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Keywords:

  • aluminum compounds;
  • arsenic compounds;
  • heterocubanes;
  • lithium compounds;
  • silanes;
  • Zintl anions
Thumbnail image of graphical abstract

A considerable extension of the synthetic potential of lithium arsenides is likely through the alanates [LiAl(AsHR)4] (R[DOUBLE BOND]H, triorganosilyl), which can be synthesized from LiAlH4 and H2AsR. For example, the Zintl compound [Li(tmeda)]3 As71 was obtained by thermal decomposition in the presence of tmeda, and the first As4Si4 cubane was prepared by mild arsanylation of RSiCl3 (R[DOUBLE BOND]2,4,6-iPr3C6H2). The novel complex 2 with an adamantane framework was formed from RAsH2 (R[DOUBLE BOND]Me2C(iPr)SiMe2) and LiAlH4. tmeda[DOUBLE BOND]Me2NCH2CH2NMe2, dme[DOUBLE BOND]MeOCH2CH2OMe.