Reaction of the electron-rich olefin [Et[graphic omitted]]2 with tellurium affords the thermally or photochemically labile Et[graphic omitted]Te which reacts with [M(CO)5(NCMe)](M = Cr, Mo, or W) or [NEt4][MnBr2(CO)4] to yield [M(CO)5Te[graphic omitted]Et}] or cis-[Mn(Br)(CO)4Te[graphic omitted]Et}]; the compound [Cr(CO)5Te[graphic omitted]Et}] is readily detellurated to yield the carbenemetal complex [Cr(CO)5[graphic omitted]Et}]; the molecule of the title compound lies on a crystallographic mirror plane with the carbene ligand perpendicular to this plane and Te–Cr = 2·765(4), Te–Ccarb= 2·12(2)Å, and ∠ Cr–Te–Ccarb= 96·1(5)°.
富电子烯烃 [Et[图略]]2 与
碲反应,得到热或光
化学不稳定的 Et[图略]Te,它与 [M(CO)5(NCMe)](M = Cr、Mo 或W) 或 [NEt4][MnBr2(CO)4] 生成 [M(CO)5Te[图形省略]Et}] 或顺式-[Mn(Br)(CO)4Te[图形省略]Et} ];化合物[Cr(CO)5Te[图形省略]Et}]很容易脱
碲化生成碳烯
金属络合物[Cr(CO)5[图形省略]Et}];标题化合物的分子位于晶体镜面上,卡宾
配体垂直于该平面,Te–Cr = 2·765(4),Te–Ccarb= 2·12(2)Å,∠ Cr–Te– Ccarb=96·1(5)°。