Oxidation state, aggregation, and heterolytic dissociation of allyl indium reagents.
Oxidation state, aggregation, and heterolytic dissociation of allyl indium reagents.
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烯丙基铟试剂的氧化态、聚集和异解离解
DOI:
10.1021/ja908101j
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发表时间:
2010
影响因子:
15
通讯作者:
K. Koszinowski
中科院分区:
文献类型:
--
作者:
K. Koszinowski
Solutions of allyl indium reagents formed in the reactions of indium with allyl bromide and allyl iodide, respectively, inN,N-dimethylformamide, tetrahydrofuran, and water were analyzed by a combination of electrospray-ionization mass spectrometry, temperature-dependent1H NMR spectroscopy, and electrical conductivity measurements. Additional mass spectrometric experiments probed charge-tagged derivatives of the allyl indium reagents. The results obtained indicate the presence of allyl indium(+3) species, which undergo heterolytic dissociation to yield ions such as InR2(solv)+and InRX3−with R = allyl and X = Br and I. The extent of dissociation is greatest forN,N-dimethylformamide, whereas aggregation effects are more pronounced for the less polar tetrahydrofuran. The heterolytic dissociation of the allyl indium reagents supposedly enhances their reactivity by simultaneously providing highly Lewis acidic allyl indium cations and nucleophilic allyl indate anions.
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DOI:
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