2 ] − with BrMn(CO) 5 in THF leads to a mixture of products[(CO) 3 ,BrMn(μ‐TePh) 2 Mn(CO) 4 ] − (1) and Mn 2 (μ‐TePh) 2 (CO) g (2). Complex 1 crystallizes in the triclinic space group Pl̄ with a = 11.309(3) Å, b = 14.780(5) Å, c = 19.212(6) Å, a = 76.05(3)° β = 72.31(3)°, γ = 70.41(3)° V = 2848(2) Å 3 , Z = 2. Final R = 0.034 and R w = 0.035 resulting from refinement of 10021 total reflections with 677 parameters, Dropwise addition of (MeTe) 2 to a solution of [Me 3 O][BF 4 ] in CH 3 CN leads to formation of [Me 2 TeTeMe][BF 4 ], a potential MeTe + donor ligand. In contrast to oxidative addition of diphenyl ditelluride to [Mn(CO)s] − to give cis ‐[Mn(CO) 4 (TePh) 2 ] − which was thermally transformed into [(CO) 3 Mn(μ‐TePh) 3 Mn(CO) 3 ] − , reaction of [Mn(CO) 5 ] − with [Me 2 TeTeMe] + proceeded to give the monomeric species MeTeMn(CO) 5 as initial product which was then dimerized into Mn 2 (μ‐TeMe) 2 (CO) g (4).