((THF)μ-Li[PhB(μ-N(t)Bu)2])2Mg | 881212-26-6

• 英文名称: ((THF)μ-Li[PhB(μ-N(t)Bu)2])2Mg
• CAS: 881212-26-6
• 化学式: C₃₆H₆₂B₂Li₂MgN₄O₂
• 分子量: 642.723
• InChiKey: KAILHYUZFSKGER-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  四氢呋喃 、 Li2[PhB(μ3-N(t)Bu)2] 、 苯基氯化镁 以 四氢呋喃 、 甲苯 为溶剂， 以71%的产率得到((THF)μ-Li[PhB(μ-N(t)Bu)2])2Mg
  参考文献：
  名称：

  Syntheses and Structures of Magnesium and Zinc Boraamidinates:  EPR and DFT Investigations of Li, Mg, Zn, B, and In Complexes of the [PhB(N^tBu)₂]^•- Anion Radical

  摘要：

  The first magnesium and zinc boraamidinate(bam) complexes have been synthesized via metathetical reactions between dilithio, bams and Grignard reagents or MCl2 (M = Mg, Zn). The following new classes of bam complexes have been structurally characterized: heterobimetallic spirocycles {(L)mu-Li[PhB(mu-(NBu)-Bu-t)(2)]}(2)M (6a, b, M = Mg, L = Et2O, THF; 6c, M = Zn, L = Et2O); bis(organomagnesium) complexes {[PhB(mu(3)-(NBu)-Bu-t)(2)]((MgBu)-Bu-t)(2)(mu(3)-Cl)Li(OEt2)(3)} (8) and {[PhB(mu(3)-(NBu)-Bu-t)(2)](MgR)(2)(THF)(2)} (9a, R = Pr-i; 9b, R = Ph); mononuclear complex {[PhB(mu-NDiPP)(2)]Mg-(OEt2)(2)} (10). Oxidation of 6a or 6c with iodine produces persistent pink (16a, M = Mg) or purple (16b, M = Zn) neutral radicals {L-x-mu-Li[PhB(mu-(NBu)-Bu-t)(2)](2)M}(circle) (L = solvent molecule), which are shown by EPR spectra supported by DFT calculations to be C-s-symmetric species with spin density localized on one of the bam ligands, In contrast, characterization of the intensely colored neutral radicals {[PhB(mu-(NBu)-Bu-t)(2)](2)M}(circle) (5c, M = In, dark green; 5d, M = B, dark purple) reveals that the spin density is equally delocalized over all four nitrogen atoms in these D-2d(-) symmetric spirocyclic systems. Oxidation of the dimeric dilithio complex {Li-2[PhB(mu(4)-(NBu)-Bu-t)(2)]}(2) with iodine produces the monomeric neutral radical {[PhB(mu-(NBu)-Bu-t)(2)]Li(OEt2)(x)}(circle) (17), characterized by EPR spectra and DFT calculations. These findings establish that the bam anionic radical [PhB((NBu)-Bu-t)(2)](circle-) can be stabilized by coordination to a variety of early main-group metal centers to give neutral radicals whose relative stabilities are compared and discussed.

  DOI：

  10.1021/ic0520014