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首页> 外文期刊>Organometallics >Reactivity Studies of [(thf)(2)Mg{mu-C(CH3)(2)C2H4C(CH3)(2)}](2): Scrambling Reactions and Diverse Reactions with Dichlorophenylphosphane
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Reactivity Studies of [(thf)(2)Mg{mu-C(CH3)(2)C2H4C(CH3)(2)}](2): Scrambling Reactions and Diverse Reactions with Dichlorophenylphosphane

机译:[(thf)(2)Mg {mu-C(CH3)(2)C2H4C(CH3)(2)}](2)的反应性研究:加二氯苯基膦的加扰反应和不同反应

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摘要

In THF solution [{(thf)(2)Mg{mu-C(CH3)(2)C2H4(CH3)(2)C}}(2)] (1) exchanges the alkanediide ligand with [{(thf)(2)Mg{mu-CH2)(5)}}(2)] in an equilibrium leading to the formation of (thf)(2)Mg}(2){mu-C(CH3)(2)C2H4C(CH3)(2)}{mu-(CH2)(5)}] (2). Depending on the crystallization temperature, homoleptic 1 or heteroleptic 2 crystallizes from THF solutions, verifying a temperature-dependent Schlenk equilibrium. Irradiation of a solution of 1 in [D-8]THF with UV light yields magnesium hydride and alkene via a beta-hydride elimination reaction. In a metathetical approach dichlorophenylphosphane reacts with 1 in THF to give the intermediate "PhP(CI){C(CH3)(2)C2H4(CH3)(2)CMgCl" (3-MgCl), which forms three subsequent products. In order to ease handling and characterization of these compounds, hydrolysis and oxidation with sulfur has been performed. This product mixture was separated by column chromatography, yielding the chlorophosphane sulfide [Ph(S)P(Cl){C(CH3)(2)C2H4(CH3)(2)CH)}] (3-S), the cyclic phosphane sulfide [Ph(S)P{C(CH3)(2)C2H4(CH3)(2)C)}] (4-S), and the cyclic 1,1-diphosphane disulfide [{(Ph(S)P}(2){mu-C(CH3)(2)C2H4(CH3)(2)C}] (6-S-2). Furthermore, traces of the acyclic 1,1-diphosphane disulfides [{PhP(S)(C(CH3)(2)C2H4CH(CH3)(2))}{PhP(S)(C(CH3)(2)C2H4C(CH3)(CH2)}] (8-S-2) and meso-[{Ph(S)P(C(CH3)(2)C2H4(CH3)(2)CH)}(2)] (7-S-2) have also been isolated. Compounds 6-8 represent the phosphorus-containing products of indirect Grignard reductions.
机译:在THF溶液中[{{(thf)(2)Mg {mu-C(CH3)(2)C2H4(CH3)(2)C}}(2)](1)将烷二酰亚胺配体与[{ 2)Mg {mu-CH2)(5)}}(2)]处于平衡状态,导致形成(thf)(2)Mg}(2){mu-C(CH3)(2)C2H4C(CH3) (2)} {mu-(CH2)(5)}](2)。取决于结晶温度,均熔剂1或杂合剂2从THF溶液中结晶,从而验证了温度相关的Schlenk平衡。用紫外线照射1在[D-8] THF中的溶液,通过β-氢化物消除反应生成氢化镁和烯烃。在一种复分解方法中,二氯苯基膦与THF中的1反应生成中间体“ PhP(Cl){C(CH3)(2)C2H4(CH3)(2)CMgCl”(3-MgCl),形成了三个后续产物。为了简化这些化合物的处理和表征,已经进行了用硫进行的水解和氧化。通过柱色谱分离该产物混合物,得到氯膦硫化物[Ph(S)P(Cl){C(CH3)(2)C2H4(CH3)(2)CH)}](3-S),环膦硫化物[Ph(S)P {C(CH3)(2)C2H4(CH3)(2)C)}](4-S)和环状1,1-二膦二硫化物[{(Ph(S)P} (2){mu-C(CH3)(2)C2H4(CH3)(2)C}](6-S-2)。此外,还有痕量的无环1,1-二膦二硫化物[{PhP(S)( C(CH3)(2)C2H4CH(CH3)(2))} {PhP(S)(C(CH3)(2)C2H4C(CH3)(CH2)}](8-S-2)和内消旋[{还分离了Ph(S)P(C(CH3)(2)C2H4(CH3)(2)CH)}(2)](7-S-2)。化合物6-8代表间接格氏减少量。

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