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砷雜炔烴

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Chemical structure of the arsaalkyne AsCC6H2-2,4,6-(t-Bu)3.

砷雜炔烴之間以三鍵連接的有機化合物,它們和磷雜炔烴英語phosphaalkyne相比較為少見。[1]

合成與分離[編輯]

砷雜炔烴可由脫鹵化氫反應或鹼引發的消除反應製得,如HCAs由下式反應得到:

H
2
ClCAsH
2
+ 2 Na
2
CO
3
→ HCAs + 2 NaHCO
3
+ 2 NaCl

根據雙鍵規則英語double bond rule,砷雜炔烴有低聚傾向,試圖製備AsCCMe3時,只會得到具有立方烷結構的四聚體。[2]具有很大位阻取代基的C6H2-2,4,6-(t-Bu)3可以以單體的形式結晶出來,其As-C鍵的鍵長為1.657(7) Å。[3]

參見[編輯]

參考文獻[編輯]

  1. ^ Guillemin, Jean-Claude; Chrostowska, Anna; Dargelos, Alain; Nguyen, Thi Xuan Mai; Graciaa, Alain; Guenot, Pierre. Methylidynearsine (HC≡As): Synthesis and Direct Characterization by UV-Photoelectron Spectroscopy and Mass Spectrometry. Chemical Communications. 2008, (35): 4204–4206. PMID 18802530. doi:10.1039/B806771F. 
  2. ^ Hitchcock, Peter B.; Johnson, Julian A.; Nixon, John F. Synthesis and Structure of the Arsaalkyne Tetramer (AsCtBu)4 and its Fe(CO)4 Derivative. Angewandte Chemie International Edition in English. 1993, 32: 103–104. doi:10.1002/anie.199301031. 
  3. ^ Hitchcock, Peter B.; Jones, Cameron; Nixon, John F. Synthesis, Crystal and Molecular Structure of the First Metal Complex [Pt(PPh3)22-As≡C(C6H2But3)}] Derived from an Arsaalkyne. J. Chem. Soc., Chem. Commun. 1994, (18): 2061–2062. doi:10.1039/C39940002061.