具有镁-镁键的稳定一价镁化合物。
Stable magnesium(I) compounds with Mg-Mg bonds.
作者信息
Green Shaun P, Jones Cameron, Stasch Andreas
机构信息
School of Chemistry, Monash University, Post Office Box 23, Victoria 3800, Australia.
出版信息
Science. 2007 Dec 14;318(5857):1754-7. doi: 10.1126/science.1150856. Epub 2007 Nov 8.
The chemistry of the group 2 metals (beryllium, magnesium, calcium, strontium, and barium) is dominated by the +2 oxidation state. Here, we report the reductions of two magnesium(II) iodide complexes with potassium metal in toluene, leading to thermally stable magnesium(I) compounds, (L)MgMg(L) (where L is [(Ar)NC(NPri2)N(Ar)]- or {[(Ar)NC(Me)]2CH}-, Ar is 2,6-diisopropylphenyl, Me is methyl, and Pri is isopropyl) in moderate yields. The results of x-ray crystallographic and theoretical studies are consistent with central Mg2+(2) units that have single, covalent magnesium-magnesium bonding interactions with 2.8508 +/- 0.0012 (standard deviation) and 2.8457 +/- 0.0008 angstrom bond lengths, respectively, and predominantly ionic interactions with the anionic ligands (L).
第2族金属（铍、镁、钙、锶和钡）的化学性质主要由 +2 氧化态主导。在此，我们报道了在甲苯中用金属钾还原两种碘化镁（II）配合物，以中等产率得到热稳定的镁（I）化合物（L）MgMg（L）（其中 L 为 [(Ar)NC(NPri2)N(Ar)]- 或 {[(Ar)NC(Me)]2CH}-，Ar 为 2,6 - 二异丙基苯基，Me 为甲基，Pri 为异丙基）。X 射线晶体学和理论研究结果表明，中心 Mg2+(2) 单元具有单共价镁 - 镁键相互作用，键长分别为 2.8508 ± 0.0012（标准偏差）埃和 2.8457 ± 0.0008 埃，并且与阴离子配体（L）主要存在离子相互作用。
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