X-ray structural characterization of some sterically bulky N-donor and N-alkyl Grignard reagents

X-ray structural characterization of some sterically bulky N-donor and N-alkyl Grignard reagents
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DOI:
10.1016/j.ica.2005.08.009
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发表时间:
2006-01-01
影响因子:
2.8
通讯作者:
Kloth, M
Kloth, M
中科院分区:
化学3区
文献类型:
--
作者:
Andrews, PC;Brym, M;Kloth, M

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[MgBr 2(thf)(3)](1)和[FisoMg(thf)Cl](2)(2),(Fiso- = [ArNC(H)NAr](-),Ar = C6H3Pr ′-2,6)。2、[2-PyC(SiMe 3)(2)Mg(thf)Cl](2)(3)、[2-PyC(SiMe 3)(2)Mg(thf)Br](2)(4)和[(2-PyC(SiMe 3)(2)Mg(thf)))(2)(OEt)Cl]中心点Et 2 O(5)。(2-Py(SiMC_3)(2)CH = 2-(双-(三甲基甲硅烷基)甲基)2-吡啶)作为副产物从涉及有机金属物种和镁或二乙基镁的反应中分离。所有化合物均通过单晶X射线晶体学表征。化合物(1)和(5)具有三角双锥镁中心,而化合物(2)具有四方锥结构。化合物(1)是单体,而化合物(2)-(5)是双核的,其中镁中心由(2)-(4)中的两个卤化物桥接,并且(5)中的氯和乙氧基配体桥接。(c)2005 Elsevier B. V.保留所有权利。
[MgBr2(thf)(3)] (1) and [FisoMg(thf)Cl](2) (2), (Fiso- = [ArNC(H)NAr](-), Ar = C6H3Pr'-2,6). 2, [2-PyC(SiMe3)(2)Mg(thf)Cl](2) (3), [2-PyC(SiMe3)(2)Mg(thf)Br](2) (4), and [(2-PyC(SiMe3)(2)Mg(thf))(2)(OEt)Cl] center dot Et2O (5). (2-Py(SiMC3)(2) CH = 2-f bis-(trimethylsilyl)methyl)2-pyridine) were isolated as by-products from reactions involving organometallic species and magnesium or diethylmagnesium. All compounds were characterized by single crystal X-ray crystallography. Compounds (1) and (5) have trigonal bipyramidal magnesium centres, while compounds (2)44) have square pyramidal structures. Compound (1) is monomeric, while compounds (2)-(5) are dinuclear with magnesium centres bridged by two halides for (2)-(4), and a chloride and an ethoxy ligand in (5). (c) 2005 Elsevier B.V. All rights reserved.