2005年11月
Generation and reactions of overcrowded diaryldilithiostannane and diaryldipotassiostannane
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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- 巻
- 号
- 21
- 開始ページ
- 4291
- 終了ページ
- 4300
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/eijc.200500375
- 出版者・発行元
- WILEY-V C H VERLAG GMBH
Exhaustive reduction of an overcrowded dibromostannane bearing two bulky aromatic substituents, Tbt(Dip)SnBr2 {Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl; Dip = 2,6-diisopropylphenyl}, with an excess amount of lithium naphthalenide in THF at -78 degrees C gave the corresponding dilithiostannane, Tbt(Dip)SnLi2, the generation of which was confirmed by trapping experiments with some electrophiles together with Sn-119 and Li-7 NMR spectroscopy. The diaryldilithiostannane was found to be stable in solution under an inert gas below -25 degrees C. The potassium analogue, Tbt(Dip)SnK2, was also generated by the reduction of the dibromostannane in THF at -78 degrees C by the use of KC8 as a reductant. The reactions of dilithiostannane and dipotassiostannane obtained with o-dibromobenzene did not give a stannacyclopropabenzene derivative but an unexpected cyclization product, a stannacyclobutabenzene derivative, in contrast to the reactions of the corresponding dilithiosilane and dilithiogermane, Tbt(Dip)ELi2 (E = Si, Ge), with o-dibromobenzene leading to the formation of the corresponding metallacyclopropabenzenes as stable crystalline compounds. A preliminary result of the synthesis of a tin-tellurium double-bond compound from the dilithiostannane is also presented. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005).
- リンク情報
- ID情報
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- DOI : 10.1002/eijc.200500375
- ISSN : 1434-1948
- Web of Science ID : WOS:000233297800006