We report the facile and high-yielding multi-gram synthesis of pentavalent heavy group VI mono-imido complexes with the general formula M(NR)Cl₃L_n (M=Mo, W, R=Aryl or Alkyl, L=DME n=1 or Py n=2) following a comproportionative imido group transfer procedure starting from the corresponding bis-imido complexes and MCl₄. The procedure works well for both aryl and alkyl imido ligands, in the case of molybdenum but only for alkyl imidos in the case of tungsten. Overall, five mono-imido complexes have been structurally characterized and purity is established by elemental analysis and EPR spectroscopy.

中文翻译：

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构建钼(V)和钨(V)单亚氨基三氯化配合物的通用配比路线

我们报道了五价重族 VI 单亚氨基配合物的简便且高产率的多克合成，其通式为 M(NR)Cl ₃ L _n (M=Mo, W, R=芳基或烷基，L=DME n =1或Py n=2)，遵循从相应的双亚氨基络合物和MCl ₄开始的比例亚氨基基团转移程序。该程序对于钼的情况下的芳基和烷基亚氨基配体均适用，但仅适用于钨的烷基亚氨基配体。总体而言，已对五种单亚氨基配合物进行了结构表征，并通过元素分析和 EPR 光谱确定了纯度。