Comparative chemistry of isolable divalent compounds of silicon, germanium, and tin

研究成果: Article査読

61 被引用数 (Scopus)

抄録

Recent studies of the synthesis, structures, spectroscopic properties, and reactions of a series of isolable metallylenes (R 2E:, E = Si (1), Ge (2), and Sn (3); R 2 = 1,1,4,4-tetrakis(trimethylsilyl) butane-1,4-diyl) are summarized. Because these group-14 metallylenes bear the same helmet-like ligand, a straightforward discussion of the element-dependence of the intrinsic properties of the group-14 element divalent compounds is possible. All these metallylenes were monomeric both in solution and in the solid state, indicating the effective steric protection by the ligand against dimerization. A small σ-π conjugation between C-Si(substituent) σ orbitals and the vacant np z orbitals of divalent atoms in R 2E: exists and the extent decreases in the order E = Si > Ge > Sn, as evidenced by UV-vis and NMR spectroscopies and X-ray crystallography. However, the extent of the σ-π conjugation in metallylenes 1-3 was much smaller than the electron-donating effects of neighboring nitrogen atoms in known stable cyclic diamino-substituted metallylenes, and hence metallylenes 1-3 are regarded as the least electronically perturbed. Comparative studies of the unique reactions among these metallylenes are also discussed.

本文言語English
ページ(範囲)243-253
ページ数11
ジャーナルChemical Record
4
4
DOI
出版ステータスPublished - 2004 11月 9

ASJC Scopus subject areas

  • 化学 (全般)
  • 生化学
  • 化学工学(全般)
  • 材料化学

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