Mechanochemistry has great potential in the syntheses of low-valent Mg(I) complexes. Magnesium iodide precursors with three different β-diketiminate (BDI) ligands of varying bulk have been reduced with K/KI (or Na/NaCl) using the ball-mill. Depending on the steric bulk of the ligand, the raw products are intensely colored powders, indicating the presence of (BDI)Mg⋅ radicals. Extraction with pentane
机械化学在合成低价 Mg(I) 配合物方面具有巨大潜力。使用球磨机用 K/KI(或 Na/NaCl)还原了具有不同体积的三种不同 β-二酮亚胺 (BDI) 配体的碘化镁前体。根据配体的空间体积,原始产品是颜色很深的粉末,表明存在 (BDI)Mg·自由基。用戊烷萃取以优异的收率得到 (BDI)Mg-Mg(BDI)。萃取前粉末与H 2反应得到[(BDI)MgH] 2。用苯萃取得到(BDI)Mg(C 6 H 6 )Mg(BDI),其具有去芳构化的褶皱苯双阴离子。在三苯基苯存在下球磨得到具有Ph 3 C 6的双核Mg络合物H 3 -二阴离子缓慢分解为(BDI)Mg-Mg(BDI)和Ph 3 C 6 H 3。